From 086fef2122609d9aebcd5f343719b934396f2c9a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:39:33 +0100
Subject: [PATCH 001/100] 2015: d01: ex1: add input

---
 2015/d01/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d01/ex1/input

diff --git a/2015/d01/ex1/input b/2015/d01/ex1/input
new file mode 100644
index 0000000..f7beb58
--- /dev/null
+++ b/2015/d01/ex1/input
@@ -0,0 +1 @@
+((((()(()(((((((()))(((()((((()())(())()(((()((((((()((()(()(((()(()((())))()((()()())))))))))()((((((())((()))(((((()(((((((((()()))((()(())()((())((()(()))((()))()))()(((((()(((()()))()())((()((((())()())()((((())()(()(()(((()(())(()(())(((((((())()()(((())(()(()(()(())))(()((((())((()))(((()(()()(((((()()(()(((()(((((())()))()((()(()))()((()((((())((((())(()(((())()()(()()()()()(())((((())((())(()()))()((((())))((((()())()((((())((()())((())(())(((((()((((()(((()((((())(()(((()()))()))((((((()((())()())))(((()(()))(()()(()(((()(()))((()()()())((()()()(((())())()())())())((()))(()(()))(((((()(()(())((()(())(())()((((()())()))((((())(())((())())((((()(((())(())((()()((((()((((((()(())()()(()(()()((((()))(())()())()))(())))(())))())()()(())(()))()((()(()(())()()))(()())))))(()))(()()))(())(((((()(()(()()((())()())))))((())())((())(()(())((()))(())(((()((((((((()()()(()))()()(((()))()((()()(())(())())()(()(())))(((((()(())(())(()))))())()))(()))()(()(((((((()((((())))())())())())()((((((((((((((()()((((((()()()())())()())())())(())(())))())((()())((()(()))))))()))))))))))))))))())((())((())()()))))))(((()((()(()()))((())(()()))()()())))(())))))))(()(((())))())()())))()()(())()))()(()))())((()()))))(()))))()))(()()(())))))))()(((()))))()(()))(())())))))()))((()))((()))())(())))))))))((((())()))()))()))())(())()()(())))())))(()())()))((()()(())))(())((((((()(())((()(((()(()()(())))()))))))()))()(()((()))()(()))(()(((())((((())())(())(()))))))))())))))))())())))))())))))()()(((())()(()))))))))())))))(())()()()))()))()))(()(())()()())())))))))())()(()(()))))()()()))))())(()))))()()))))()())))))(((())()()))(()))))))))))()()))))()()()))))(()())())()()())()(()))))()(()))(())))))))(((((())(())())()()))()()))(())))))()(()))))(())(()()))()())()))()))()))()))))())()()))())())))(()))(()))))))())()(((())()))))))))()))()())))())))())))()))))))))))()()))(()()))))))(())()(()))))())(()))))(()))))(()())))))())())()()))))())()))))))))(()))))()))))))()(()())))))))()))())))())))())))())))))))())(()()))))))(()())())))()())()))))))))))))))())))()(())))()))())()()(())(()()))(())))())()())(()(()(()))))())))))))))))())(()))()))()))))(())()())()())))))))))))()()))))))))))))())())))))(()())))))))))))())(())))()))))))))())())(()))()))(())))()))()()(())()))))))()((((())()))())())))))()))()))))((()())()))))())))(())))))))))))))))))()))))()()())()))()()))))())()))((()())))())))(()))(()())))))))()))()))))(())))))))(())))))())()()(()))())()))()()))))())()()))))())()))())))))))(()))))()())()))))))))(()))())))(()))()))))(())()))())())(())())())))))))((((())))))()))()))()())()(())))()))()))()())(()())()()(()())()))))())())))))(()))()))))())(()()(())))))(())()()((())())))))(())(())))))))())))))))))()(())))))))()())())())()(()))))))))(()))))))))())()()))()(()))))))()))))))())))))))(())))()()(())()())))))(((())))()((())()))())))(()()))())(())())))()(((()())))))()(()()())))()()(()()(()()))())()(()()()))())()()))()())(()))))())))))())))(())()()))))(()))))(())(()))(())))))()()))()))))())()))()()(())())))((()))())()))))))()()))))((()(()))))()()))))))())))))())(()((()())))))))))))()())())))()))(()))))))(()))(())()())))(()))))))))())()()()()))))(()())))))))((())))()))(()))(())(())()())()))))))))(())))())))(()))()()))(()()))(()))())))()(())))())((()((()(())))((())))()))))((((())())()())))(())))()))))))())(()()((())))())()(()())))))(()())()))())))))))((())())))))))(()(()))())()()(()()(((()(((()())))))()))))))()(())(()()((()()(())()()))())()())()))()())())())))))))(((())))))))()()))))))(((())()))(()()))(()()))))(()(()()((((())()())((()()))))(()(())))))()((()()()())()()((()((()()))(()))(((()()()))(((())))()(((())()))))))((()(())())))(()())(((((()(()))(()((()))(()())()))))(()(()))()(()))(())(((())(()()))))()()))(((()))))(()()()()))())))((()()()(())()))()))))()()))()))))))((((((()()()))))())((()()(((()))))(()(())(()()())())())))()(((()()))(())((())))(()))(()()()())((())())())(()))))()))()((()(())()(()()(())(()))(())()))(())(()))))(())(())())(()()(()((()()((())))((()))()((())))(((()()()()((((()))(()()))()()()(((())((())())(()()(()()()))()((())(())()))())(((()()(())))()((()()())()())(()(())())(((())(())())((())(())()(((()()))(())))((())(()())())(())((()()()((((((())))((()(((((())()))()))(())(()()))()))(())()()))(())((()()())()()(()))())()((())))()((()()())((((()())((())())())((()((()))()))((())((()()(()((()()(((())(()()))))((()((())()(((())(()((())())((())(()((((((())())()(()())()(())(((())((((((()(())(()((()()()((()()(()()()())))()()(((((()()))()((((((()))()(()(()(()(((()())((()))())()((()))(())))()))()()))())()()))())((((())(()(()))(((((((())(((()(((((()(((()()((((())(((())())))(()()()(()(()))()))((((((()))((()(((()(())((()((((()((((((())(((((())))(((()(()))))(((()(((())()((())(()((()))(((()()(((())((((()(()(((((()))(((()(((((((()(()()()(()(()(()()())(())(((((()(())())()())(()(()(()))()(()()()())(()()(()((()))()((())())()(()))((())(()))()(()))()(((()(()(()((((((()()()()())()(((((()()(((()()()((()(((((()))((((((((()()()(((((()))))))(()()()(())(()))(()()))))((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\ No newline at end of file

From 380b527017eb590e07f5f655380b04743bfae089 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:39:38 +0100
Subject: [PATCH 002/100] 2015: d01: ex1: add solution

---
 2015/d01/ex1/ex1.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 2015/d01/ex1/ex1.py

diff --git a/2015/d01/ex1/ex1.py b/2015/d01/ex1/ex1.py
new file mode 100755
index 0000000..616d288
--- /dev/null
+++ b/2015/d01/ex1/ex1.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+
+
+def solve(input: str) -> int:
+    directions = collections.Counter(input.strip())
+    return directions["("] - directions[")"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 8c3207a3858c76705e194786fb49b67943d637d4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:39:44 +0100
Subject: [PATCH 003/100] 2015: d01: ex2: add input

---
 2015/d01/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d01/ex2/input

diff --git a/2015/d01/ex2/input b/2015/d01/ex2/input
new file mode 100644
index 0000000..f7beb58
--- /dev/null
+++ b/2015/d01/ex2/input
@@ -0,0 +1 @@
+((((()(()(((((((()))(((()((((()())(())()(((()((((((()((()(()(((()(()((())))()((()()())))))))))()((((((())((()))(((((()(((((((((()()))((()(())()((())((()(()))((()))()))()(((((()(((()()))()())((()((((())()())()((((())()(()(()(((()(())(()(())(((((((())()()(((())(()(()(()(())))(()((((())((()))(((()(()()(((((()()(()(((()(((((())()))()((()(()))()((()((((())((((())(()(((())()()(()()()()()(())((((())((())(()()))()((((())))((((()())()((((())((()())((())(())(((((()((((()(((()((((())(()(((()()))()))((((((()((())()())))(((()(()))(()()(()(((()(()))((()()()())((()()()(((())())()())())())((()))(()(()))(((((()(()(())((()(())(())()((((()())()))((((())(())((())())((((()(((())(())((()()((((()((((((()(())()()(()(()()((((()))(())()())()))(())))(())))())()()(())(()))()((()(()(())()()))(()())))))(()))(()()))(())(((((()(()(()()((())()())))))((())())((())(()(())((()))(())(((()((((((((()()()(()))()()(((()))()((()()(())(())())()(()(())))(((((()(())(())(()))))())()))(()))()(()(((((((()((((())))())())())())()((((((((((((((()()((((((()()()())())()())())())(())(())))())((()())((()(()))))))()))))))))))))))))())((())((())()()))))))(((()((()(()()))((())(()()))()()())))(())))))))(()(((())))())()())))()()(())()))()(()))())((()()))))(()))))()))(()()(())))))))()(((()))))()(()))(())())))))()))((()))((()))())(())))))))))((((())()))()))()))())(())()()(())))())))(()())()))((()()(())))(())((((((()(())((()(((()(()()(())))()))))))()))()(()((()))()(()))(()(((())((((())())(())(()))))))))())))))))())())))))())))))()()(((())()(()))))))))())))))(())()()()))()))()))(()(())()()())())))))))())()(()(()))))()()()))))())(()))))()()))))()())))))(((())()()))(()))))))))))()()))))()()()))))(()())())()()())()(()))))()(()))(())))))))(((((())(())())()()))()()))(())))))()(()))))(())(()()))()())()))()))()))()))))())()()))())())))(()))(()))))))())()(((())()))))))))()))()())))())))())))()))))))))))()()))(()()))))))(())()(()))))())(()))))(()))))(()())))))())())()()))))())()))))))))(()))))()))))))()(()())))))))()))())))())))())))())))))))())(()()))))))(()())())))()())()))))))))))))))())))()(())))()))())()()(())(()()))(())))())()())(()(()(()))))())))))))))))())(()))()))()))))(())()())()())))))))))))()()))))))))))))())())))))(()())))))))))))())(())))()))))))))())())(()))()))(())))()))()()(())()))))))()((((())()))())())))))()))()))))((()())()))))())))(())))))))))))))))))()))))()()())()))()()))))())()))((()())))())))(()))(()())))))))()))()))))(())))))))(())))))())()()(()))())()))()()))))())()()))))())()))())))))))(()))))()())()))))))))(()))())))(()))()))))(())()))())())(())())())))))))((((())))))()))()))()())()(())))()))()))()())(()())()()(()())()))))())())))))(()))()))))())(()()(())))))(())()()((())())))))(())(())))))))())))))))))()(())))))))()())())())()(()))))))))(()))))))))())()()))()(()))))))()))))))())))))))(())))()()(())()())))))(((())))()((())()))())))(()()))())(())())))()(((()())))))()(()()())))()()(()()(()()))())()(()()()))())()()))()())(()))))())))))())))(())()()))))(()))))(())(()))(())))))()()))()))))())()))()()(())())))((()))())()))))))()()))))((()(()))))()()))))))())))))())(()((()())))))))))))()())())))()))(()))))))(()))(())()())))(()))))))))())()()()()))))(()())))))))((())))()))(()))(())(())()())()))))))))(())))())))(()))()()))(()()))(()))())))()(())))())((()((()(())))((())))()))))((((())())()())))(())))()))))))())(()()((())))())()(()())))))(()())()))())))))))((())())))))))(()(()))())()()(()()(((()(((()())))))()))))))()(())(()()((()()(())()()))())()())()))()())())())))))))(((())))))))()()))))))(((())()))(()()))(()()))))(()(()()((((())()())((()()))))(()(())))))()((()()()())()()((()((()()))(()))(((()()()))(((())))()(((())()))))))((()(())())))(()())(((((()(()))(()((()))(()())()))))(()(()))()(()))(())(((())(()()))))()()))(((()))))(()()()()))())))((()()()(())()))()))))()()))()))))))((((((()()()))))())((()()(((()))))(()(())(()()())())())))()(((()()))(())((())))(()))(()()()())((())())())(()))))()))()((()(())()(()()(())(()))(())()))(())(()))))(())(())())(()()(()((()()((())))((()))()((())))(((()()()()((((()))(()()))()()()(((())((())())(()()(()()()))()((())(())()))())(((()()(())))()((()()())()())(()(())())(((())(())())((())(())()(((()()))(())))((())(()())())(())((()()()((((((())))((()(((((())()))()))(())(()()))()))(())()()))(())((()()())()()(()))())()((())))()((()()())((((()())((())())())((()((()))()))((())((()()(()((()()(((())(()()))))((()((())()(((())(()((())())((())(()((((((())())()(()())()(())(((())((((((()(())(()((()()()((()()(()()()())))()()(((((()()))()((((((()))()(()(()(()(((()())((()))())()((()))(())))()))()()))())()()))())((((())(()(()))(((((((())(((()(((((()(((()()((((())(((())())))(()()()(()(()))()))((((((()))((()(((()(())((()((((()((((((())(((((())))(((()(()))))(((()(((())()((())(()((()))(((()()(((())((((()(()(((((()))(((()(((((((()(()()()(()(()(()()())(())(((((()(())())()())(()(()(()))()(()()()())(()()(()((()))()((())())()(()))((())(()))()(()))()(((()(()(()((((((()()()()())()(((((()()(((()()()((()(((((()))((((((((()()()(((((()))))))(()()()(())(()))(()()))))((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\ No newline at end of file

From c6afe68ac50c7e63ea57de3aaf67859a034f384c Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:39:52 +0100
Subject: [PATCH 004/100] 2015: d01: ex2: add solution

---
 2015/d01/ex2/ex2.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100755 2015/d01/ex2/ex2.py

diff --git a/2015/d01/ex2/ex2.py b/2015/d01/ex2/ex2.py
new file mode 100755
index 0000000..4383f4a
--- /dev/null
+++ b/2015/d01/ex2/ex2.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    BASEMENT = -1
+    current = 0
+    for i, c in enumerate(input, start=1):
+        current += 1 if c == "(" else -1
+        if current == BASEMENT:
+            return i
+    assert False  # Sanity check
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 79e75fe0a5866d797019ea569b804cbef71cf602 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:47:26 +0100
Subject: [PATCH 005/100] 2015: d02: ex1: add input

---
 2015/d02/ex1/input | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1000 insertions(+)
 create mode 100644 2015/d02/ex1/input

diff --git a/2015/d02/ex1/input b/2015/d02/ex1/input
new file mode 100644
index 0000000..2f04474
--- /dev/null
+++ b/2015/d02/ex1/input
@@ -0,0 +1,1000 @@
+20x3x11
+15x27x5
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From 948e946f1df421fcb1518151533173130ae1f0ff Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:47:33 +0100
Subject: [PATCH 006/100] 2015: d02: ex1: add solution

---
 2015/d02/ex1/ex1.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 2015/d02/ex1/ex1.py

diff --git a/2015/d02/ex1/ex1.py b/2015/d02/ex1/ex1.py
new file mode 100755
index 0000000..9127151
--- /dev/null
+++ b/2015/d02/ex1/ex1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[int, int, int]:
+        x, y, z = map(int, input.split("x"))
+        return x, y, z
+
+    def parse(input: str) -> list[tuple[int, int, int]]:
+        return [parse_line(line) for line in input.splitlines()]
+
+    def wrapping_paper(x: int, y: int, z: int) -> int:
+        slack = min(x * y, y * z, z * x)
+        return 2 * (x * y + y * z + z * x) + slack
+
+    presents = parse(input)
+    return sum(wrapping_paper(*present) for present in presents)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 3e12df9ac750947428b2f0bb31df350921e6b617 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:47:40 +0100
Subject: [PATCH 007/100] 2015: d02: ex2: add input

---
 2015/d02/ex2/input | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1000 insertions(+)
 create mode 100644 2015/d02/ex2/input

diff --git a/2015/d02/ex2/input b/2015/d02/ex2/input
new file mode 100644
index 0000000..2f04474
--- /dev/null
+++ b/2015/d02/ex2/input
@@ -0,0 +1,1000 @@
+20x3x11
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From 175f1773bdd200772bb14bf951abf77e858ea79b Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:47:45 +0100
Subject: [PATCH 008/100] 2015: d02: ex2: add solution

---
 2015/d02/ex2/ex2.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 2015/d02/ex2/ex2.py

diff --git a/2015/d02/ex2/ex2.py b/2015/d02/ex2/ex2.py
new file mode 100755
index 0000000..b28720b
--- /dev/null
+++ b/2015/d02/ex2/ex2.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[int, int, int]:
+        x, y, z = map(int, input.split("x"))
+        return x, y, z
+
+    def parse(input: str) -> list[tuple[int, int, int]]:
+        return [parse_line(line) for line in input.splitlines()]
+
+    def ribbon(x: int, y: int, z: int) -> int:
+        bow = x * y * z
+        return 2 * min(x + y, y + z, z + x) + bow
+
+    presents = parse(input)
+    return sum(ribbon(*present) for present in presents)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 3d6c56044921cb4903d94684877fc1003b2ece1a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:55:28 +0100
Subject: [PATCH 009/100] 2015: d03: ex1: add input

---
 2015/d03/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d03/ex1/input

diff --git a/2015/d03/ex1/input b/2015/d03/ex1/input
new file mode 100644
index 0000000..03504fc
--- /dev/null
+++ b/2015/d03/ex1/input
@@ -0,0 +1 @@
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\ No newline at end of file

From b27649bb65cfba478b669c5ebb6b1fb125f4cf0c Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:55:40 +0100
Subject: [PATCH 010/100] 2015: d03: ex1: add solution

---
 2015/d03/ex1/ex1.py | 55 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100755 2015/d03/ex1/ex1.py

diff --git a/2015/d03/ex1/ex1.py b/2015/d03/ex1/ex1.py
new file mode 100755
index 0000000..ef5bf4b
--- /dev/null
+++ b/2015/d03/ex1/ex1.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+
+import enum
+import sys
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+class Direction(enum.StrEnum):
+    NORTH = "^"
+    EAST = ">"
+    SOUTH = "v"
+    WEST = "<"
+
+    def apply(self, p: Point) -> Point:
+        match self:
+            case Direction.NORTH:
+                dx, dy = -1, 0
+            case Direction.EAST:
+                dx, dy = 0, 1
+            case Direction.SOUTH:
+                dx, dy = 1, 0
+            case Direction.WEST:
+                dx, dy = 0, -1
+        return Point(p.x + dx, p.y + dy)
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Direction]:
+        return [Direction(c) for c in input.strip()]
+
+    def distribute_presents(moves: list[Direction]) -> set[Point]:
+        pos = Point(0, 0)
+        seen = {pos}
+        for move in moves:
+            pos = move.apply(pos)
+            seen.add(pos)
+        return seen
+
+    moves = parse(input)
+    presents = distribute_presents(moves)
+    return len(presents)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 5183d84bf73b9701930d4308671e33f7a6dac505 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:55:45 +0100
Subject: [PATCH 011/100] 2015: d03: ex2: add input

---
 2015/d03/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d03/ex2/input

diff --git a/2015/d03/ex2/input b/2015/d03/ex2/input
new file mode 100644
index 0000000..03504fc
--- /dev/null
+++ b/2015/d03/ex2/input
@@ -0,0 +1 @@
+^><^>>>^<^v<v^^vv^><<^<><<vv^<>^<^v>^vv<>v><vv^^<>>^^^v<<vv><<^>^<^v<^>^v><<<v^<v<<<v<<vv<v<^><^>><>v>v^<<v^^<^v<><^>^<<^^^>v>>v^^<v>>^>vv><v>>^>>v^>^v>^<^^v>^>^^v<v>^^<v<>>v^^v><^><^<<>v^<^<^v<v>v^>>>v^v^>^<>^v<^^vv<v>^>^<>^^<vv^<><<v<^<^^>vv<>^>v<^>^v>v^>^v<>^><>><vv<>v^v<><>v^v>>>>v^^>^><^^<v<^><^<v>>^v^v<>v<<<^<<vvvv<<v^vv^>v^^^<^^^<v>>v<^v>>>>>v<^^^^>v<^<><v>>>>><v>>v^vvvv^^<v^<>^v<^v^>v><^>^v<<>>vv^>v>v^^>vv^<^vvv<>><>><><^^^<v<>^<^^^<v><^v>>v>^v<v^vv^<>^^^>v^^^v>>^v^^<^>>^>^<<v>>>^^<>>^vv>v^<^>>>><v<><><^^v<><<<<^^<>>^<vvv^><>v<v<<<<><v<<v>v<v^><vv<v^>^<^>v^^><^v>^^>v<>^v^<>^vv^><v^^vv>vvv>v>^<vv^>>^>>^>><>>>^^^^v<vv>^<>v^^><v^>^<>v<^^v><v<<><^v><>^^^^^v^v>>^^v><<><<vv>^^^^><^>v>><<<^v>v^^>^v^<^^v>v<^<<>>^v<<<v<<>>v<^v^><vv<v^v>v^<v>><v>^v<<<vv^>v<v>>v>>v><v><v^>v^^v>^v^>>>><>^>v>^v^>>>>v^<<vv<^v><<>v<v^<^^<<v<^v^^v^>vv><vv<v^<^>><^^>^<><^^<v<><^v^v^<^^>^<v><^<v>v^<<<^^v<v>^v>>><>^^>vv<<^v^<<<<^^>>>v>v<<<>^^>>>v>^>v>vv<<>^<^><v^>^^<^<v<<v<^>>^v^<vvv><>v^><<v>^^<v^vv^^^<vvv^<^>^>vv>><^v<^<<v<><<><<^^<><><vv>v>^<v>>^<>>^^v>vv^<^^v>><^vv^<<v^^><<>vv<v<><v<><v^^^v^v>^v<^<>v^^>><>^<^<v^<v^v^>v<<<^<<^>>>^^<^^v>v^<v>vvvv>v<>><^>^<<<<v^<v<>v^^^v<>v>^<v<<^^v^^<>^<<v^^<^<v>v>>v>>v^>^<vv<<<<<^<><>v><>>>v^>^v<^<><<v<^v^^<^<><^>^^^>^><>^><<vv>^<>vv<<v^v<<<<<>>>v<vv>^v>^>^>^<^><>v<><>>>^^<v>^<^v>>^<><v^><v^>>>v<v^^vvv^><v<v>v^>vvvv>>><^>v<>^^^>v>>v^<v<>v^>^<v^>^<<^>^>>v<<><<v^^>>v^<v^<^v^>^>v^><<^<v>v^<v>>^^<<v>v><<<^v^<>^<>^>>^<<v>^^<>^v<>v^>>><<v>><v^>^><v^<><v><>><v^<>vv>v^<^^^>v>^^<vv>>^v<><>>><>><^<>>v>v^^>^^<^^>^>>v>vv^^v<^<^v><vv<v<^>><<vvv<<><^>^v>^^^<<>v^<v<v><<v>^^v<<<>^^vv<^>vv>^>^<><<>vv<^>v^vv>^^^v><<^vv>^v<><v^^^^v^>vv^^<^<>^^v^<^vv<v<vv<>v>v^^<>^^>^^>^<><<^v>^><^^vvvv<><>^<v^^>v<>^><>v>><>vv^<<><<>><>v<^>^v>>^^v><<<>>^<^v^<v<<<v^>^^<^<><><^><<<<^<vv><v<<><vvv^^><vv>^<<vv<<<^v<>>><><>>v><<<v>vvvv^^vv<v>><<^v^vvv><><vv>v><>v<<<^<v^>><^^>v^<v>><v>^^^v^v>><<<v<^^>>^v<>v^<vv^^<<v<v>v<<<<^^^v^v<<>>>v>>vv>^^<><^v<v><>>v^>>>>>^>v^v^<^v^v^vvv>v<v<^>vv^<<v>vv>>v^^vv<^v>>>>vv<>v<>^^vv^<v>v^>>vvv<<<v<<^vv^^^^>v>v>^><<<^>v^><v<^<<<v>^v^^^><<><<<^^<^^<>^<v>^<v<<v<^^vv>v<^v><v><v<>^v<^<v<^<v^v><v>><v<v<<>^<v<>>><>^v^v<<^><v^<<v<v^>^>v><^>^vv^^<v<v<vv<v>^v^v^>^<<>>>>>v^<>^>v^vv^><<>>^^<>v^><v>^vvv^>v^v><>^><<>v>v<^<^><^^vv<<><>>v>>v><vv>>^v<<>^vv<>^vv>v>v>^>^>>><><<>v<v>^<<^v^^<<<><v>>vv<^<vv<vv^<<v<<^v><<>v<^^^<<^v^>^v>^^^v^v>>>v>v^v>^>^vv<^^<<vv^>^<<<vv>v^<><<^vvv^^><>vv^v>v>^><<^^^^vvv^<vvv>><^v<^>^<>>^<v<<vv>>><v>vv^<>><v^<v>^v>^>v>^<^<^^^<<vvvv^>>>>>>>v><vv>^<>^^v^><>><^v^^<v^v<<<<v^>><>v^v<vv<><^<<<<^>^^>vv>><^v<v^v<<>^vvv>v^^><^^<^<>>^^v^vv<>v<^<<<v^^^><v<vv<<>v>v<>^v^><v^vv^v^^v<^^v^^v><>v<^v>><<^<^v^>><<vv<<^>^<<v^<>^><>v><vv^v>>^<v<<<^>vv<^v>^>v<<v>^>>^>>v^<v<v>>^v<^v^v><<><>^><<<><v<vvvv<v^<v^v><>^<>^^^^v>^>^vvvvv>v>>v><<vv<<v<><<^><<^v><<v<<<v><vv<^>^v>>>>^v<^v<<>>^>^<<vv^<^>v>><<^>^>^v><><>^><<v<>v^><<^v^<^^><^^v^<<^v^^>>^v^<^><vv>v^^<<^^^<><>^>v^v>v^>^v^vv>^^>>>>^^<^>>>^^v<vv<><^^<vvv<^^^vv>v<v<v>><<<>^>^^>^>^v<<<<>>^<<>><v>>v>^^<^v<>v<>v^>v^><^<^^><v^^v>^^vv<v<<>><<vv<>>v>^<<<<v<<v>^><^^<^<^<v^<<^^v>^v<^>v^v^<v^vv^>^^><^>v^v>>^^v^><vv<v<v<v>>>>><<><v><v^v^<v^<^^<v<>^>v>v<>>>v>^^^^>><v^v^^v<<<>v^<<^<v>>>><^v^<<><v<>>v><><v<v^v>^v^^<v<^<^^v>><<vv<<vv><>>^>^>vv<^<>^vvv^v<v^^<>v^v>^^<<<<<>^v^>^<>v^^<>v^v<vv>^<>vv^<^vv>><v^^vvvvv>><<>v<vv^<^<vv^v^<>^^<v^<vv^<v^v^v<<^>^>^>^^>>>vvv>^>v>v>>>^>vv^><>^><>v>^^<v^>^><<v>><<<>>v<vvvv^>^v<^<>^<v>^<>^^<<><>^v<><>>>^vv<^<<^<^v>v<<<<<^^v<^v<><v<<><^>v>^v>>^v^><^^^^v<><><>vv^<>vv<^v<^^><v^<^><^^v^v^<^^<<><v>v<v<v^<<^v><>v^v<^>vvv><<^v>>v><><v<<^>>>v<^>>v>^<>><>^<v^v^<vv<<^>v<^^>^<^v<^<<^^v<>>^>^>^v^^v^v<v^^vv^<v>>v><vv^vv>v<>v^>v^^>^^>><v><v^<<><<>><<^^>><^v<v<><<><<><v<v^<^<v>>>><v^^v^^>>>^^^^^<<vv<^><>^<<<vv^^^>^><<<v<^v>^<v<^>^vvv<<>vv><<>v>v^v>>>>>^<>><^^^><<<<v><<vv>>>v<^<vv^v^<<v>>>>^^vvv>v<>><v>>>v>>^v^vvv<<>vvv<<^^^<>vv^^v<<>^^^>>^<^v^<^^>v^><v>>^<<^v<<vv<vv>v^>>^>v^><^><>^>>>vv>><^^^>vv<<^^vv><^<>^>^^<^<>>^vv^>>^v><>v^>>><<<^^<^>^>v<^>^<^^<>>><^^<>^v^<<vvv<v><>vvv><v>v^v<<^<v>^^><<^vv^v>v>v<<^v^<<<>^><><vvv>v>^vv^v<>vv^>^^<^>^>v^^<vv^>v><v<<<><>>^v<^<><><^<v^^<<^<v>vv<><<>v^<v^>^>^^<><<>^<^<<v^^v<v^<><<>v>><^<<>^>^v^v<v^v><^>>^v<^>v<<>^^^<^v>>>^<v>vvvv<<v^<^^>vvvv>v<>v<v><vvvvv>^<><>vvv<>^<<>^>>>>v^<^<><^v>v^>>v><>^><<v^>^<<>^>^v^<v^^>>^v><v>^<v><>v^<^^>v>^>>>v^v>>>^<>^<>>>>>v>>vv^v<><<<><><v><<vv<<v<><>>vv<^<vv>^v<<>v^v<^v<><v>>^v>>vvv^^v>>v>^>^>v><v><^>^^<<>^v<^<<<<^>v<^>>v^<^v>^v<<>^>^vvv<^^vv>^vv>vv<>>v>v<v>>v^<<<<<^^v^>v>^<<<v^v>>v<v><vvv><v>^<vv><<>>^<^>^^<>>>>^<^v<>v^^>^<^^v<^><>><v>>^v^vv<^v<^><<vvv<>><>><^^>^<^v^<^<>v<<<^v>v^^^<>v^<v^>^v^>><>^^<v<^><<^^v^<>^<^vv>>><^v><v^>vv<^v<<<v^>>v>v^v>^<v>v<^<>v^vvv>^vv<<<<v><^><v>>^^>><^v><<^>v^^<<v^^<^<><<<<>^<v<^v^>v<<^^>v<<<<<vvv<v<^>^>^>^>>^>>>v^<<v>>^^v><vv<^v<v<^^^>>>^vvv<^v<>>>vv>^^><^v>vv^>>v>v^<>^<vv>^>^<<^>^^^>>^vv>^^>vvvv<>>^^^^>>>v>v^^>vv>vv^<<>^><^<v^vvvv><v<><v>><<<v<v<<^v><vv^vv^<>>>^>^<v<^v<>><^<vv^^><v>v^>v^<><v^vvv>^>v^^v^>^^>v<<<<^<<^>>v>v^^^<<<v>>>^^v>v<v><<<<^^^v>^vv^>><>^v<v<<^^<<<<><>>>v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\ No newline at end of file

From 6d318ff84d4149c1a48500a1cd7f3a1fa5f139cc Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:55:56 +0100
Subject: [PATCH 012/100] 2015: d03: ex2: add solution

---
 2015/d03/ex2/ex2.py | 55 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100755 2015/d03/ex2/ex2.py

diff --git a/2015/d03/ex2/ex2.py b/2015/d03/ex2/ex2.py
new file mode 100755
index 0000000..b81e49e
--- /dev/null
+++ b/2015/d03/ex2/ex2.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+
+import enum
+import sys
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+class Direction(enum.StrEnum):
+    NORTH = "^"
+    EAST = ">"
+    SOUTH = "v"
+    WEST = "<"
+
+    def apply(self, p: Point) -> Point:
+        match self:
+            case Direction.NORTH:
+                dx, dy = -1, 0
+            case Direction.EAST:
+                dx, dy = 0, 1
+            case Direction.SOUTH:
+                dx, dy = 1, 0
+            case Direction.WEST:
+                dx, dy = 0, -1
+        return Point(p.x + dx, p.y + dy)
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Direction]:
+        return [Direction(c) for c in input.strip()]
+
+    def distribute_presents(moves: list[Direction]) -> set[Point]:
+        pos = Point(0, 0)
+        seen = {pos}
+        for move in moves:
+            pos = move.apply(pos)
+            seen.add(pos)
+        return seen
+
+    moves = parse(input)
+    presents = distribute_presents(moves[::2]) | distribute_presents(moves[1::2])
+    return len(presents)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 6dcb0c3c3bcaf882a8638df524dcd53a368435f0 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:59:09 +0100
Subject: [PATCH 013/100] 2015: d04: ex1: add input

---
 2015/d04/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d04/ex1/input

diff --git a/2015/d04/ex1/input b/2015/d04/ex1/input
new file mode 100644
index 0000000..d75e0dc
--- /dev/null
+++ b/2015/d04/ex1/input
@@ -0,0 +1 @@
+yzbqklnj

From b3642638385d3c9cbe579d980b630382b6aab13b Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:59:17 +0100
Subject: [PATCH 014/100] 2015: d04: ex1: add solution

---
 2015/d04/ex1/ex1.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 2015/d04/ex1/ex1.py

diff --git a/2015/d04/ex1/ex1.py b/2015/d04/ex1/ex1.py
new file mode 100755
index 0000000..47e0280
--- /dev/null
+++ b/2015/d04/ex1/ex1.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import hashlib
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    key = input.strip()
+    for i in itertools.count(1):
+        hash = hashlib.md5((key + str(i)).encode()).hexdigest()
+        if hash.startswith("00000"):
+            return i
+    assert False  # Sanity check
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 5eda64047ccaa3dd667a2d51402050aec4a83fec Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:59:22 +0100
Subject: [PATCH 015/100] 2015: d04: ex2: add input

---
 2015/d04/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d04/ex2/input

diff --git a/2015/d04/ex2/input b/2015/d04/ex2/input
new file mode 100644
index 0000000..d75e0dc
--- /dev/null
+++ b/2015/d04/ex2/input
@@ -0,0 +1 @@
+yzbqklnj

From b46027ca9e41acf2a0d8b41d45ad06886c1cf335 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 00:59:37 +0100
Subject: [PATCH 016/100] 2015: d04: ex2: add solution

---
 2015/d04/ex2/ex2.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 2015/d04/ex2/ex2.py

diff --git a/2015/d04/ex2/ex2.py b/2015/d04/ex2/ex2.py
new file mode 100755
index 0000000..8ec99f7
--- /dev/null
+++ b/2015/d04/ex2/ex2.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import hashlib
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    key = input.strip()
+    for i in itertools.count(1):
+        hash = hashlib.md5((key + str(i)).encode()).hexdigest()
+        if hash.startswith("000000"):
+            return i
+    assert False  # Sanity check
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From a1c3ca238158a5aad0ba6ea4079458c82e519e49 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:19:38 +0100
Subject: [PATCH 017/100] 2015: d05: ex1: add input

---
 2015/d05/ex1/input | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1000 insertions(+)
 create mode 100644 2015/d05/ex1/input

diff --git a/2015/d05/ex1/input b/2015/d05/ex1/input
new file mode 100644
index 0000000..a9b6e77
--- /dev/null
+++ b/2015/d05/ex1/input
@@ -0,0 +1,1000 @@
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From 5134d471d9aafbfbadd74109047d6aab1dc486a1 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:19:44 +0100
Subject: [PATCH 018/100] 2015: d05: ex1: add solution

---
 2015/d05/ex1/ex1.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 2015/d05/ex1/ex1.py

diff --git a/2015/d05/ex1/ex1.py b/2015/d05/ex1/ex1.py
new file mode 100755
index 0000000..48cf3f8
--- /dev/null
+++ b/2015/d05/ex1/ex1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+
+
+def solve(input: str) -> int:
+    def is_nice(input: str) -> bool:
+        counts = collections.Counter(input)
+        if sum(counts[c] for c in "aeiou") < 3:
+            return False
+        if not any((c + c) in input for c in (chr(ord("a") + i) for i in range(26))):
+            return False
+        for bad in ("ab", "cd", "pq", "xy"):
+            if bad in input:
+                return False
+        return True
+
+    return sum(map(is_nice, input.splitlines()))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 0cc937849a2a86883ee63f00b504933c59d8c178 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:19:50 +0100
Subject: [PATCH 019/100] 2015: d05: ex2: add input

---
 2015/d05/ex2/input | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1000 insertions(+)
 create mode 100644 2015/d05/ex2/input

diff --git a/2015/d05/ex2/input b/2015/d05/ex2/input
new file mode 100644
index 0000000..a9b6e77
--- /dev/null
+++ b/2015/d05/ex2/input
@@ -0,0 +1,1000 @@
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From e3ed06e2464d98e66d0ebcddef195494f3d978d4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:19:55 +0100
Subject: [PATCH 020/100] 2015: d05: ex2: add solution

---
 2015/d05/ex2/ex2.py | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100755 2015/d05/ex2/ex2.py

diff --git a/2015/d05/ex2/ex2.py b/2015/d05/ex2/ex2.py
new file mode 100755
index 0000000..8245c65
--- /dev/null
+++ b/2015/d05/ex2/ex2.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+from collections.abc import Iterable, Iterator
+from typing import TypeVar
+
+T = TypeVar("T")
+
+
+def sliding_window(iterable: Iterable[T], n: int) -> Iterator[tuple[T, ...]]:
+    iterator = iter(iterable)
+    window = collections.deque(itertools.islice(iterator, n - 1), maxlen=n)
+    for x in iterator:
+        window.append(x)
+        yield tuple(window)
+
+
+def solve(input: str) -> int:
+    def is_nice(input: str) -> bool:
+        if not any(
+            ab in rest
+            for ab, rest in (
+                (input[i : i + 2], input[i + 2 :]) for i in range(len(input) - 1)
+            )
+        ):
+            return False
+        if not any(a == c for a, _, c in sliding_window(input, 3)):
+            return False
+        return True
+
+    return sum(map(is_nice, input.splitlines()))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 7b51b229f31d60680ff9b5a179235366a09e0d79 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:43:57 +0100
Subject: [PATCH 021/100] 2015: d06: ex1: add input

---
 2015/d06/ex1/input | 300 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 300 insertions(+)
 create mode 100644 2015/d06/ex1/input

diff --git a/2015/d06/ex1/input b/2015/d06/ex1/input
new file mode 100644
index 0000000..df10465
--- /dev/null
+++ b/2015/d06/ex1/input
@@ -0,0 +1,300 @@
+turn on 489,959 through 759,964
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From 6808196ffe8689657258018f15655adf0dfbf570 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:44:02 +0100
Subject: [PATCH 022/100] 2015: d06: ex1: add solution

---
 2015/d06/ex1/ex1.py | 70 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100755 2015/d06/ex1/ex1.py

diff --git a/2015/d06/ex1/ex1.py b/2015/d06/ex1/ex1.py
new file mode 100755
index 0000000..c39cb14
--- /dev/null
+++ b/2015/d06/ex1/ex1.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+
+import enum
+import itertools
+import sys
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+class Op(enum.StrEnum):
+    TURN_ON = "on"
+    TOGGLE = "toggle"
+    TURN_OFF = "off"
+
+
+class Instruction(NamedTuple):
+    op: Op
+    a: Point
+    b: Point
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        split_input = input.split()
+        raw_a, raw_b = split_input[-3], split_input[-1]
+        op = Op(split_input[1]) if split_input[0] == "turn" else Op(split_input[0])
+        return Instruction(
+            op,
+            Point(*map(int, raw_a.split(","))),
+            Point(*map(int, raw_b.split(","))),
+        )
+
+    def apply(self, screen: set[Point]) -> set[Point]:
+        points = {
+            Point(x, y)
+            for x, y in itertools.product(
+                range(self.a.x, self.b.x + 1),
+                range(self.a.y, self.b.y + 1),
+            )
+        }
+        match self.op:
+            case Op.TURN_ON:
+                return screen | points
+            case Op.TOGGLE:
+                return screen ^ points
+            case Op.TURN_OFF:
+                return screen - points
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Instruction]:
+        return [Instruction.from_str(line) for line in input.splitlines()]
+
+    instructions = parse(input)
+    screen: set[Point] = set()
+    for instr in instructions:
+        screen = instr.apply(screen)
+    return len(screen)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From a3feed2595fe8e5265b231a189b6fbfbd639e9a8 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:44:08 +0100
Subject: [PATCH 023/100] 2015: d06: ex2: add input

---
 2015/d06/ex2/input | 300 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 300 insertions(+)
 create mode 100644 2015/d06/ex2/input

diff --git a/2015/d06/ex2/input b/2015/d06/ex2/input
new file mode 100644
index 0000000..df10465
--- /dev/null
+++ b/2015/d06/ex2/input
@@ -0,0 +1,300 @@
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+toggle 628,958 through 811,992

From 211b4ef9109d9b812341a3dfcafed57f086166a3 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 01:44:14 +0100
Subject: [PATCH 024/100] 2015: d06: ex2: add solution

---
 2015/d06/ex2/ex2.py | 71 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 2015/d06/ex2/ex2.py

diff --git a/2015/d06/ex2/ex2.py b/2015/d06/ex2/ex2.py
new file mode 100755
index 0000000..6da18af
--- /dev/null
+++ b/2015/d06/ex2/ex2.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python
+
+import collections
+import enum
+import itertools
+import sys
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+class Op(enum.StrEnum):
+    TURN_ON = "on"
+    TOGGLE = "toggle"
+    TURN_OFF = "off"
+
+
+class Instruction(NamedTuple):
+    op: Op
+    a: Point
+    b: Point
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        split_input = input.split()
+        raw_a, raw_b = split_input[-3], split_input[-1]
+        op = Op(split_input[1]) if split_input[0] == "turn" else Op(split_input[0])
+        return Instruction(
+            op,
+            Point(*map(int, raw_a.split(","))),
+            Point(*map(int, raw_b.split(","))),
+        )
+
+    def apply(self, screen: collections.Counter[Point]) -> collections.Counter[Point]:
+        points = collections.Counter(
+            Point(x, y)
+            for x, y in itertools.product(
+                range(self.a.x, self.b.x + 1),
+                range(self.a.y, self.b.y + 1),
+            )
+        )
+        match self.op:
+            case Op.TURN_ON:
+                return screen + points
+            case Op.TOGGLE:
+                return screen + points + points
+            case Op.TURN_OFF:
+                return screen - points
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Instruction]:
+        return [Instruction.from_str(line) for line in input.splitlines()]
+
+    instructions = parse(input)
+    screen: collections.Counter[Point] = collections.Counter()
+    for instr in instructions:
+        screen = instr.apply(screen)
+    return screen.total()
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 06950b6c721fbd15195adc5c03f83cc46c56ee7f Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:24:03 +0100
Subject: [PATCH 025/100] 2015: d07: ex1: add input

---
 2015/d07/ex1/input | 339 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 339 insertions(+)
 create mode 100644 2015/d07/ex1/input

diff --git a/2015/d07/ex1/input b/2015/d07/ex1/input
new file mode 100644
index 0000000..0fd2859
--- /dev/null
+++ b/2015/d07/ex1/input
@@ -0,0 +1,339 @@
+lf AND lq -> ls
+iu RSHIFT 1 -> jn
+bo OR bu -> bv
+gj RSHIFT 1 -> hc
+et RSHIFT 2 -> eu
+bv AND bx -> by
+is OR it -> iu
+b OR n -> o
+gf OR ge -> gg
+NOT kt -> ku
+ea AND eb -> ed
+kl OR kr -> ks
+hi AND hk -> hl
+au AND av -> ax
+lf RSHIFT 2 -> lg
+dd RSHIFT 3 -> df
+eu AND fa -> fc
+df AND dg -> di
+ip LSHIFT 15 -> it
+NOT el -> em
+et OR fe -> ff
+fj LSHIFT 15 -> fn
+t OR s -> u
+ly OR lz -> ma
+ko AND kq -> kr
+NOT fx -> fy
+et RSHIFT 1 -> fm
+eu OR fa -> fb
+dd RSHIFT 2 -> de
+NOT go -> gp
+kb AND kd -> ke
+hg OR hh -> hi
+jm LSHIFT 1 -> kg
+NOT cn -> co
+jp RSHIFT 2 -> jq
+jp RSHIFT 5 -> js
+1 AND io -> ip
+eo LSHIFT 15 -> es
+1 AND jj -> jk
+g AND i -> j
+ci RSHIFT 3 -> ck
+gn AND gp -> gq
+fs AND fu -> fv
+lj AND ll -> lm
+jk LSHIFT 15 -> jo
+iu RSHIFT 3 -> iw
+NOT ii -> ij
+1 AND cc -> cd
+bn RSHIFT 3 -> bp
+NOT gw -> gx
+NOT ft -> fu
+jn OR jo -> jp
+iv OR jb -> jc
+hv OR hu -> hw
+19138 -> b
+gj RSHIFT 5 -> gm
+hq AND hs -> ht
+dy RSHIFT 1 -> er
+ao OR an -> ap
+ld OR le -> lf
+bk LSHIFT 1 -> ce
+bz AND cb -> cc
+bi LSHIFT 15 -> bm
+il AND in -> io
+af AND ah -> ai
+as RSHIFT 1 -> bl
+lf RSHIFT 3 -> lh
+er OR es -> et
+NOT ax -> ay
+ci RSHIFT 1 -> db
+et AND fe -> fg
+lg OR lm -> ln
+k AND m -> n
+hz RSHIFT 2 -> ia
+kh LSHIFT 1 -> lb
+NOT ey -> ez
+NOT di -> dj
+dz OR ef -> eg
+lx -> a
+NOT iz -> ja
+gz LSHIFT 15 -> hd
+ce OR cd -> cf
+fq AND fr -> ft
+at AND az -> bb
+ha OR gz -> hb
+fp AND fv -> fx
+NOT gb -> gc
+ia AND ig -> ii
+gl OR gm -> gn
+0 -> c
+NOT ca -> cb
+bn RSHIFT 1 -> cg
+c LSHIFT 1 -> t
+iw OR ix -> iy
+kg OR kf -> kh
+dy OR ej -> ek
+km AND kn -> kp
+NOT fc -> fd
+hz RSHIFT 3 -> ib
+NOT dq -> dr
+NOT fg -> fh
+dy RSHIFT 2 -> dz
+kk RSHIFT 2 -> kl
+1 AND fi -> fj
+NOT hr -> hs
+jp RSHIFT 1 -> ki
+bl OR bm -> bn
+1 AND gy -> gz
+gr AND gt -> gu
+db OR dc -> dd
+de OR dk -> dl
+as RSHIFT 5 -> av
+lf RSHIFT 5 -> li
+hm AND ho -> hp
+cg OR ch -> ci
+gj AND gu -> gw
+ge LSHIFT 15 -> gi
+e OR f -> g
+fp OR fv -> fw
+fb AND fd -> fe
+cd LSHIFT 15 -> ch
+b RSHIFT 1 -> v
+at OR az -> ba
+bn RSHIFT 2 -> bo
+lh AND li -> lk
+dl AND dn -> do
+eg AND ei -> ej
+ex AND ez -> fa
+NOT kp -> kq
+NOT lk -> ll
+x AND ai -> ak
+jp OR ka -> kb
+NOT jd -> je
+iy AND ja -> jb
+jp RSHIFT 3 -> jr
+fo OR fz -> ga
+df OR dg -> dh
+gj RSHIFT 2 -> gk
+gj OR gu -> gv
+NOT jh -> ji
+ap LSHIFT 1 -> bj
+NOT ls -> lt
+ir LSHIFT 1 -> jl
+bn AND by -> ca
+lv LSHIFT 15 -> lz
+ba AND bc -> bd
+cy LSHIFT 15 -> dc
+ln AND lp -> lq
+x RSHIFT 1 -> aq
+gk OR gq -> gr
+NOT kx -> ky
+jg AND ji -> jj
+bn OR by -> bz
+fl LSHIFT 1 -> gf
+bp OR bq -> br
+he OR hp -> hq
+et RSHIFT 5 -> ew
+iu RSHIFT 2 -> iv
+gl AND gm -> go
+x OR ai -> aj
+hc OR hd -> he
+lg AND lm -> lo
+lh OR li -> lj
+da LSHIFT 1 -> du
+fo RSHIFT 2 -> fp
+gk AND gq -> gs
+bj OR bi -> bk
+lf OR lq -> lr
+cj AND cp -> cr
+hu LSHIFT 15 -> hy
+1 AND bh -> bi
+fo RSHIFT 3 -> fq
+NOT lo -> lp
+hw LSHIFT 1 -> iq
+dd RSHIFT 1 -> dw
+dt LSHIFT 15 -> dx
+dy AND ej -> el
+an LSHIFT 15 -> ar
+aq OR ar -> as
+1 AND r -> s
+fw AND fy -> fz
+NOT im -> in
+et RSHIFT 3 -> ev
+1 AND ds -> dt
+ec AND ee -> ef
+NOT ak -> al
+jl OR jk -> jm
+1 AND en -> eo
+lb OR la -> lc
+iu AND jf -> jh
+iu RSHIFT 5 -> ix
+bo AND bu -> bw
+cz OR cy -> da
+iv AND jb -> jd
+iw AND ix -> iz
+lf RSHIFT 1 -> ly
+iu OR jf -> jg
+NOT dm -> dn
+lw OR lv -> lx
+gg LSHIFT 1 -> ha
+lr AND lt -> lu
+fm OR fn -> fo
+he RSHIFT 3 -> hg
+aj AND al -> am
+1 AND kz -> la
+dy RSHIFT 5 -> eb
+jc AND je -> jf
+cm AND co -> cp
+gv AND gx -> gy
+ev OR ew -> ex
+jp AND ka -> kc
+fk OR fj -> fl
+dy RSHIFT 3 -> ea
+NOT bs -> bt
+NOT ag -> ah
+dz AND ef -> eh
+cf LSHIFT 1 -> cz
+NOT cv -> cw
+1 AND cx -> cy
+de AND dk -> dm
+ck AND cl -> cn
+x RSHIFT 5 -> aa
+dv LSHIFT 1 -> ep
+he RSHIFT 2 -> hf
+NOT bw -> bx
+ck OR cl -> cm
+bp AND bq -> bs
+as OR bd -> be
+he AND hp -> hr
+ev AND ew -> ey
+1 AND lu -> lv
+kk RSHIFT 3 -> km
+b AND n -> p
+NOT kc -> kd
+lc LSHIFT 1 -> lw
+km OR kn -> ko
+id AND if -> ig
+ih AND ij -> ik
+jr AND js -> ju
+ci RSHIFT 5 -> cl
+hz RSHIFT 1 -> is
+1 AND ke -> kf
+NOT gs -> gt
+aw AND ay -> az
+x RSHIFT 2 -> y
+ab AND ad -> ae
+ff AND fh -> fi
+ci AND ct -> cv
+eq LSHIFT 1 -> fk
+gj RSHIFT 3 -> gl
+u LSHIFT 1 -> ao
+NOT bb -> bc
+NOT hj -> hk
+kw AND ky -> kz
+as AND bd -> bf
+dw OR dx -> dy
+br AND bt -> bu
+kk AND kv -> kx
+ep OR eo -> eq
+he RSHIFT 1 -> hx
+ki OR kj -> kk
+NOT ju -> jv
+ek AND em -> en
+kk RSHIFT 5 -> kn
+NOT eh -> ei
+hx OR hy -> hz
+ea OR eb -> ec
+s LSHIFT 15 -> w
+fo RSHIFT 1 -> gh
+kk OR kv -> kw
+bn RSHIFT 5 -> bq
+NOT ed -> ee
+1 AND ht -> hu
+cu AND cw -> cx
+b RSHIFT 5 -> f
+kl AND kr -> kt
+iq OR ip -> ir
+ci RSHIFT 2 -> cj
+cj OR cp -> cq
+o AND q -> r
+dd RSHIFT 5 -> dg
+b RSHIFT 2 -> d
+ks AND ku -> kv
+b RSHIFT 3 -> e
+d OR j -> k
+NOT p -> q
+NOT cr -> cs
+du OR dt -> dv
+kf LSHIFT 15 -> kj
+NOT ac -> ad
+fo RSHIFT 5 -> fr
+hz OR ik -> il
+jx AND jz -> ka
+gh OR gi -> gj
+kk RSHIFT 1 -> ld
+hz RSHIFT 5 -> ic
+as RSHIFT 2 -> at
+NOT jy -> jz
+1 AND am -> an
+ci OR ct -> cu
+hg AND hh -> hj
+jq OR jw -> jx
+v OR w -> x
+la LSHIFT 15 -> le
+dh AND dj -> dk
+dp AND dr -> ds
+jq AND jw -> jy
+au OR av -> aw
+NOT bf -> bg
+z OR aa -> ab
+ga AND gc -> gd
+hz AND ik -> im
+jt AND jv -> jw
+z AND aa -> ac
+jr OR js -> jt
+hb LSHIFT 1 -> hv
+hf OR hl -> hm
+ib OR ic -> id
+fq OR fr -> fs
+cq AND cs -> ct
+ia OR ig -> ih
+dd OR do -> dp
+d AND j -> l
+ib AND ic -> ie
+as RSHIFT 3 -> au
+be AND bg -> bh
+dd AND do -> dq
+NOT l -> m
+1 AND gd -> ge
+y AND ae -> ag
+fo AND fz -> gb
+NOT ie -> if
+e AND f -> h
+x RSHIFT 3 -> z
+y OR ae -> af
+hf AND hl -> hn
+NOT h -> i
+NOT hn -> ho
+he RSHIFT 5 -> hh

From de56afd64b1278bdb48bc74f64e7328ec3fb9642 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:24:14 +0100
Subject: [PATCH 026/100] 2015: d07: ex1: add solution

---
 2015/d07/ex1/ex1.py | 121 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100755 2015/d07/ex1/ex1.py

diff --git a/2015/d07/ex1/ex1.py b/2015/d07/ex1/ex1.py
new file mode 100755
index 0000000..c70461c
--- /dev/null
+++ b/2015/d07/ex1/ex1.py
@@ -0,0 +1,121 @@
+#!/usr/bin/env python
+
+import enum
+import operator
+import sys
+from typing import NamedTuple
+
+
+class Op(enum.StrEnum):
+    AND = "AND_"
+    OR = "OR_"
+    LSHIFT = "LSHIFT"
+    RSHIFT = "RSHIFT"
+    NOT = "NOT"
+    IDENTITY = ""  # For the output to `a`, which has no operator
+
+    def apply(self, lhs: int, rhs: int | None) -> int:
+        if self == Op.IDENTITY:
+            assert rhs is None
+            return lhs
+        if self == Op.NOT:
+            assert rhs is None
+            return ~lhs
+        assert rhs is not None
+        return getattr(operator, self.lower())(lhs, rhs)
+
+
+class Instruction(NamedTuple):
+    op: Op
+    lhs: str
+    rhs: str | None = None
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        split_input = input.split()
+        if len(split_input) == 1:
+            op = ""
+            lhs = split_input[0]
+            rest = []
+        elif split_input[0] == "NOT":
+            op, lhs, *rest = split_input
+        else:
+            lhs, op, *rest = split_input
+        # Hacky way to match with the function in the `operator` module...
+        if op in ("AND", "OR"):
+            op = op + "_"
+        return cls(Op(op), lhs, *rest)
+
+
+Circuit = dict[str, Instruction | int]
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, Instruction | int]:
+        raw_instr, wire = input.split(" -> ")
+        if raw_instr.isdigit():
+            return wire, int(raw_instr)
+        return wire, Instruction.from_str(raw_instr)
+
+    def parse(input: str) -> Circuit:
+        return {wire: val for wire, val in map(parse_line, input.splitlines())}
+
+    def dependencies(circuit: Circuit) -> dict[str, set[str]]:
+        res: dict[str, set[str]] = {wire: set() for wire in circuit.keys()}
+        for wire, val in circuit.items():
+            if isinstance(val, int):
+                continue
+            for dep in (val.lhs, val.rhs):
+                if dep is None:
+                    continue
+                if dep.isdigit():
+                    continue
+                res[wire].add(dep)
+        return res
+
+    def topo_sort(dep_graph: dict[str, set[str]]) -> list[str]:
+        res: list[str] = []
+
+        queue = {n for n, deps in dep_graph.items() if not deps}
+        seen: set[str] = set()
+
+        while queue:
+            node = queue.pop()
+
+            res.append(node)
+            seen.add(node)
+            # Iterate over all nodes as we don't have information on children
+            for child, deps in dep_graph.items():
+                if child in seen:
+                    continue
+                if deps - seen:
+                    continue
+                queue.add(child)
+
+        return res
+
+    def run(circuit: Circuit) -> dict[str, int]:
+        res: dict[str, int] = {}
+        for wire in topo_sort(dependencies(circuit)):
+            match circuit[wire]:
+                case int(n):
+                    res[wire] = n
+                case Instruction(op, lhs, rhs):
+                    resolve = lambda v: int(v) if v.isdigit() else res[v]
+                    lhs_n = resolve(lhs)
+                    rhs_n = None if rhs is None else resolve(rhs)
+                    res[wire] = op.apply(lhs_n, rhs_n)
+        return res
+
+    circuit = parse(input)
+    wires = run(circuit)
+    return wires["a"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 8bb151fd6a1144615f7bfac894ec6be097ec20d6 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:24:20 +0100
Subject: [PATCH 027/100] 2015: d07: ex2: add input

---
 2015/d07/ex2/input | 339 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 339 insertions(+)
 create mode 100644 2015/d07/ex2/input

diff --git a/2015/d07/ex2/input b/2015/d07/ex2/input
new file mode 100644
index 0000000..0fd2859
--- /dev/null
+++ b/2015/d07/ex2/input
@@ -0,0 +1,339 @@
+lf AND lq -> ls
+iu RSHIFT 1 -> jn
+bo OR bu -> bv
+gj RSHIFT 1 -> hc
+et RSHIFT 2 -> eu
+bv AND bx -> by
+is OR it -> iu
+b OR n -> o
+gf OR ge -> gg
+NOT kt -> ku
+ea AND eb -> ed
+kl OR kr -> ks
+hi AND hk -> hl
+au AND av -> ax
+lf RSHIFT 2 -> lg
+dd RSHIFT 3 -> df
+eu AND fa -> fc
+df AND dg -> di
+ip LSHIFT 15 -> it
+NOT el -> em
+et OR fe -> ff
+fj LSHIFT 15 -> fn
+t OR s -> u
+ly OR lz -> ma
+ko AND kq -> kr
+NOT fx -> fy
+et RSHIFT 1 -> fm
+eu OR fa -> fb
+dd RSHIFT 2 -> de
+NOT go -> gp
+kb AND kd -> ke
+hg OR hh -> hi
+jm LSHIFT 1 -> kg
+NOT cn -> co
+jp RSHIFT 2 -> jq
+jp RSHIFT 5 -> js
+1 AND io -> ip
+eo LSHIFT 15 -> es
+1 AND jj -> jk
+g AND i -> j
+ci RSHIFT 3 -> ck
+gn AND gp -> gq
+fs AND fu -> fv
+lj AND ll -> lm
+jk LSHIFT 15 -> jo
+iu RSHIFT 3 -> iw
+NOT ii -> ij
+1 AND cc -> cd
+bn RSHIFT 3 -> bp
+NOT gw -> gx
+NOT ft -> fu
+jn OR jo -> jp
+iv OR jb -> jc
+hv OR hu -> hw
+19138 -> b
+gj RSHIFT 5 -> gm
+hq AND hs -> ht
+dy RSHIFT 1 -> er
+ao OR an -> ap
+ld OR le -> lf
+bk LSHIFT 1 -> ce
+bz AND cb -> cc
+bi LSHIFT 15 -> bm
+il AND in -> io
+af AND ah -> ai
+as RSHIFT 1 -> bl
+lf RSHIFT 3 -> lh
+er OR es -> et
+NOT ax -> ay
+ci RSHIFT 1 -> db
+et AND fe -> fg
+lg OR lm -> ln
+k AND m -> n
+hz RSHIFT 2 -> ia
+kh LSHIFT 1 -> lb
+NOT ey -> ez
+NOT di -> dj
+dz OR ef -> eg
+lx -> a
+NOT iz -> ja
+gz LSHIFT 15 -> hd
+ce OR cd -> cf
+fq AND fr -> ft
+at AND az -> bb
+ha OR gz -> hb
+fp AND fv -> fx
+NOT gb -> gc
+ia AND ig -> ii
+gl OR gm -> gn
+0 -> c
+NOT ca -> cb
+bn RSHIFT 1 -> cg
+c LSHIFT 1 -> t
+iw OR ix -> iy
+kg OR kf -> kh
+dy OR ej -> ek
+km AND kn -> kp
+NOT fc -> fd
+hz RSHIFT 3 -> ib
+NOT dq -> dr
+NOT fg -> fh
+dy RSHIFT 2 -> dz
+kk RSHIFT 2 -> kl
+1 AND fi -> fj
+NOT hr -> hs
+jp RSHIFT 1 -> ki
+bl OR bm -> bn
+1 AND gy -> gz
+gr AND gt -> gu
+db OR dc -> dd
+de OR dk -> dl
+as RSHIFT 5 -> av
+lf RSHIFT 5 -> li
+hm AND ho -> hp
+cg OR ch -> ci
+gj AND gu -> gw
+ge LSHIFT 15 -> gi
+e OR f -> g
+fp OR fv -> fw
+fb AND fd -> fe
+cd LSHIFT 15 -> ch
+b RSHIFT 1 -> v
+at OR az -> ba
+bn RSHIFT 2 -> bo
+lh AND li -> lk
+dl AND dn -> do
+eg AND ei -> ej
+ex AND ez -> fa
+NOT kp -> kq
+NOT lk -> ll
+x AND ai -> ak
+jp OR ka -> kb
+NOT jd -> je
+iy AND ja -> jb
+jp RSHIFT 3 -> jr
+fo OR fz -> ga
+df OR dg -> dh
+gj RSHIFT 2 -> gk
+gj OR gu -> gv
+NOT jh -> ji
+ap LSHIFT 1 -> bj
+NOT ls -> lt
+ir LSHIFT 1 -> jl
+bn AND by -> ca
+lv LSHIFT 15 -> lz
+ba AND bc -> bd
+cy LSHIFT 15 -> dc
+ln AND lp -> lq
+x RSHIFT 1 -> aq
+gk OR gq -> gr
+NOT kx -> ky
+jg AND ji -> jj
+bn OR by -> bz
+fl LSHIFT 1 -> gf
+bp OR bq -> br
+he OR hp -> hq
+et RSHIFT 5 -> ew
+iu RSHIFT 2 -> iv
+gl AND gm -> go
+x OR ai -> aj
+hc OR hd -> he
+lg AND lm -> lo
+lh OR li -> lj
+da LSHIFT 1 -> du
+fo RSHIFT 2 -> fp
+gk AND gq -> gs
+bj OR bi -> bk
+lf OR lq -> lr
+cj AND cp -> cr
+hu LSHIFT 15 -> hy
+1 AND bh -> bi
+fo RSHIFT 3 -> fq
+NOT lo -> lp
+hw LSHIFT 1 -> iq
+dd RSHIFT 1 -> dw
+dt LSHIFT 15 -> dx
+dy AND ej -> el
+an LSHIFT 15 -> ar
+aq OR ar -> as
+1 AND r -> s
+fw AND fy -> fz
+NOT im -> in
+et RSHIFT 3 -> ev
+1 AND ds -> dt
+ec AND ee -> ef
+NOT ak -> al
+jl OR jk -> jm
+1 AND en -> eo
+lb OR la -> lc
+iu AND jf -> jh
+iu RSHIFT 5 -> ix
+bo AND bu -> bw
+cz OR cy -> da
+iv AND jb -> jd
+iw AND ix -> iz
+lf RSHIFT 1 -> ly
+iu OR jf -> jg
+NOT dm -> dn
+lw OR lv -> lx
+gg LSHIFT 1 -> ha
+lr AND lt -> lu
+fm OR fn -> fo
+he RSHIFT 3 -> hg
+aj AND al -> am
+1 AND kz -> la
+dy RSHIFT 5 -> eb
+jc AND je -> jf
+cm AND co -> cp
+gv AND gx -> gy
+ev OR ew -> ex
+jp AND ka -> kc
+fk OR fj -> fl
+dy RSHIFT 3 -> ea
+NOT bs -> bt
+NOT ag -> ah
+dz AND ef -> eh
+cf LSHIFT 1 -> cz
+NOT cv -> cw
+1 AND cx -> cy
+de AND dk -> dm
+ck AND cl -> cn
+x RSHIFT 5 -> aa
+dv LSHIFT 1 -> ep
+he RSHIFT 2 -> hf
+NOT bw -> bx
+ck OR cl -> cm
+bp AND bq -> bs
+as OR bd -> be
+he AND hp -> hr
+ev AND ew -> ey
+1 AND lu -> lv
+kk RSHIFT 3 -> km
+b AND n -> p
+NOT kc -> kd
+lc LSHIFT 1 -> lw
+km OR kn -> ko
+id AND if -> ig
+ih AND ij -> ik
+jr AND js -> ju
+ci RSHIFT 5 -> cl
+hz RSHIFT 1 -> is
+1 AND ke -> kf
+NOT gs -> gt
+aw AND ay -> az
+x RSHIFT 2 -> y
+ab AND ad -> ae
+ff AND fh -> fi
+ci AND ct -> cv
+eq LSHIFT 1 -> fk
+gj RSHIFT 3 -> gl
+u LSHIFT 1 -> ao
+NOT bb -> bc
+NOT hj -> hk
+kw AND ky -> kz
+as AND bd -> bf
+dw OR dx -> dy
+br AND bt -> bu
+kk AND kv -> kx
+ep OR eo -> eq
+he RSHIFT 1 -> hx
+ki OR kj -> kk
+NOT ju -> jv
+ek AND em -> en
+kk RSHIFT 5 -> kn
+NOT eh -> ei
+hx OR hy -> hz
+ea OR eb -> ec
+s LSHIFT 15 -> w
+fo RSHIFT 1 -> gh
+kk OR kv -> kw
+bn RSHIFT 5 -> bq
+NOT ed -> ee
+1 AND ht -> hu
+cu AND cw -> cx
+b RSHIFT 5 -> f
+kl AND kr -> kt
+iq OR ip -> ir
+ci RSHIFT 2 -> cj
+cj OR cp -> cq
+o AND q -> r
+dd RSHIFT 5 -> dg
+b RSHIFT 2 -> d
+ks AND ku -> kv
+b RSHIFT 3 -> e
+d OR j -> k
+NOT p -> q
+NOT cr -> cs
+du OR dt -> dv
+kf LSHIFT 15 -> kj
+NOT ac -> ad
+fo RSHIFT 5 -> fr
+hz OR ik -> il
+jx AND jz -> ka
+gh OR gi -> gj
+kk RSHIFT 1 -> ld
+hz RSHIFT 5 -> ic
+as RSHIFT 2 -> at
+NOT jy -> jz
+1 AND am -> an
+ci OR ct -> cu
+hg AND hh -> hj
+jq OR jw -> jx
+v OR w -> x
+la LSHIFT 15 -> le
+dh AND dj -> dk
+dp AND dr -> ds
+jq AND jw -> jy
+au OR av -> aw
+NOT bf -> bg
+z OR aa -> ab
+ga AND gc -> gd
+hz AND ik -> im
+jt AND jv -> jw
+z AND aa -> ac
+jr OR js -> jt
+hb LSHIFT 1 -> hv
+hf OR hl -> hm
+ib OR ic -> id
+fq OR fr -> fs
+cq AND cs -> ct
+ia OR ig -> ih
+dd OR do -> dp
+d AND j -> l
+ib AND ic -> ie
+as RSHIFT 3 -> au
+be AND bg -> bh
+dd AND do -> dq
+NOT l -> m
+1 AND gd -> ge
+y AND ae -> ag
+fo AND fz -> gb
+NOT ie -> if
+e AND f -> h
+x RSHIFT 3 -> z
+y OR ae -> af
+hf AND hl -> hn
+NOT h -> i
+NOT hn -> ho
+he RSHIFT 5 -> hh

From 0a500256dab35ff712f52f132f545fc761c07bb9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:24:30 +0100
Subject: [PATCH 028/100] 2015: d07: ex2: add solution

---
 2015/d07/ex2/ex2.py | 122 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100755 2015/d07/ex2/ex2.py

diff --git a/2015/d07/ex2/ex2.py b/2015/d07/ex2/ex2.py
new file mode 100755
index 0000000..103836f
--- /dev/null
+++ b/2015/d07/ex2/ex2.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+
+import enum
+import operator
+import sys
+from typing import NamedTuple
+
+
+class Op(enum.StrEnum):
+    AND = "AND_"
+    OR = "OR_"
+    LSHIFT = "LSHIFT"
+    RSHIFT = "RSHIFT"
+    NOT = "NOT"
+    IDENTITY = ""  # For the output to `a`, which has no operator
+
+    def apply(self, lhs: int, rhs: int | None) -> int:
+        if self == Op.IDENTITY:
+            assert rhs is None
+            return lhs
+        if self == Op.NOT:
+            assert rhs is None
+            return ~lhs
+        assert rhs is not None
+        return getattr(operator, self.lower())(lhs, rhs)
+
+
+class Instruction(NamedTuple):
+    op: Op
+    lhs: str
+    rhs: str | None = None
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        split_input = input.split()
+        if len(split_input) == 1:
+            op = ""
+            lhs = split_input[0]
+            rest = []
+        elif split_input[0] == "NOT":
+            op, lhs, *rest = split_input
+        else:
+            lhs, op, *rest = split_input
+        # Hacky way to match with the function in the `operator` module...
+        if op in ("AND", "OR"):
+            op = op + "_"
+        return cls(Op(op), lhs, *rest)
+
+
+Circuit = dict[str, Instruction | int]
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, Instruction | int]:
+        raw_instr, wire = input.split(" -> ")
+        if raw_instr.isdigit():
+            return wire, int(raw_instr)
+        return wire, Instruction.from_str(raw_instr)
+
+    def parse(input: str) -> Circuit:
+        return {wire: val for wire, val in map(parse_line, input.splitlines())}
+
+    def dependencies(circuit: Circuit) -> dict[str, set[str]]:
+        res: dict[str, set[str]] = {wire: set() for wire in circuit.keys()}
+        for wire, val in circuit.items():
+            if isinstance(val, int):
+                continue
+            for dep in (val.lhs, val.rhs):
+                if dep is None:
+                    continue
+                if dep.isdigit():
+                    continue
+                res[wire].add(dep)
+        return res
+
+    def topo_sort(dep_graph: dict[str, set[str]]) -> list[str]:
+        res: list[str] = []
+
+        queue = {n for n, deps in dep_graph.items() if not deps}
+        seen: set[str] = set()
+
+        while queue:
+            node = queue.pop()
+
+            res.append(node)
+            seen.add(node)
+            # Iterate over all nodes as we don't have information on children
+            for child, deps in dep_graph.items():
+                if child in seen:
+                    continue
+                if deps - seen:
+                    continue
+                queue.add(child)
+
+        return res
+
+    def run(circuit: Circuit) -> dict[str, int]:
+        res: dict[str, int] = {}
+        for wire in topo_sort(dependencies(circuit)):
+            match circuit[wire]:
+                case int(n):
+                    res[wire] = n
+                case Instruction(op, lhs, rhs):
+                    resolve = lambda v: int(v) if v.isdigit() else res[v]
+                    lhs_n = resolve(lhs)
+                    rhs_n = None if rhs is None else resolve(rhs)
+                    res[wire] = op.apply(lhs_n, rhs_n)
+        return res
+
+    circuit = parse(input)
+    first_run = run(circuit)
+    wires = run(circuit | {"b": first_run["a"]})
+    return wires["a"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 72d37ffa5cfc4be7f165e21ad9be6a5c49c04b13 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:35:28 +0100
Subject: [PATCH 029/100] 2015: d08: ex1: add input

---
 2015/d08/ex1/input | 300 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 300 insertions(+)
 create mode 100644 2015/d08/ex1/input

diff --git a/2015/d08/ex1/input b/2015/d08/ex1/input
new file mode 100644
index 0000000..94538e7
--- /dev/null
+++ b/2015/d08/ex1/input
@@ -0,0 +1,300 @@
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From 0c458813d468dc2cb8dedd87b3e68f03cd104636 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:35:33 +0100
Subject: [PATCH 030/100] 2015: d08: ex1: add solution

---
 2015/d08/ex1/ex1.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 2015/d08/ex1/ex1.py

diff --git a/2015/d08/ex1/ex1.py b/2015/d08/ex1/ex1.py
new file mode 100755
index 0000000..8e14c7f
--- /dev/null
+++ b/2015/d08/ex1/ex1.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+
+import ast
+import sys
+
+
+def solve(input: str) -> int:
+    strings = input.splitlines()
+    # It's too easy to use the built-in parser not to do it...
+    return sum(len(raw) - len(ast.literal_eval(raw)) for raw in strings)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 797b1048505b6eb71adda7857e3354c207be841c Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:35:38 +0100
Subject: [PATCH 031/100] 2015: d08: ex2: add input

---
 2015/d08/ex2/input | 300 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 300 insertions(+)
 create mode 100644 2015/d08/ex2/input

diff --git a/2015/d08/ex2/input b/2015/d08/ex2/input
new file mode 100644
index 0000000..94538e7
--- /dev/null
+++ b/2015/d08/ex2/input
@@ -0,0 +1,300 @@
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From 40f9ff8ae8d3326217a1a823eb6d41c922e934a6 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:35:42 +0100
Subject: [PATCH 032/100] 2015: d08: ex2: add solution

---
 2015/d08/ex2/ex2.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 2015/d08/ex2/ex2.py

diff --git a/2015/d08/ex2/ex2.py b/2015/d08/ex2/ex2.py
new file mode 100755
index 0000000..247844b
--- /dev/null
+++ b/2015/d08/ex2/ex2.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+
+
+def solve(input: str) -> int:
+    def quote_len(raw: str) -> int:
+        characters = collections.Counter(raw)
+        # The `+ 2` is for the surrounding quotes
+        return characters.total() + characters['"'] + characters["\\"] + 2
+
+    strings = input.splitlines()
+    return sum(quote_len(raw) - len(raw) for raw in strings)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 332e7ebcfda54f92637dc172e4a94fdf0e18f36d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:41:40 +0100
Subject: [PATCH 033/100] 2015: d09: ex1: add input

---
 2015/d09/ex1/input | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 2015/d09/ex1/input

diff --git a/2015/d09/ex1/input b/2015/d09/ex1/input
new file mode 100644
index 0000000..9850564
--- /dev/null
+++ b/2015/d09/ex1/input
@@ -0,0 +1,28 @@
+Faerun to Norrath = 129
+Faerun to Tristram = 58
+Faerun to AlphaCentauri = 13
+Faerun to Arbre = 24
+Faerun to Snowdin = 60
+Faerun to Tambi = 71
+Faerun to Straylight = 67
+Norrath to Tristram = 142
+Norrath to AlphaCentauri = 15
+Norrath to Arbre = 135
+Norrath to Snowdin = 75
+Norrath to Tambi = 82
+Norrath to Straylight = 54
+Tristram to AlphaCentauri = 118
+Tristram to Arbre = 122
+Tristram to Snowdin = 103
+Tristram to Tambi = 49
+Tristram to Straylight = 97
+AlphaCentauri to Arbre = 116
+AlphaCentauri to Snowdin = 12
+AlphaCentauri to Tambi = 18
+AlphaCentauri to Straylight = 91
+Arbre to Snowdin = 129
+Arbre to Tambi = 53
+Arbre to Straylight = 40
+Snowdin to Tambi = 15
+Snowdin to Straylight = 99
+Tambi to Straylight = 70

From 53326d7598d523911bcc43dd7ee35011110a3b85 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:41:46 +0100
Subject: [PATCH 034/100] 2015: d09: ex1: add solution

---
 2015/d09/ex1/ex1.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 2015/d09/ex1/ex1.py

diff --git a/2015/d09/ex1/ex1.py b/2015/d09/ex1/ex1.py
new file mode 100755
index 0000000..603897e
--- /dev/null
+++ b/2015/d09/ex1/ex1.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, str, int]:
+        p1, _, p2, _, dist = input.split()
+        return p1, p2, int(dist)
+
+    def parse(input: str) -> dict[str, dict[str, int]]:
+        res: dict[str, dict[str, int]] = collections.defaultdict(dict)
+        for p1, p2, dist in map(parse_line, input.splitlines()):
+            res[p1][p2] = dist
+            res[p2][p1] = dist
+        return res
+
+    # Boring Traveling Salesman solution
+    distances = parse(input)
+    return min(
+        sum(distances[s][e] for s, e in itertools.pairwise(travel_plan))
+        for travel_plan in itertools.permutations(distances.keys())
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From dc7d58b0764d9e5af9c745665905fc3ead2597f3 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:41:50 +0100
Subject: [PATCH 035/100] 2015: d09: ex2: add input

---
 2015/d09/ex2/input | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 2015/d09/ex2/input

diff --git a/2015/d09/ex2/input b/2015/d09/ex2/input
new file mode 100644
index 0000000..9850564
--- /dev/null
+++ b/2015/d09/ex2/input
@@ -0,0 +1,28 @@
+Faerun to Norrath = 129
+Faerun to Tristram = 58
+Faerun to AlphaCentauri = 13
+Faerun to Arbre = 24
+Faerun to Snowdin = 60
+Faerun to Tambi = 71
+Faerun to Straylight = 67
+Norrath to Tristram = 142
+Norrath to AlphaCentauri = 15
+Norrath to Arbre = 135
+Norrath to Snowdin = 75
+Norrath to Tambi = 82
+Norrath to Straylight = 54
+Tristram to AlphaCentauri = 118
+Tristram to Arbre = 122
+Tristram to Snowdin = 103
+Tristram to Tambi = 49
+Tristram to Straylight = 97
+AlphaCentauri to Arbre = 116
+AlphaCentauri to Snowdin = 12
+AlphaCentauri to Tambi = 18
+AlphaCentauri to Straylight = 91
+Arbre to Snowdin = 129
+Arbre to Tambi = 53
+Arbre to Straylight = 40
+Snowdin to Tambi = 15
+Snowdin to Straylight = 99
+Tambi to Straylight = 70

From a3f3f2e5f639dc76db45e6d0143fd2de93f3e5f4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:41:55 +0100
Subject: [PATCH 036/100] 2015: d09: ex2: add solution

---
 2015/d09/ex2/ex2.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 2015/d09/ex2/ex2.py

diff --git a/2015/d09/ex2/ex2.py b/2015/d09/ex2/ex2.py
new file mode 100755
index 0000000..80cfdda
--- /dev/null
+++ b/2015/d09/ex2/ex2.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, str, int]:
+        p1, _, p2, _, dist = input.split()
+        return p1, p2, int(dist)
+
+    def parse(input: str) -> dict[str, dict[str, int]]:
+        res: dict[str, dict[str, int]] = collections.defaultdict(dict)
+        for p1, p2, dist in map(parse_line, input.splitlines()):
+            res[p1][p2] = dist
+            res[p2][p1] = dist
+        return res
+
+    # Boring Traveling Salesman solution
+    distances = parse(input)
+    return max(
+        sum(distances[s][e] for s, e in itertools.pairwise(travel_plan))
+        for travel_plan in itertools.permutations(distances.keys())
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 04dc121ae80637d14289b294f77f33f23a1cb7dc Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:58:15 +0100
Subject: [PATCH 037/100] 2015: d10: ex1: add input

---
 2015/d10/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d10/ex1/input

diff --git a/2015/d10/ex1/input b/2015/d10/ex1/input
new file mode 100644
index 0000000..13dcd63
--- /dev/null
+++ b/2015/d10/ex1/input
@@ -0,0 +1 @@
+3113322113

From e85f35a361a5726dfbb8481a37a08e3cf91cfe88 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:58:26 +0100
Subject: [PATCH 038/100] 2015: d10: ex1: add solution

---
 2015/d10/ex1/ex1.py | 312 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 312 insertions(+)
 create mode 100755 2015/d10/ex1/ex1.py

diff --git a/2015/d10/ex1/ex1.py b/2015/d10/ex1/ex1.py
new file mode 100755
index 0000000..b433abb
--- /dev/null
+++ b/2015/d10/ex1/ex1.py
@@ -0,0 +1,312 @@
+#!/usr/bin/env python
+
+import collections
+import enum
+import sys
+
+
+# https://en.wikipedia.org/wiki/Look-and-say_sequence#Cosmological_decay
+class Atom(enum.StrEnum):
+    H = "22"
+    He = "13112221133211322112211213322112"
+    Li = "312211322212221121123222112"
+    Be = "111312211312113221133211322112211213322112"
+    B = "1321132122211322212221121123222112"
+    C = "3113112211322112211213322112"
+    N = "111312212221121123222112"
+    O = "132112211213322112"
+    F = "31121123222112"
+    Ne = "111213322112"
+    Na = "123222112"
+    Mg = "3113322112"
+    Al = "1113222112"
+    Si = "1322112"
+    P = "311311222112"
+    S = "1113122112"
+    Cl = "132112"
+    Ar = "3112"
+    K = "1112"
+    Ca = "12"
+    Sc = "3113112221133112"
+    Ti = "11131221131112"
+    V = "13211312"
+    Cr = "31132"
+    Mn = "111311222112"
+    Fe = "13122112"
+    Co = "32112"
+    Ni = "11133112"
+    Cu = "131112"
+    Zn = "312"
+    Ga = "13221133122211332"
+    Ge = "31131122211311122113222"
+    As = "11131221131211322113322112"
+    Se = "13211321222113222112"
+    Br = "3113112211322112"
+    Kr = "11131221222112"
+    Rb = "1321122112"
+    Sr = "3112112"
+    Y = "1112133"
+    Zr = "12322211331222113112211"
+    Nb = "1113122113322113111221131221"
+    Mo = "13211322211312113211"
+    Tc = "311322113212221"
+    Ru = "132211331222113112211"
+    Rh = "311311222113111221131221"
+    Pd = "111312211312113211"
+    Ag = "132113212221"
+    Cd = "3113112211"
+    In = "11131221"
+    Sn = "13211"
+    Sb = "3112221"
+    Te = "1322113312211"
+    I = "311311222113111221"
+    Xe = "11131221131211"
+    Cs = "13211321"
+    Ba = "311311"
+    La = "11131"
+    Ce = "1321133112"
+    Pr = "31131112"
+    Nd = "111312"
+    Pm = "132"
+    Sm = "311332"
+    Eu = "1113222"
+    Gd = "13221133112"
+    Tb = "3113112221131112"
+    Dy = "111312211312"
+    Ho = "1321132"
+    Er = "311311222"
+    Tm = "11131221133112"
+    Yb = "1321131112"
+    Lu = "311312"
+    Hf = "11132"
+    Ta = "13112221133211322112211213322113"
+    W = "312211322212221121123222113"
+    Re = "111312211312113221133211322112211213322113"
+    Os = "1321132122211322212221121123222113"
+    Ir = "3113112211322112211213322113"
+    Pt = "111312212221121123222113"
+    Au = "132112211213322113"
+    Hg = "31121123222113"
+    Tl = "111213322113"
+    Pb = "123222113"
+    Bi = "3113322113"
+    Po = "1113222113"
+    At = "1322113"
+    Rn = "311311222113"
+    Fr = "1113122113"
+    Ra = "132113"
+    Ac = "3113"
+    Th = "1113"
+    Pa = "13"
+    U = "3"
+
+    def decay(self) -> list["Atom"]:
+        match self:
+            case Atom.H:
+                return [Atom.H]
+            case Atom.He:
+                return [Atom.Hf, Atom.Pa, Atom.H, Atom.Ca, Atom.Li]
+            case Atom.Li:
+                return [Atom.He]
+            case Atom.Be:
+                return [Atom.Ge, Atom.Ca, Atom.Li]
+            case Atom.B:
+                return [Atom.Be]
+            case Atom.C:
+                return [Atom.B]
+            case Atom.N:
+                return [Atom.C]
+            case Atom.O:
+                return [Atom.N]
+            case Atom.F:
+                return [Atom.O]
+            case Atom.Ne:
+                return [Atom.F]
+            case Atom.Na:
+                return [Atom.Ne]
+            case Atom.Mg:
+                return [Atom.Pm, Atom.Na]
+            case Atom.Al:
+                return [Atom.Mg]
+            case Atom.Si:
+                return [Atom.Al]
+            case Atom.P:
+                return [Atom.Ho, Atom.Si]
+            case Atom.S:
+                return [Atom.P]
+            case Atom.Cl:
+                return [Atom.S]
+            case Atom.Ar:
+                return [Atom.Cl]
+            case Atom.K:
+                return [Atom.Ar]
+            case Atom.Ca:
+                return [Atom.K]
+            case Atom.Sc:
+                return [Atom.Ho, Atom.Pa, Atom.H, Atom.Ca, Atom.Co]
+            case Atom.Ti:
+                return [Atom.Sc]
+            case Atom.V:
+                return [Atom.Ti]
+            case Atom.Cr:
+                return [Atom.V]
+            case Atom.Mn:
+                return [Atom.Cr, Atom.Si]
+            case Atom.Fe:
+                return [Atom.Mn]
+            case Atom.Co:
+                return [Atom.Fe]
+            case Atom.Ni:
+                return [Atom.Zn, Atom.Co]
+            case Atom.Cu:
+                return [Atom.Ni]
+            case Atom.Zn:
+                return [Atom.Cu]
+            case Atom.Ga:
+                return [Atom.Eu, Atom.Ca, Atom.Ac, Atom.H, Atom.Ca, Atom.Zn]
+            case Atom.Ge:
+                return [Atom.Ho, Atom.Ga]
+            case Atom.As:
+                return [Atom.Ge, Atom.Na]
+            case Atom.Se:
+                return [Atom.As]
+            case Atom.Br:
+                return [Atom.Se]
+            case Atom.Kr:
+                return [Atom.Br]
+            case Atom.Rb:
+                return [Atom.Kr]
+            case Atom.Sr:
+                return [Atom.Rb]
+            case Atom.Y:
+                return [Atom.Sr, Atom.U]
+            case Atom.Zr:
+                return [Atom.Y, Atom.H, Atom.Ca, Atom.Tc]
+            case Atom.Nb:
+                return [Atom.Er, Atom.Zr]
+            case Atom.Mo:
+                return [Atom.Nb]
+            case Atom.Tc:
+                return [Atom.Mo]
+            case Atom.Ru:
+                return [Atom.Eu, Atom.Ca, Atom.Tc]
+            case Atom.Rh:
+                return [Atom.Ho, Atom.Ru]
+            case Atom.Pd:
+                return [Atom.Rh]
+            case Atom.Ag:
+                return [Atom.Pd]
+            case Atom.Cd:
+                return [Atom.Ag]
+            case Atom.In:
+                return [Atom.Cd]
+            case Atom.Sn:
+                return [Atom.In]
+            case Atom.Sb:
+                return [Atom.Pm, Atom.Sn]
+            case Atom.Te:
+                return [Atom.Eu, Atom.Ca, Atom.Sb]
+            case Atom.I:
+                return [Atom.Ho, Atom.Te]
+            case Atom.Xe:
+                return [Atom.I]
+            case Atom.Cs:
+                return [Atom.Xe]
+            case Atom.Ba:
+                return [Atom.Cs]
+            case Atom.La:
+                return [Atom.Ba]
+            case Atom.Ce:
+                return [Atom.La, Atom.H, Atom.Ca, Atom.Co]
+            case Atom.Pr:
+                return [Atom.Ce]
+            case Atom.Nd:
+                return [Atom.Pr]
+            case Atom.Pm:
+                return [Atom.Nd]
+            case Atom.Sm:
+                return [Atom.Pm, Atom.Ca, Atom.Zn]
+            case Atom.Eu:
+                return [Atom.Sm]
+            case Atom.Gd:
+                return [Atom.Eu, Atom.Ca, Atom.Co]
+            case Atom.Tb:
+                return [Atom.Ho, Atom.Gd]
+            case Atom.Dy:
+                return [Atom.Tb]
+            case Atom.Ho:
+                return [Atom.Dy]
+            case Atom.Er:
+                return [Atom.Ho, Atom.Pm]
+            case Atom.Tm:
+                return [Atom.Er, Atom.Ca, Atom.Co]
+            case Atom.Yb:
+                return [Atom.Tm]
+            case Atom.Lu:
+                return [Atom.Yb]
+            case Atom.Hf:
+                return [Atom.Lu]
+            case Atom.Ta:
+                return [Atom.Hf, Atom.Pa, Atom.H, Atom.Ca, Atom.W]
+            case Atom.W:
+                return [Atom.Ta]
+            case Atom.Re:
+                return [Atom.Ge, Atom.Ca, Atom.W]
+            case Atom.Os:
+                return [Atom.Re]
+            case Atom.Ir:
+                return [Atom.Os]
+            case Atom.Pt:
+                return [Atom.Ir]
+            case Atom.Au:
+                return [Atom.Pt]
+            case Atom.Hg:
+                return [Atom.Au]
+            case Atom.Tl:
+                return [Atom.Hg]
+            case Atom.Pb:
+                return [Atom.Tl]
+            case Atom.Bi:
+                return [Atom.Pm, Atom.Pb]
+            case Atom.Po:
+                return [Atom.Bi]
+            case Atom.At:
+                return [Atom.Po]
+            case Atom.Rn:
+                return [Atom.Ho, Atom.At]
+            case Atom.Fr:
+                return [Atom.Rn]
+            case Atom.Ra:
+                return [Atom.Fr]
+            case Atom.Ac:
+                return [Atom.Ra]
+            case Atom.Th:
+                return [Atom.Ac]
+            case Atom.Pa:
+                return [Atom.Th]
+            case Atom.U:
+                return [Atom.Pa]
+
+
+def solve(input: str) -> int:
+    def look_and_say(atoms: dict[Atom, int]) -> dict[Atom, int]:
+        res: collections.Counter[Atom] = collections.Counter()
+        for atom, count in atoms.items():
+            for split in atom.decay():
+                res[split] += count
+        return res
+
+    # Happens to work, I assume for all inputs
+    atoms = {Atom(input.strip()): 1}
+    for _ in range(40):
+        atoms = look_and_say(atoms)
+    return sum(len(atom) * count for atom, count in atoms.items())
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From a5539ea9ca6c5f75468d758a3afb9b24c46b5f39 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:58:33 +0100
Subject: [PATCH 039/100] 2015: d10: ex2: add input

---
 2015/d10/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d10/ex2/input

diff --git a/2015/d10/ex2/input b/2015/d10/ex2/input
new file mode 100644
index 0000000..13dcd63
--- /dev/null
+++ b/2015/d10/ex2/input
@@ -0,0 +1 @@
+3113322113

From 2b377c9b9b2f944ededc1a6877662d15ff82d8f8 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 02:58:43 +0100
Subject: [PATCH 040/100] 2015: d10: ex2: add solution

---
 2015/d10/ex2/ex2.py | 312 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 312 insertions(+)
 create mode 100755 2015/d10/ex2/ex2.py

diff --git a/2015/d10/ex2/ex2.py b/2015/d10/ex2/ex2.py
new file mode 100755
index 0000000..1c6f40d
--- /dev/null
+++ b/2015/d10/ex2/ex2.py
@@ -0,0 +1,312 @@
+#!/usr/bin/env python
+
+import collections
+import enum
+import sys
+
+
+# https://en.wikipedia.org/wiki/Look-and-say_sequence#Cosmological_decay
+class Atom(enum.StrEnum):
+    H = "22"
+    He = "13112221133211322112211213322112"
+    Li = "312211322212221121123222112"
+    Be = "111312211312113221133211322112211213322112"
+    B = "1321132122211322212221121123222112"
+    C = "3113112211322112211213322112"
+    N = "111312212221121123222112"
+    O = "132112211213322112"
+    F = "31121123222112"
+    Ne = "111213322112"
+    Na = "123222112"
+    Mg = "3113322112"
+    Al = "1113222112"
+    Si = "1322112"
+    P = "311311222112"
+    S = "1113122112"
+    Cl = "132112"
+    Ar = "3112"
+    K = "1112"
+    Ca = "12"
+    Sc = "3113112221133112"
+    Ti = "11131221131112"
+    V = "13211312"
+    Cr = "31132"
+    Mn = "111311222112"
+    Fe = "13122112"
+    Co = "32112"
+    Ni = "11133112"
+    Cu = "131112"
+    Zn = "312"
+    Ga = "13221133122211332"
+    Ge = "31131122211311122113222"
+    As = "11131221131211322113322112"
+    Se = "13211321222113222112"
+    Br = "3113112211322112"
+    Kr = "11131221222112"
+    Rb = "1321122112"
+    Sr = "3112112"
+    Y = "1112133"
+    Zr = "12322211331222113112211"
+    Nb = "1113122113322113111221131221"
+    Mo = "13211322211312113211"
+    Tc = "311322113212221"
+    Ru = "132211331222113112211"
+    Rh = "311311222113111221131221"
+    Pd = "111312211312113211"
+    Ag = "132113212221"
+    Cd = "3113112211"
+    In = "11131221"
+    Sn = "13211"
+    Sb = "3112221"
+    Te = "1322113312211"
+    I = "311311222113111221"
+    Xe = "11131221131211"
+    Cs = "13211321"
+    Ba = "311311"
+    La = "11131"
+    Ce = "1321133112"
+    Pr = "31131112"
+    Nd = "111312"
+    Pm = "132"
+    Sm = "311332"
+    Eu = "1113222"
+    Gd = "13221133112"
+    Tb = "3113112221131112"
+    Dy = "111312211312"
+    Ho = "1321132"
+    Er = "311311222"
+    Tm = "11131221133112"
+    Yb = "1321131112"
+    Lu = "311312"
+    Hf = "11132"
+    Ta = "13112221133211322112211213322113"
+    W = "312211322212221121123222113"
+    Re = "111312211312113221133211322112211213322113"
+    Os = "1321132122211322212221121123222113"
+    Ir = "3113112211322112211213322113"
+    Pt = "111312212221121123222113"
+    Au = "132112211213322113"
+    Hg = "31121123222113"
+    Tl = "111213322113"
+    Pb = "123222113"
+    Bi = "3113322113"
+    Po = "1113222113"
+    At = "1322113"
+    Rn = "311311222113"
+    Fr = "1113122113"
+    Ra = "132113"
+    Ac = "3113"
+    Th = "1113"
+    Pa = "13"
+    U = "3"
+
+    def decay(self) -> list["Atom"]:
+        match self:
+            case Atom.H:
+                return [Atom.H]
+            case Atom.He:
+                return [Atom.Hf, Atom.Pa, Atom.H, Atom.Ca, Atom.Li]
+            case Atom.Li:
+                return [Atom.He]
+            case Atom.Be:
+                return [Atom.Ge, Atom.Ca, Atom.Li]
+            case Atom.B:
+                return [Atom.Be]
+            case Atom.C:
+                return [Atom.B]
+            case Atom.N:
+                return [Atom.C]
+            case Atom.O:
+                return [Atom.N]
+            case Atom.F:
+                return [Atom.O]
+            case Atom.Ne:
+                return [Atom.F]
+            case Atom.Na:
+                return [Atom.Ne]
+            case Atom.Mg:
+                return [Atom.Pm, Atom.Na]
+            case Atom.Al:
+                return [Atom.Mg]
+            case Atom.Si:
+                return [Atom.Al]
+            case Atom.P:
+                return [Atom.Ho, Atom.Si]
+            case Atom.S:
+                return [Atom.P]
+            case Atom.Cl:
+                return [Atom.S]
+            case Atom.Ar:
+                return [Atom.Cl]
+            case Atom.K:
+                return [Atom.Ar]
+            case Atom.Ca:
+                return [Atom.K]
+            case Atom.Sc:
+                return [Atom.Ho, Atom.Pa, Atom.H, Atom.Ca, Atom.Co]
+            case Atom.Ti:
+                return [Atom.Sc]
+            case Atom.V:
+                return [Atom.Ti]
+            case Atom.Cr:
+                return [Atom.V]
+            case Atom.Mn:
+                return [Atom.Cr, Atom.Si]
+            case Atom.Fe:
+                return [Atom.Mn]
+            case Atom.Co:
+                return [Atom.Fe]
+            case Atom.Ni:
+                return [Atom.Zn, Atom.Co]
+            case Atom.Cu:
+                return [Atom.Ni]
+            case Atom.Zn:
+                return [Atom.Cu]
+            case Atom.Ga:
+                return [Atom.Eu, Atom.Ca, Atom.Ac, Atom.H, Atom.Ca, Atom.Zn]
+            case Atom.Ge:
+                return [Atom.Ho, Atom.Ga]
+            case Atom.As:
+                return [Atom.Ge, Atom.Na]
+            case Atom.Se:
+                return [Atom.As]
+            case Atom.Br:
+                return [Atom.Se]
+            case Atom.Kr:
+                return [Atom.Br]
+            case Atom.Rb:
+                return [Atom.Kr]
+            case Atom.Sr:
+                return [Atom.Rb]
+            case Atom.Y:
+                return [Atom.Sr, Atom.U]
+            case Atom.Zr:
+                return [Atom.Y, Atom.H, Atom.Ca, Atom.Tc]
+            case Atom.Nb:
+                return [Atom.Er, Atom.Zr]
+            case Atom.Mo:
+                return [Atom.Nb]
+            case Atom.Tc:
+                return [Atom.Mo]
+            case Atom.Ru:
+                return [Atom.Eu, Atom.Ca, Atom.Tc]
+            case Atom.Rh:
+                return [Atom.Ho, Atom.Ru]
+            case Atom.Pd:
+                return [Atom.Rh]
+            case Atom.Ag:
+                return [Atom.Pd]
+            case Atom.Cd:
+                return [Atom.Ag]
+            case Atom.In:
+                return [Atom.Cd]
+            case Atom.Sn:
+                return [Atom.In]
+            case Atom.Sb:
+                return [Atom.Pm, Atom.Sn]
+            case Atom.Te:
+                return [Atom.Eu, Atom.Ca, Atom.Sb]
+            case Atom.I:
+                return [Atom.Ho, Atom.Te]
+            case Atom.Xe:
+                return [Atom.I]
+            case Atom.Cs:
+                return [Atom.Xe]
+            case Atom.Ba:
+                return [Atom.Cs]
+            case Atom.La:
+                return [Atom.Ba]
+            case Atom.Ce:
+                return [Atom.La, Atom.H, Atom.Ca, Atom.Co]
+            case Atom.Pr:
+                return [Atom.Ce]
+            case Atom.Nd:
+                return [Atom.Pr]
+            case Atom.Pm:
+                return [Atom.Nd]
+            case Atom.Sm:
+                return [Atom.Pm, Atom.Ca, Atom.Zn]
+            case Atom.Eu:
+                return [Atom.Sm]
+            case Atom.Gd:
+                return [Atom.Eu, Atom.Ca, Atom.Co]
+            case Atom.Tb:
+                return [Atom.Ho, Atom.Gd]
+            case Atom.Dy:
+                return [Atom.Tb]
+            case Atom.Ho:
+                return [Atom.Dy]
+            case Atom.Er:
+                return [Atom.Ho, Atom.Pm]
+            case Atom.Tm:
+                return [Atom.Er, Atom.Ca, Atom.Co]
+            case Atom.Yb:
+                return [Atom.Tm]
+            case Atom.Lu:
+                return [Atom.Yb]
+            case Atom.Hf:
+                return [Atom.Lu]
+            case Atom.Ta:
+                return [Atom.Hf, Atom.Pa, Atom.H, Atom.Ca, Atom.W]
+            case Atom.W:
+                return [Atom.Ta]
+            case Atom.Re:
+                return [Atom.Ge, Atom.Ca, Atom.W]
+            case Atom.Os:
+                return [Atom.Re]
+            case Atom.Ir:
+                return [Atom.Os]
+            case Atom.Pt:
+                return [Atom.Ir]
+            case Atom.Au:
+                return [Atom.Pt]
+            case Atom.Hg:
+                return [Atom.Au]
+            case Atom.Tl:
+                return [Atom.Hg]
+            case Atom.Pb:
+                return [Atom.Tl]
+            case Atom.Bi:
+                return [Atom.Pm, Atom.Pb]
+            case Atom.Po:
+                return [Atom.Bi]
+            case Atom.At:
+                return [Atom.Po]
+            case Atom.Rn:
+                return [Atom.Ho, Atom.At]
+            case Atom.Fr:
+                return [Atom.Rn]
+            case Atom.Ra:
+                return [Atom.Fr]
+            case Atom.Ac:
+                return [Atom.Ra]
+            case Atom.Th:
+                return [Atom.Ac]
+            case Atom.Pa:
+                return [Atom.Th]
+            case Atom.U:
+                return [Atom.Pa]
+
+
+def solve(input: str) -> int:
+    def look_and_say(atoms: dict[Atom, int]) -> dict[Atom, int]:
+        res: collections.Counter[Atom] = collections.Counter()
+        for atom, count in atoms.items():
+            for split in atom.decay():
+                res[split] += count
+        return res
+
+    # Happens to work, I assume for all inputs
+    atoms = {Atom(input.strip()): 1}
+    for _ in range(50):
+        atoms = look_and_say(atoms)
+    return sum(len(atom) * count for atom, count in atoms.items())
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 9a1a48e5f806793a276a523af47e580921fdd072 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:30:57 +0100
Subject: [PATCH 041/100] 2015: d11: ex1: add input

---
 2015/d11/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d11/ex1/input

diff --git a/2015/d11/ex1/input b/2015/d11/ex1/input
new file mode 100644
index 0000000..988745d
--- /dev/null
+++ b/2015/d11/ex1/input
@@ -0,0 +1 @@
+vzbxkghb

From baa134a8b24b40fe5303ff40d6ddcdc925664a55 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:31:03 +0100
Subject: [PATCH 042/100] 2015: d11: ex1: add solution

---
 2015/d11/ex1/ex1.py | 70 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100755 2015/d11/ex1/ex1.py

diff --git a/2015/d11/ex1/ex1.py b/2015/d11/ex1/ex1.py
new file mode 100755
index 0000000..2fa6fe8
--- /dev/null
+++ b/2015/d11/ex1/ex1.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+from collections.abc import Iterable, Iterator
+from typing import TypeVar
+
+T = TypeVar("T")
+
+
+def sliding_window(iterable: Iterable[T], n: int) -> Iterator[tuple[T, ...]]:
+    iterator = iter(iterable)
+    window = collections.deque(itertools.islice(iterator, n - 1), maxlen=n)
+    for x in iterator:
+        window.append(x)
+        yield tuple(window)
+
+
+def solve(input: str) -> str:
+    def parse(input: str) -> int:
+        res = 0
+        for c in input.strip():
+            res = res * 26 + ord(c) - ord("a")
+        return res
+
+    def unparse(n: int) -> str:
+        # Passwords *must* have 8 characters
+        assert 0 <= n < 26**8  # Sanity check
+        return "".join(chr(ord("a") + (n // 26**i) % 26) for i in range(8))[::-1]
+
+    def has_straight(password: str) -> bool:
+        for a, b, c in sliding_window(password, 3):
+            if ord(a) + 1 == ord(b) and ord(b) + 1 == ord(c):
+                return True
+        return False
+
+    def no_iol(password: str) -> bool:
+        return not any(c in password for c in "iol")
+
+    def has_couples(password: str) -> bool:
+        for i, (a, b) in enumerate(itertools.pairwise(password)):
+            if a != b:
+                continue
+            for c, d in itertools.pairwise(password[i + 2 :]):
+                if c == d:
+                    return True
+            return False
+        return False
+
+    n = parse(input)
+    while True:
+        n = (n + 1) % 26**8  # Restrict password to 8 characters
+        password = unparse(n)
+        if not has_straight(password):
+            continue
+        if not no_iol(password):
+            continue
+        if not has_couples(password):
+            continue
+        return password
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e8fc688ac30edcd3c58ae1b1ec9ce08be2c5981d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:31:08 +0100
Subject: [PATCH 043/100] 2015: d11: ex2: add input

---
 2015/d11/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d11/ex2/input

diff --git a/2015/d11/ex2/input b/2015/d11/ex2/input
new file mode 100644
index 0000000..988745d
--- /dev/null
+++ b/2015/d11/ex2/input
@@ -0,0 +1 @@
+vzbxkghb

From ba05a1b3a0588548ab803210d198dc09b5e430fc Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:31:13 +0100
Subject: [PATCH 044/100] 2015: d11: ex2: add solution

---
 2015/d11/ex2/ex2.py | 73 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100755 2015/d11/ex2/ex2.py

diff --git a/2015/d11/ex2/ex2.py b/2015/d11/ex2/ex2.py
new file mode 100755
index 0000000..d69452b
--- /dev/null
+++ b/2015/d11/ex2/ex2.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+from collections.abc import Iterable, Iterator
+from typing import TypeVar
+
+T = TypeVar("T")
+
+
+def sliding_window(iterable: Iterable[T], n: int) -> Iterator[tuple[T, ...]]:
+    iterator = iter(iterable)
+    window = collections.deque(itertools.islice(iterator, n - 1), maxlen=n)
+    for x in iterator:
+        window.append(x)
+        yield tuple(window)
+
+
+def solve(input: str) -> str:
+    def parse(input: str) -> int:
+        res = 0
+        for c in input.strip():
+            res = res * 26 + ord(c) - ord("a")
+        return res
+
+    def unparse(n: int) -> str:
+        # Passwords *must* have 8 characters
+        assert 0 <= n < 26**8  # Sanity check
+        return "".join(chr(ord("a") + (n // 26**i) % 26) for i in range(8))[::-1]
+
+    def has_straight(password: str) -> bool:
+        for a, b, c in sliding_window(password, 3):
+            if ord(a) + 1 == ord(b) and ord(b) + 1 == ord(c):
+                return True
+        return False
+
+    def no_iol(password: str) -> bool:
+        return not any(c in password for c in "iol")
+
+    def has_couples(password: str) -> bool:
+        for i, (a, b) in enumerate(itertools.pairwise(password)):
+            if a != b:
+                continue
+            for c, d in itertools.pairwise(password[i + 2 :]):
+                if c == d:
+                    return True
+            return False
+        return False
+
+    def next_password(password: str) -> str:
+        n = parse(password)
+        while True:
+            n = (n + 1) % 26**8  # Restrict password to 8 characters
+            password = unparse(n)
+            if not has_straight(password):
+                continue
+            if not no_iol(password):
+                continue
+            if not has_couples(password):
+                continue
+            return password
+
+    return next_password(next_password(input))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From b1ae9d9a06f76ce19e7202d6f595f33206431530 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:38:24 +0100
Subject: [PATCH 045/100] 2015: d12: ex1: add input

---
 2015/d12/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d12/ex1/input

diff --git a/2015/d12/ex1/input b/2015/d12/ex1/input
new file mode 100644
index 0000000..87e5309
--- /dev/null
+++ b/2015/d12/ex1/input
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From a0d227c53e3360ec556557a1126478dbce8c861b Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:38:29 +0100
Subject: [PATCH 046/100] 2015: d12: ex1: add solution

---
 2015/d12/ex1/ex1.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 2015/d12/ex1/ex1.py

diff --git a/2015/d12/ex1/ex1.py b/2015/d12/ex1/ex1.py
new file mode 100755
index 0000000..c622db9
--- /dev/null
+++ b/2015/d12/ex1/ex1.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import json
+import sys
+from collections.abc import Iterator
+
+JSONValue = int | str | list["JSONValue"] | dict[str, "JSONValue"]
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> JSONValue:
+        return json.loads(input)
+
+    def all_numbers(doc: JSONValue) -> Iterator[int]:
+        if isinstance(doc, int):
+            yield doc
+        elif isinstance(doc, list):
+            for it in doc:
+                yield from all_numbers(it)
+        elif isinstance(doc, dict):
+            for it in doc.values():
+                yield from all_numbers(it)
+
+    doc = parse(input)
+    return sum(all_numbers(doc))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 8ac7dfe5a7b5a1e3f67b17c9be59cd31535a88a4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:38:33 +0100
Subject: [PATCH 047/100] 2015: d12: ex2: add input

---
 2015/d12/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d12/ex2/input

diff --git a/2015/d12/ex2/input b/2015/d12/ex2/input
new file mode 100644
index 0000000..87e5309
--- /dev/null
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From 3c69c64c18babb232b804a72ad72a3b6c5d6c8ad Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:38:37 +0100
Subject: [PATCH 048/100] 2015: d12: ex2: add solution

---
 2015/d12/ex2/ex2.py | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 2015/d12/ex2/ex2.py

diff --git a/2015/d12/ex2/ex2.py b/2015/d12/ex2/ex2.py
new file mode 100755
index 0000000..5f25859
--- /dev/null
+++ b/2015/d12/ex2/ex2.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+
+import json
+import sys
+from collections.abc import Iterator
+
+JSONValue = int | str | list["JSONValue"] | dict[str, "JSONValue"]
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> JSONValue:
+        return json.loads(input)
+
+    def all_numbers(doc: JSONValue) -> Iterator[int]:
+        if isinstance(doc, int):
+            yield doc
+        elif isinstance(doc, list):
+            for it in doc:
+                yield from all_numbers(it)
+        elif isinstance(doc, dict):
+            if "red" in doc.values():
+                return
+            for it in doc.values():
+                yield from all_numbers(it)
+
+    doc = parse(input)
+    return sum(all_numbers(doc))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From a0ca39ca7209d6d4b844df1c868a1732e16dcc6a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:48:00 +0100
Subject: [PATCH 049/100] 2015: d13: ex1: add input

---
 2015/d13/ex1/input | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 2015/d13/ex1/input

diff --git a/2015/d13/ex1/input b/2015/d13/ex1/input
new file mode 100644
index 0000000..a6f9c66
--- /dev/null
+++ b/2015/d13/ex1/input
@@ -0,0 +1,56 @@
+Alice would gain 2 happiness units by sitting next to Bob.
+Alice would gain 26 happiness units by sitting next to Carol.
+Alice would lose 82 happiness units by sitting next to David.
+Alice would lose 75 happiness units by sitting next to Eric.
+Alice would gain 42 happiness units by sitting next to Frank.
+Alice would gain 38 happiness units by sitting next to George.
+Alice would gain 39 happiness units by sitting next to Mallory.
+Bob would gain 40 happiness units by sitting next to Alice.
+Bob would lose 61 happiness units by sitting next to Carol.
+Bob would lose 15 happiness units by sitting next to David.
+Bob would gain 63 happiness units by sitting next to Eric.
+Bob would gain 41 happiness units by sitting next to Frank.
+Bob would gain 30 happiness units by sitting next to George.
+Bob would gain 87 happiness units by sitting next to Mallory.
+Carol would lose 35 happiness units by sitting next to Alice.
+Carol would lose 99 happiness units by sitting next to Bob.
+Carol would lose 51 happiness units by sitting next to David.
+Carol would gain 95 happiness units by sitting next to Eric.
+Carol would gain 90 happiness units by sitting next to Frank.
+Carol would lose 16 happiness units by sitting next to George.
+Carol would gain 94 happiness units by sitting next to Mallory.
+David would gain 36 happiness units by sitting next to Alice.
+David would lose 18 happiness units by sitting next to Bob.
+David would lose 65 happiness units by sitting next to Carol.
+David would lose 18 happiness units by sitting next to Eric.
+David would lose 22 happiness units by sitting next to Frank.
+David would gain 2 happiness units by sitting next to George.
+David would gain 42 happiness units by sitting next to Mallory.
+Eric would lose 65 happiness units by sitting next to Alice.
+Eric would gain 24 happiness units by sitting next to Bob.
+Eric would gain 100 happiness units by sitting next to Carol.
+Eric would gain 51 happiness units by sitting next to David.
+Eric would gain 21 happiness units by sitting next to Frank.
+Eric would gain 55 happiness units by sitting next to George.
+Eric would lose 44 happiness units by sitting next to Mallory.
+Frank would lose 48 happiness units by sitting next to Alice.
+Frank would gain 91 happiness units by sitting next to Bob.
+Frank would gain 8 happiness units by sitting next to Carol.
+Frank would lose 66 happiness units by sitting next to David.
+Frank would gain 97 happiness units by sitting next to Eric.
+Frank would lose 9 happiness units by sitting next to George.
+Frank would lose 92 happiness units by sitting next to Mallory.
+George would lose 44 happiness units by sitting next to Alice.
+George would lose 25 happiness units by sitting next to Bob.
+George would gain 17 happiness units by sitting next to Carol.
+George would gain 92 happiness units by sitting next to David.
+George would lose 92 happiness units by sitting next to Eric.
+George would gain 18 happiness units by sitting next to Frank.
+George would gain 97 happiness units by sitting next to Mallory.
+Mallory would gain 92 happiness units by sitting next to Alice.
+Mallory would lose 96 happiness units by sitting next to Bob.
+Mallory would lose 51 happiness units by sitting next to Carol.
+Mallory would lose 81 happiness units by sitting next to David.
+Mallory would gain 31 happiness units by sitting next to Eric.
+Mallory would lose 73 happiness units by sitting next to Frank.
+Mallory would lose 89 happiness units by sitting next to George.

From 34aaa729d6d68b222e68dd895f1b2dcbdc6d371a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:48:12 +0100
Subject: [PATCH 050/100] 2015: d13: ex1: add solution

---
 2015/d13/ex1/ex1.py | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 2015/d13/ex1/ex1.py

diff --git a/2015/d13/ex1/ex1.py b/2015/d13/ex1/ex1.py
new file mode 100755
index 0000000..06ac1ad
--- /dev/null
+++ b/2015/d13/ex1/ex1.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, str, int]:
+        split_input = input.removesuffix(".").split()
+        p, other = split_input[0], split_input[-1]
+        delta = int(split_input[3]) * (1 if split_input[2] == "gain" else -1)
+        return p, other, delta
+
+    def parse(input: str) -> dict[str, dict[str, int]]:
+        res: dict[str, dict[str, int]] = collections.defaultdict(dict)
+        for p, neighbour, delta in map(parse_line, input.splitlines()):
+            res[p][neighbour] = delta
+        return res
+
+    def score_seating(deltas: dict[str, dict[str, int]], seating: list[str]) -> int:
+        table = itertools.chain(seating, [seating[0]])
+        return sum(
+            deltas[p1][p2] + deltas[p2][p1] for p1, p2 in itertools.pairwise(table)
+        )
+
+    deltas = parse(input)
+    return max(
+        score_seating(deltas, list(perm))
+        for perm in itertools.permutations(deltas.keys())
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 6e5baf38c29bee426039914170c46ea90123b764 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:48:18 +0100
Subject: [PATCH 051/100] 2015: d13: ex2: add input

---
 2015/d13/ex2/input | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 2015/d13/ex2/input

diff --git a/2015/d13/ex2/input b/2015/d13/ex2/input
new file mode 100644
index 0000000..a6f9c66
--- /dev/null
+++ b/2015/d13/ex2/input
@@ -0,0 +1,56 @@
+Alice would gain 2 happiness units by sitting next to Bob.
+Alice would gain 26 happiness units by sitting next to Carol.
+Alice would lose 82 happiness units by sitting next to David.
+Alice would lose 75 happiness units by sitting next to Eric.
+Alice would gain 42 happiness units by sitting next to Frank.
+Alice would gain 38 happiness units by sitting next to George.
+Alice would gain 39 happiness units by sitting next to Mallory.
+Bob would gain 40 happiness units by sitting next to Alice.
+Bob would lose 61 happiness units by sitting next to Carol.
+Bob would lose 15 happiness units by sitting next to David.
+Bob would gain 63 happiness units by sitting next to Eric.
+Bob would gain 41 happiness units by sitting next to Frank.
+Bob would gain 30 happiness units by sitting next to George.
+Bob would gain 87 happiness units by sitting next to Mallory.
+Carol would lose 35 happiness units by sitting next to Alice.
+Carol would lose 99 happiness units by sitting next to Bob.
+Carol would lose 51 happiness units by sitting next to David.
+Carol would gain 95 happiness units by sitting next to Eric.
+Carol would gain 90 happiness units by sitting next to Frank.
+Carol would lose 16 happiness units by sitting next to George.
+Carol would gain 94 happiness units by sitting next to Mallory.
+David would gain 36 happiness units by sitting next to Alice.
+David would lose 18 happiness units by sitting next to Bob.
+David would lose 65 happiness units by sitting next to Carol.
+David would lose 18 happiness units by sitting next to Eric.
+David would lose 22 happiness units by sitting next to Frank.
+David would gain 2 happiness units by sitting next to George.
+David would gain 42 happiness units by sitting next to Mallory.
+Eric would lose 65 happiness units by sitting next to Alice.
+Eric would gain 24 happiness units by sitting next to Bob.
+Eric would gain 100 happiness units by sitting next to Carol.
+Eric would gain 51 happiness units by sitting next to David.
+Eric would gain 21 happiness units by sitting next to Frank.
+Eric would gain 55 happiness units by sitting next to George.
+Eric would lose 44 happiness units by sitting next to Mallory.
+Frank would lose 48 happiness units by sitting next to Alice.
+Frank would gain 91 happiness units by sitting next to Bob.
+Frank would gain 8 happiness units by sitting next to Carol.
+Frank would lose 66 happiness units by sitting next to David.
+Frank would gain 97 happiness units by sitting next to Eric.
+Frank would lose 9 happiness units by sitting next to George.
+Frank would lose 92 happiness units by sitting next to Mallory.
+George would lose 44 happiness units by sitting next to Alice.
+George would lose 25 happiness units by sitting next to Bob.
+George would gain 17 happiness units by sitting next to Carol.
+George would gain 92 happiness units by sitting next to David.
+George would lose 92 happiness units by sitting next to Eric.
+George would gain 18 happiness units by sitting next to Frank.
+George would gain 97 happiness units by sitting next to Mallory.
+Mallory would gain 92 happiness units by sitting next to Alice.
+Mallory would lose 96 happiness units by sitting next to Bob.
+Mallory would lose 51 happiness units by sitting next to Carol.
+Mallory would lose 81 happiness units by sitting next to David.
+Mallory would gain 31 happiness units by sitting next to Eric.
+Mallory would lose 73 happiness units by sitting next to Frank.
+Mallory would lose 89 happiness units by sitting next to George.

From d19850f8d0b935adc753711f8c8e10e83daea8e0 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 03:48:33 +0100
Subject: [PATCH 052/100] 2015: d13: ex2: add solution

---
 2015/d13/ex2/ex2.py | 47 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100755 2015/d13/ex2/ex2.py

diff --git a/2015/d13/ex2/ex2.py b/2015/d13/ex2/ex2.py
new file mode 100755
index 0000000..a7fad12
--- /dev/null
+++ b/2015/d13/ex2/ex2.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+
+import collections
+import itertools
+import sys
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, str, int]:
+        split_input = input.removesuffix(".").split()
+        p, other = split_input[0], split_input[-1]
+        delta = int(split_input[3]) * (1 if split_input[2] == "gain" else -1)
+        return p, other, delta
+
+    def parse(input: str) -> dict[str, dict[str, int]]:
+        res: dict[str, dict[str, int]] = collections.defaultdict(dict)
+        for p, neighbour, delta in map(parse_line, input.splitlines()):
+            res[p][neighbour] = delta
+        return res
+
+    def score_seating(deltas: dict[str, dict[str, int]], seating: list[str]) -> int:
+        table = itertools.chain(seating, [seating[0]])
+        return sum(
+            deltas[p1][p2] + deltas[p2][p1] for p1, p2 in itertools.pairwise(table)
+        )
+
+    def add_me(deltas: dict[str, dict[str, int]]) -> None:
+        deltas["me"] = {}
+        for other in deltas.keys():
+            deltas["me"][other] = 0
+            deltas[other]["me"] = 0
+
+    deltas = parse(input)
+    add_me(deltas)
+    return max(
+        score_seating(deltas, list(perm))
+        for perm in itertools.permutations(deltas.keys())
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From c0a19164669816b40c1c4a2e06546af2da76faa4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:05:12 +0100
Subject: [PATCH 053/100] 2015: d14: ex1: add input

---
 2015/d14/ex1/input | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 2015/d14/ex1/input

diff --git a/2015/d14/ex1/input b/2015/d14/ex1/input
new file mode 100644
index 0000000..6cf5489
--- /dev/null
+++ b/2015/d14/ex1/input
@@ -0,0 +1,9 @@
+Dancer can fly 27 km/s for 5 seconds, but then must rest for 132 seconds.
+Cupid can fly 22 km/s for 2 seconds, but then must rest for 41 seconds.
+Rudolph can fly 11 km/s for 5 seconds, but then must rest for 48 seconds.
+Donner can fly 28 km/s for 5 seconds, but then must rest for 134 seconds.
+Dasher can fly 4 km/s for 16 seconds, but then must rest for 55 seconds.
+Blitzen can fly 14 km/s for 3 seconds, but then must rest for 38 seconds.
+Prancer can fly 3 km/s for 21 seconds, but then must rest for 40 seconds.
+Comet can fly 18 km/s for 6 seconds, but then must rest for 103 seconds.
+Vixen can fly 18 km/s for 5 seconds, but then must rest for 84 seconds.

From b634beec24cb6e2622308901264d6214fcf34170 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:05:22 +0100
Subject: [PATCH 054/100] 2015: d14: ex1: add solution

---
 2015/d14/ex1/ex1.py | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100755 2015/d14/ex1/ex1.py

diff --git a/2015/d14/ex1/ex1.py b/2015/d14/ex1/ex1.py
new file mode 100755
index 0000000..243daa2
--- /dev/null
+++ b/2015/d14/ex1/ex1.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+import sys
+from typing import NamedTuple
+
+
+class RunPerformance(NamedTuple):
+    speed: int
+    time: int
+    rest: int
+
+    def run(self, t: int) -> int:
+        cycle_length = self.time + self.rest
+        cycles = t // cycle_length
+        left_over = t % cycle_length
+        run_time = cycles * self.time + min(self.time, left_over)
+        return self.speed * run_time
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, RunPerformance]:
+        split_input = input.split()
+        speed, time, rest = map(int, (split_input[3], split_input[6], split_input[-2]))
+        return split_input[0], RunPerformance(speed, time, rest)
+
+    def parse(input: str) -> dict[str, RunPerformance]:
+        return {name: perf for name, perf in map(parse_line, input.splitlines())}
+
+    reindeers = parse(input)
+    return max(perf.run(2503) for perf in reindeers.values())
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 41de5c0abc4a3eab6701ebf9ea39aeb75f24ffa9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:05:36 +0100
Subject: [PATCH 055/100] 2015: d14: ex2: add input

---
 2015/d14/ex2/input | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 2015/d14/ex2/input

diff --git a/2015/d14/ex2/input b/2015/d14/ex2/input
new file mode 100644
index 0000000..6cf5489
--- /dev/null
+++ b/2015/d14/ex2/input
@@ -0,0 +1,9 @@
+Dancer can fly 27 km/s for 5 seconds, but then must rest for 132 seconds.
+Cupid can fly 22 km/s for 2 seconds, but then must rest for 41 seconds.
+Rudolph can fly 11 km/s for 5 seconds, but then must rest for 48 seconds.
+Donner can fly 28 km/s for 5 seconds, but then must rest for 134 seconds.
+Dasher can fly 4 km/s for 16 seconds, but then must rest for 55 seconds.
+Blitzen can fly 14 km/s for 3 seconds, but then must rest for 38 seconds.
+Prancer can fly 3 km/s for 21 seconds, but then must rest for 40 seconds.
+Comet can fly 18 km/s for 6 seconds, but then must rest for 103 seconds.
+Vixen can fly 18 km/s for 5 seconds, but then must rest for 84 seconds.

From ea5b2dfdfc91b518f6073c4f016372267cf5e632 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:05:45 +0100
Subject: [PATCH 056/100] 2015: d14: ex2: add solution

---
 2015/d14/ex2/ex2.py | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100755 2015/d14/ex2/ex2.py

diff --git a/2015/d14/ex2/ex2.py b/2015/d14/ex2/ex2.py
new file mode 100755
index 0000000..dbdd34f
--- /dev/null
+++ b/2015/d14/ex2/ex2.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+import sys
+from typing import NamedTuple
+
+
+class RunPerformance(NamedTuple):
+    speed: int
+    time: int
+    rest: int
+
+    def run(self, t: int) -> int:
+        cycle_length = self.time + self.rest
+        cycles = t // cycle_length
+        left_over = t % cycle_length
+        run_time = cycles * self.time + min(self.time, left_over)
+        return self.speed * run_time
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, RunPerformance]:
+        split_input = input.split()
+        speed, time, rest = map(int, (split_input[3], split_input[6], split_input[-2]))
+        return split_input[0], RunPerformance(speed, time, rest)
+
+    def parse(input: str) -> dict[str, RunPerformance]:
+        return {name: perf for name, perf in map(parse_line, input.splitlines())}
+
+    def race(reindeers: dict[str, RunPerformance], t: int) -> dict[str, int]:
+        points = {name: 0 for name in reindeers.keys()}
+        for i in range(1, t + 1):
+            # Just re-compute the run every time, it's fast enough
+            distances = {name: perf.run(i) for name, perf in reindeers.items()}
+            max_dist = max(distances.values())
+            for name, distance in distances.items():
+                points[name] += distance == max_dist
+        return points
+
+    reindeers = parse(input)
+    scores = race(reindeers, 2503)
+    return max(scores.values())
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 5f561f0208a1be8e592dfbef05a57dc129b328d2 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:36:22 +0100
Subject: [PATCH 057/100] 2015: d15: ex1: add input

---
 2015/d15/ex1/input | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 2015/d15/ex1/input

diff --git a/2015/d15/ex1/input b/2015/d15/ex1/input
new file mode 100644
index 0000000..6281182
--- /dev/null
+++ b/2015/d15/ex1/input
@@ -0,0 +1,4 @@
+Sprinkles: capacity 5, durability -1, flavor 0, texture 0, calories 5
+PeanutButter: capacity -1, durability 3, flavor 0, texture 0, calories 1
+Frosting: capacity 0, durability -1, flavor 4, texture 0, calories 6
+Sugar: capacity -1, durability 0, flavor 0, texture 2, calories 8

From 9caa6f9b98906735681c5a8b3b63f3efa57ce27e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:36:27 +0100
Subject: [PATCH 058/100] 2015: d15: ex1: add solution

---
 2015/d15/ex1/ex1.py | 73 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100755 2015/d15/ex1/ex1.py

diff --git a/2015/d15/ex1/ex1.py b/2015/d15/ex1/ex1.py
new file mode 100755
index 0000000..177d574
--- /dev/null
+++ b/2015/d15/ex1/ex1.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Properties(NamedTuple):
+    capacity: int
+    durability: int
+    flavor: int
+    texture: int
+    calories: int
+
+    @classmethod
+    def from_str(cls, input: str) -> "Properties":
+        properties = map(str.split, input.split(", "))
+        return cls(*(int(prop[-1]) for prop in properties))
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, Properties]:
+        ingredient, properties = input.split(": ")
+        return ingredient, Properties.from_str(properties)
+
+    def parse(input: str) -> dict[str, Properties]:
+        return {name: prop for name, prop in map(parse_line, input.splitlines())}
+
+    def score(ingredients: dict[str, Properties], amounts: dict[str, int]) -> int:
+        assert ingredients.keys() == amounts.keys()  # Sanity check
+        assert sum(amounts.values()) == 100  # Sanity check
+        res = 1
+        for prop in ("capacity", "durability", "flavor", "texture"):
+            res *= max(
+                0,
+                sum(
+                    getattr(ingredients[name], prop) * amounts[name]
+                    for name in ingredients.keys()
+                ),
+            )
+        return res
+
+    def permute_amounts(ingredients: dict[str, Properties]) -> Iterator[dict[str, int]]:
+        def helper(amounts: dict[str, int]) -> Iterator[dict[str, int]]:
+            remaining = 100 - sum(amounts.values())
+            assert remaining >= 0  # Sanity check
+            assert ingredients  # Sanity check
+
+            current = next(iter(n for n in ingredients.keys() if n not in amounts))
+            if (len(amounts) + 1) == len(ingredients):
+                yield amounts | {current: remaining}
+            else:
+                for i in range(remaining):
+                    yield from helper(amounts | {current: i})
+
+        yield from helper({})
+
+    def maximize_score(ingredient: dict[str, Properties]) -> int:
+        return max(
+            score(ingredient, amounts) for amounts in permute_amounts(ingredients)
+        )
+
+    ingredients = parse(input)
+    return maximize_score(ingredients)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e8ef80c528b10923b43c53da0794d1bc761db2f1 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:36:33 +0100
Subject: [PATCH 059/100] 2015: d15: ex2: add input

---
 2015/d15/ex2/input | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 2015/d15/ex2/input

diff --git a/2015/d15/ex2/input b/2015/d15/ex2/input
new file mode 100644
index 0000000..6281182
--- /dev/null
+++ b/2015/d15/ex2/input
@@ -0,0 +1,4 @@
+Sprinkles: capacity 5, durability -1, flavor 0, texture 0, calories 5
+PeanutButter: capacity -1, durability 3, flavor 0, texture 0, calories 1
+Frosting: capacity 0, durability -1, flavor 4, texture 0, calories 6
+Sugar: capacity -1, durability 0, flavor 0, texture 2, calories 8

From 151ab3e24f67a369d7beff29f7fc09b88987910d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 04:37:06 +0100
Subject: [PATCH 060/100] 2015: d15: ex2: add solution

---
 2015/d15/ex2/ex2.py | 85 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100755 2015/d15/ex2/ex2.py

diff --git a/2015/d15/ex2/ex2.py b/2015/d15/ex2/ex2.py
new file mode 100755
index 0000000..1861296
--- /dev/null
+++ b/2015/d15/ex2/ex2.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+
+import sys
+from collections.abc import Iterator
+from typing import Literal, NamedTuple, cast
+
+
+class Properties(NamedTuple):
+    capacity: int
+    durability: int
+    flavor: int
+    texture: int
+    calories: int
+
+    @classmethod
+    def from_str(cls, input: str) -> "Properties":
+        properties = map(str.split, input.split(", "))
+        return cls(*(int(prop[-1]) for prop in properties))
+
+
+PropertyName = Literal["capacity", "durability", "flavor", "texture", "calories"]
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> tuple[str, Properties]:
+        ingredient, properties = input.split(": ")
+        return ingredient, Properties.from_str(properties)
+
+    def parse(input: str) -> dict[str, Properties]:
+        return {name: prop for name, prop in map(parse_line, input.splitlines())}
+
+    def sum_properties(
+        ingredients: dict[str, Properties],
+        amounts: dict[str, int],
+        prop: PropertyName,
+    ) -> int:
+        return sum(
+            getattr(ingredients[name], prop) * amounts[name]
+            for name in ingredients.keys()
+        )
+
+    def score(ingredients: dict[str, Properties], amounts: dict[str, int]) -> int:
+        assert ingredients.keys() == amounts.keys()  # Sanity check
+        assert sum(amounts.values()) == 100  # Sanity check
+        res = 1
+        for prop in ("capacity", "durability", "flavor", "texture"):
+            res *= max(
+                0,
+                sum_properties(ingredients, amounts, cast(PropertyName, prop)),
+            )
+        return res
+
+    def permute_amounts(ingredients: dict[str, Properties]) -> Iterator[dict[str, int]]:
+        def helper(amounts: dict[str, int]) -> Iterator[dict[str, int]]:
+            remaining = 100 - sum(amounts.values())
+            assert remaining >= 0  # Sanity check
+            assert ingredients  # Sanity check
+
+            current = next(iter(n for n in ingredients.keys() if n not in amounts))
+            if (len(amounts) + 1) == len(ingredients):
+                yield amounts | {current: remaining}
+            else:
+                for i in range(remaining):
+                    yield from helper(amounts | {current: i})
+
+        yield from helper({})
+
+    def maximize_score(ingredient: dict[str, Properties]) -> int:
+        return max(
+            score(ingredient, amounts)
+            for amounts in permute_amounts(ingredients)
+            if sum_properties(ingredient, amounts, "calories") == 500
+        )
+
+    ingredients = parse(input)
+    return maximize_score(ingredients)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 74843640bd5e696f6311f94892e9401bc64601e7 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:18:48 +0100
Subject: [PATCH 061/100] 2015: d16: ex1: add input

---
 2015/d16/ex1/input | 500 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 500 insertions(+)
 create mode 100644 2015/d16/ex1/input

diff --git a/2015/d16/ex1/input b/2015/d16/ex1/input
new file mode 100644
index 0000000..92ed31c
--- /dev/null
+++ b/2015/d16/ex1/input
@@ -0,0 +1,500 @@
+Sue 1: goldfish: 6, trees: 9, akitas: 0
+Sue 2: goldfish: 7, trees: 1, akitas: 0
+Sue 3: cars: 10, akitas: 6, perfumes: 7
+Sue 4: perfumes: 2, vizslas: 0, cars: 6
+Sue 5: goldfish: 1, trees: 3, perfumes: 10
+Sue 6: children: 9, vizslas: 7, cars: 9
+Sue 7: cars: 6, vizslas: 5, cats: 3
+Sue 8: akitas: 10, vizslas: 9, children: 3
+Sue 9: vizslas: 8, cats: 2, trees: 1
+Sue 10: perfumes: 10, trees: 6, cars: 4
+Sue 11: cars: 9, children: 1, cats: 1
+Sue 12: pomeranians: 4, akitas: 6, goldfish: 8
+Sue 13: cats: 10, children: 5, trees: 9
+Sue 14: perfumes: 8, vizslas: 3, samoyeds: 1
+Sue 15: vizslas: 2, perfumes: 8, trees: 3
+Sue 16: pomeranians: 10, trees: 9, samoyeds: 4
+Sue 17: akitas: 7, vizslas: 0, goldfish: 6
+Sue 18: trees: 5, vizslas: 9, cars: 0
+Sue 19: akitas: 3, goldfish: 9, trees: 10
+Sue 20: perfumes: 7, samoyeds: 3, vizslas: 10
+Sue 21: perfumes: 7, pomeranians: 10, akitas: 8
+Sue 22: vizslas: 6, trees: 8, akitas: 10
+Sue 23: goldfish: 0, trees: 4, children: 9
+Sue 24: goldfish: 7, pomeranians: 9, akitas: 4
+Sue 25: cars: 7, trees: 4, pomeranians: 4
+Sue 26: trees: 9, akitas: 9, pomeranians: 7
+Sue 27: samoyeds: 0, perfumes: 9, goldfish: 10
+Sue 28: cars: 5, trees: 7, vizslas: 1
+Sue 29: perfumes: 9, trees: 1, children: 6
+Sue 30: goldfish: 10, trees: 0, cars: 4
+Sue 31: akitas: 2, perfumes: 5, goldfish: 5
+Sue 32: goldfish: 0, akitas: 5, trees: 0
+Sue 33: vizslas: 2, akitas: 2, samoyeds: 3
+Sue 34: goldfish: 8, perfumes: 5, cars: 3
+Sue 35: akitas: 1, cats: 4, trees: 9
+Sue 36: cars: 4, vizslas: 4, goldfish: 7
+Sue 37: akitas: 5, perfumes: 7, trees: 3
+Sue 38: goldfish: 10, trees: 2, vizslas: 9
+Sue 39: goldfish: 4, pomeranians: 5, vizslas: 5
+Sue 40: perfumes: 5, samoyeds: 4, akitas: 6
+Sue 41: goldfish: 9, cars: 4, perfumes: 5
+Sue 42: trees: 6, pomeranians: 9, goldfish: 8
+Sue 43: perfumes: 7, pomeranians: 1, akitas: 2
+Sue 44: vizslas: 9, cars: 5, cats: 0
+Sue 45: akitas: 1, goldfish: 6, trees: 0
+Sue 46: akitas: 5, vizslas: 8, trees: 2
+Sue 47: trees: 9, akitas: 2, vizslas: 9
+Sue 48: goldfish: 10, trees: 5, akitas: 2
+Sue 49: cars: 7, vizslas: 2, perfumes: 6
+Sue 50: akitas: 5, goldfish: 6, perfumes: 0
+Sue 51: cars: 9, cats: 7, trees: 5
+Sue 52: akitas: 7, goldfish: 10, cars: 0
+Sue 53: cars: 10, cats: 4, perfumes: 2
+Sue 54: goldfish: 2, pomeranians: 5, perfumes: 10
+Sue 55: vizslas: 5, akitas: 4, cars: 8
+Sue 56: goldfish: 9, vizslas: 4, akitas: 5
+Sue 57: perfumes: 8, samoyeds: 7, cars: 9
+Sue 58: cars: 5, akitas: 7, perfumes: 8
+Sue 59: samoyeds: 8, cars: 10, vizslas: 10
+Sue 60: akitas: 6, samoyeds: 0, goldfish: 3
+Sue 61: trees: 8, pomeranians: 0, akitas: 2
+Sue 62: trees: 1, perfumes: 3, vizslas: 4
+Sue 63: vizslas: 6, samoyeds: 9, goldfish: 8
+Sue 64: goldfish: 7, trees: 6, vizslas: 3
+Sue 65: cars: 1, vizslas: 0, akitas: 6
+Sue 66: cats: 6, pomeranians: 4, cars: 9
+Sue 67: trees: 10, pomeranians: 7, samoyeds: 3
+Sue 68: pomeranians: 5, goldfish: 9, akitas: 1
+Sue 69: akitas: 1, vizslas: 0, trees: 9
+Sue 70: cats: 4, goldfish: 4, vizslas: 10
+Sue 71: vizslas: 7, perfumes: 7, trees: 8
+Sue 72: children: 2, vizslas: 9, cats: 3
+Sue 73: cars: 8, pomeranians: 0, perfumes: 6
+Sue 74: akitas: 1, pomeranians: 8, vizslas: 10
+Sue 75: vizslas: 5, perfumes: 5, cars: 7
+Sue 76: cars: 3, vizslas: 3, goldfish: 0
+Sue 77: akitas: 9, samoyeds: 1, pomeranians: 3
+Sue 78: trees: 0, vizslas: 0, akitas: 6
+Sue 79: pomeranians: 9, cars: 1, perfumes: 0
+Sue 80: perfumes: 10, trees: 1, cats: 0
+Sue 81: goldfish: 5, akitas: 9, trees: 0
+Sue 82: vizslas: 1, akitas: 6, children: 4
+Sue 83: samoyeds: 7, perfumes: 8, pomeranians: 4
+Sue 84: perfumes: 3, children: 3, cats: 7
+Sue 85: goldfish: 9, trees: 3, cars: 9
+Sue 86: cars: 0, perfumes: 9, vizslas: 0
+Sue 87: children: 3, trees: 4, akitas: 3
+Sue 88: trees: 1, samoyeds: 1, goldfish: 0
+Sue 89: akitas: 8, cars: 3, vizslas: 9
+Sue 90: pomeranians: 9, trees: 9, goldfish: 8
+Sue 91: goldfish: 7, trees: 10, children: 0
+Sue 92: cats: 9, cars: 7, perfumes: 7
+Sue 93: vizslas: 2, goldfish: 7, cats: 9
+Sue 94: akitas: 5, cars: 8, vizslas: 4
+Sue 95: goldfish: 7, vizslas: 1, perfumes: 2
+Sue 96: goldfish: 5, trees: 6, perfumes: 10
+Sue 97: trees: 0, perfumes: 7, cars: 0
+Sue 98: cars: 2, perfumes: 6, trees: 8
+Sue 99: trees: 10, children: 7, cats: 9
+Sue 100: samoyeds: 5, goldfish: 6, vizslas: 6
+Sue 101: cars: 10, perfumes: 9, vizslas: 3
+Sue 102: pomeranians: 6, trees: 1, samoyeds: 4
+Sue 103: cars: 2, perfumes: 1, goldfish: 5
+Sue 104: goldfish: 2, cars: 8, pomeranians: 2
+Sue 105: goldfish: 6, vizslas: 0, trees: 10
+Sue 106: trees: 10, akitas: 10, pomeranians: 0
+Sue 107: vizslas: 2, pomeranians: 10, trees: 3
+Sue 108: children: 3, vizslas: 8, akitas: 7
+Sue 109: perfumes: 2, akitas: 2, samoyeds: 3
+Sue 110: goldfish: 7, trees: 1, perfumes: 1
+Sue 111: akitas: 2, cars: 9, perfumes: 2
+Sue 112: children: 10, cars: 0, akitas: 3
+Sue 113: akitas: 9, vizslas: 4, children: 3
+Sue 114: pomeranians: 3, trees: 2, goldfish: 5
+Sue 115: perfumes: 8, cars: 6, trees: 0
+Sue 116: samoyeds: 6, children: 3, pomeranians: 1
+Sue 117: goldfish: 1, trees: 2, akitas: 1
+Sue 118: goldfish: 10, akitas: 10, samoyeds: 0
+Sue 119: vizslas: 10, perfumes: 6, cars: 0
+Sue 120: cars: 2, perfumes: 9, goldfish: 5
+Sue 121: vizslas: 2, trees: 2, cars: 6
+Sue 122: vizslas: 3, trees: 0, akitas: 2
+Sue 123: akitas: 5, samoyeds: 7, goldfish: 1
+Sue 124: goldfish: 8, samoyeds: 7, trees: 8
+Sue 125: trees: 3, goldfish: 8, perfumes: 5
+Sue 126: cats: 3, vizslas: 9, goldfish: 0
+Sue 127: pomeranians: 9, goldfish: 3, perfumes: 6
+Sue 128: vizslas: 4, cars: 8, goldfish: 5
+Sue 129: vizslas: 8, children: 5, perfumes: 8
+Sue 130: cars: 7, children: 7, cats: 3
+Sue 131: perfumes: 1, akitas: 8, vizslas: 9
+Sue 132: perfumes: 7, samoyeds: 10, pomeranians: 6
+Sue 133: cars: 5, perfumes: 3, goldfish: 7
+Sue 134: perfumes: 9, akitas: 2, cats: 3
+Sue 135: perfumes: 1, trees: 9, vizslas: 9
+Sue 136: akitas: 7, cars: 3, perfumes: 7
+Sue 137: vizslas: 9, goldfish: 8, cars: 5
+Sue 138: trees: 0, samoyeds: 1, cars: 3
+Sue 139: cars: 0, perfumes: 6, trees: 0
+Sue 140: pomeranians: 4, cars: 1, perfumes: 7
+Sue 141: vizslas: 10, akitas: 8, cats: 3
+Sue 142: trees: 1, cats: 6, vizslas: 5
+Sue 143: pomeranians: 9, cars: 7, perfumes: 9
+Sue 144: cars: 0, perfumes: 2, pomeranians: 1
+Sue 145: trees: 1, goldfish: 9, perfumes: 8
+Sue 146: cars: 8, children: 5, vizslas: 2
+Sue 147: perfumes: 2, goldfish: 5, cars: 0
+Sue 148: akitas: 2, perfumes: 7, pomeranians: 6
+Sue 149: goldfish: 8, cars: 0, trees: 1
+Sue 150: akitas: 6, perfumes: 5, trees: 0
+Sue 151: vizslas: 6, samoyeds: 8, akitas: 10
+Sue 152: trees: 7, akitas: 7, perfumes: 6
+Sue 153: goldfish: 9, cats: 9, cars: 3
+Sue 154: vizslas: 10, trees: 0, cars: 9
+Sue 155: perfumes: 3, children: 2, goldfish: 1
+Sue 156: goldfish: 7, perfumes: 5, akitas: 6
+Sue 157: cats: 10, trees: 1, goldfish: 0
+Sue 158: cats: 7, children: 7, vizslas: 6
+Sue 159: perfumes: 9, akitas: 0, cars: 0
+Sue 160: akitas: 3, goldfish: 10, pomeranians: 2
+Sue 161: goldfish: 10, cars: 6, perfumes: 3
+Sue 162: trees: 0, cars: 9, goldfish: 1
+Sue 163: cars: 8, perfumes: 9, vizslas: 5
+Sue 164: goldfish: 1, trees: 10, children: 6
+Sue 165: goldfish: 0, vizslas: 6, cars: 0
+Sue 166: akitas: 5, vizslas: 1, cars: 5
+Sue 167: vizslas: 1, samoyeds: 1, children: 4
+Sue 168: samoyeds: 7, vizslas: 7, akitas: 3
+Sue 169: goldfish: 3, cats: 9, trees: 2
+Sue 170: cars: 5, perfumes: 9, vizslas: 5
+Sue 171: goldfish: 7, cars: 6, perfumes: 10
+Sue 172: cats: 6, akitas: 1, children: 6
+Sue 173: cats: 4, goldfish: 1, children: 3
+Sue 174: cars: 2, pomeranians: 2, vizslas: 7
+Sue 175: trees: 0, children: 4, goldfish: 7
+Sue 176: children: 8, cars: 5, cats: 9
+Sue 177: pomeranians: 4, vizslas: 7, trees: 3
+Sue 178: vizslas: 6, perfumes: 10, akitas: 6
+Sue 179: cars: 4, akitas: 4, trees: 4
+Sue 180: akitas: 8, goldfish: 6, trees: 9
+Sue 181: perfumes: 3, vizslas: 10, cars: 3
+Sue 182: vizslas: 3, samoyeds: 3, goldfish: 7
+Sue 183: goldfish: 10, perfumes: 2, cats: 1
+Sue 184: goldfish: 5, trees: 1, perfumes: 1
+Sue 185: vizslas: 10, trees: 9, perfumes: 2
+Sue 186: goldfish: 6, perfumes: 9, trees: 1
+Sue 187: cars: 0, trees: 9, goldfish: 6
+Sue 188: cars: 0, trees: 1, vizslas: 9
+Sue 189: akitas: 7, vizslas: 2, trees: 0
+Sue 190: pomeranians: 5, perfumes: 8, akitas: 10
+Sue 191: vizslas: 5, akitas: 3, cats: 0
+Sue 192: children: 1, trees: 1, cars: 2
+Sue 193: cars: 3, goldfish: 9, trees: 2
+Sue 194: samoyeds: 3, akitas: 4, perfumes: 8
+Sue 195: trees: 1, vizslas: 8, akitas: 10
+Sue 196: akitas: 6, cars: 5, pomeranians: 0
+Sue 197: akitas: 5, vizslas: 5, cats: 1
+Sue 198: trees: 4, cars: 6, goldfish: 6
+Sue 199: cats: 7, cars: 5, goldfish: 6
+Sue 200: vizslas: 4, cats: 0, akitas: 9
+Sue 201: pomeranians: 1, perfumes: 4, children: 2
+Sue 202: cats: 1, perfumes: 4, vizslas: 3
+Sue 203: vizslas: 1, akitas: 9, children: 5
+Sue 204: perfumes: 8, cars: 7, trees: 4
+Sue 205: perfumes: 7, pomeranians: 5, cats: 9
+Sue 206: vizslas: 8, trees: 2, akitas: 2
+Sue 207: akitas: 6, vizslas: 2, perfumes: 10
+Sue 208: vizslas: 1, children: 7, akitas: 4
+Sue 209: perfumes: 4, trees: 2, children: 1
+Sue 210: goldfish: 0, vizslas: 2, samoyeds: 10
+Sue 211: cars: 8, perfumes: 3, trees: 1
+Sue 212: cars: 8, samoyeds: 5, pomeranians: 8
+Sue 213: akitas: 2, goldfish: 8, pomeranians: 2
+Sue 214: akitas: 6, pomeranians: 2, cars: 0
+Sue 215: trees: 10, pomeranians: 4, vizslas: 0
+Sue 216: perfumes: 0, cars: 8, trees: 0
+Sue 217: samoyeds: 8, akitas: 7, children: 10
+Sue 218: perfumes: 1, vizslas: 6, children: 0
+Sue 219: children: 1, goldfish: 4, trees: 1
+Sue 220: akitas: 10, goldfish: 10, trees: 5
+Sue 221: cars: 7, pomeranians: 6, perfumes: 3
+Sue 222: vizslas: 6, children: 0, akitas: 5
+Sue 223: perfumes: 9, cars: 1, trees: 6
+Sue 224: pomeranians: 1, trees: 0, vizslas: 0
+Sue 225: goldfish: 8, akitas: 4, perfumes: 10
+Sue 226: pomeranians: 7, cats: 7, children: 4
+Sue 227: trees: 0, akitas: 2, perfumes: 1
+Sue 228: vizslas: 6, cars: 10, perfumes: 9
+Sue 229: cars: 0, perfumes: 6, trees: 4
+Sue 230: pomeranians: 7, perfumes: 5, trees: 2
+Sue 231: goldfish: 9, cars: 6, trees: 7
+Sue 232: akitas: 1, vizslas: 5, cars: 3
+Sue 233: akitas: 7, samoyeds: 2, vizslas: 5
+Sue 234: akitas: 6, cats: 8, pomeranians: 0
+Sue 235: pomeranians: 5, akitas: 5, vizslas: 3
+Sue 236: goldfish: 5, trees: 6, akitas: 5
+Sue 237: goldfish: 9, perfumes: 5, cats: 5
+Sue 238: cats: 8, goldfish: 4, perfumes: 0
+Sue 239: samoyeds: 8, children: 6, pomeranians: 6
+Sue 240: akitas: 4, samoyeds: 10, trees: 8
+Sue 241: trees: 2, goldfish: 8, cars: 1
+Sue 242: perfumes: 2, cars: 0, akitas: 10
+Sue 243: pomeranians: 1, cars: 7, trees: 2
+Sue 244: trees: 9, vizslas: 2, akitas: 10
+Sue 245: cars: 9, pomeranians: 4, trees: 0
+Sue 246: cars: 9, pomeranians: 7, perfumes: 1
+Sue 247: trees: 0, goldfish: 1, akitas: 8
+Sue 248: vizslas: 1, cats: 4, akitas: 4
+Sue 249: cats: 6, children: 4, goldfish: 9
+Sue 250: vizslas: 1, cars: 10, samoyeds: 5
+Sue 251: cars: 0, goldfish: 1, vizslas: 7
+Sue 252: cars: 7, akitas: 9, vizslas: 10
+Sue 253: akitas: 7, vizslas: 2, perfumes: 5
+Sue 254: vizslas: 10, akitas: 5, samoyeds: 0
+Sue 255: pomeranians: 8, goldfish: 0, cats: 6
+Sue 256: cars: 10, goldfish: 8, vizslas: 9
+Sue 257: goldfish: 3, perfumes: 9, cats: 3
+Sue 258: trees: 6, goldfish: 6, cars: 6
+Sue 259: trees: 0, goldfish: 2, perfumes: 8
+Sue 260: trees: 5, akitas: 0, cars: 0
+Sue 261: pomeranians: 9, goldfish: 7, perfumes: 8
+Sue 262: perfumes: 8, vizslas: 6, goldfish: 2
+Sue 263: vizslas: 6, trees: 5, goldfish: 9
+Sue 264: vizslas: 4, perfumes: 7, cars: 9
+Sue 265: goldfish: 10, trees: 3, perfumes: 1
+Sue 266: trees: 10, akitas: 8, goldfish: 8
+Sue 267: goldfish: 4, trees: 0, samoyeds: 9
+Sue 268: vizslas: 1, trees: 0, goldfish: 8
+Sue 269: cars: 2, perfumes: 10, goldfish: 5
+Sue 270: perfumes: 7, cars: 2, vizslas: 1
+Sue 271: cars: 6, perfumes: 10, goldfish: 6
+Sue 272: samoyeds: 4, goldfish: 2, vizslas: 9
+Sue 273: perfumes: 4, goldfish: 4, vizslas: 1
+Sue 274: children: 4, cars: 4, perfumes: 3
+Sue 275: children: 8, vizslas: 3, trees: 2
+Sue 276: vizslas: 5, children: 7, perfumes: 3
+Sue 277: perfumes: 3, cats: 4, vizslas: 5
+Sue 278: cars: 1, samoyeds: 10, akitas: 2
+Sue 279: trees: 9, perfumes: 9, cars: 10
+Sue 280: vizslas: 5, trees: 0, perfumes: 6
+Sue 281: vizslas: 3, akitas: 10, pomeranians: 7
+Sue 282: trees: 1, children: 2, akitas: 8
+Sue 283: akitas: 9, goldfish: 6, cats: 5
+Sue 284: cars: 9, children: 10, pomeranians: 2
+Sue 285: pomeranians: 0, perfumes: 4, cars: 7
+Sue 286: perfumes: 0, vizslas: 10, akitas: 10
+Sue 287: cats: 2, perfumes: 3, trees: 5
+Sue 288: akitas: 9, vizslas: 8, samoyeds: 9
+Sue 289: perfumes: 6, children: 2, cars: 7
+Sue 290: akitas: 0, children: 5, cars: 5
+Sue 291: cars: 4, perfumes: 0, trees: 1
+Sue 292: cats: 0, cars: 8, perfumes: 6
+Sue 293: akitas: 9, cats: 5, children: 5
+Sue 294: akitas: 4, cars: 9, goldfish: 3
+Sue 295: cars: 2, akitas: 3, perfumes: 7
+Sue 296: perfumes: 4, cars: 7, goldfish: 10
+Sue 297: trees: 5, akitas: 8, vizslas: 1
+Sue 298: perfumes: 0, goldfish: 6, trees: 9
+Sue 299: perfumes: 6, samoyeds: 8, cars: 1
+Sue 300: goldfish: 10, perfumes: 4, akitas: 2
+Sue 301: cars: 3, trees: 0, goldfish: 8
+Sue 302: perfumes: 7, samoyeds: 2, vizslas: 7
+Sue 303: children: 10, goldfish: 7, perfumes: 2
+Sue 304: samoyeds: 8, vizslas: 2, cars: 1
+Sue 305: trees: 1, cats: 0, goldfish: 10
+Sue 306: trees: 4, perfumes: 2, cars: 7
+Sue 307: cars: 6, vizslas: 2, children: 6
+Sue 308: vizslas: 2, cars: 0, akitas: 7
+Sue 309: cars: 3, vizslas: 8, perfumes: 6
+Sue 310: goldfish: 7, perfumes: 7, vizslas: 3
+Sue 311: pomeranians: 10, trees: 2, cars: 0
+Sue 312: samoyeds: 2, vizslas: 9, akitas: 1
+Sue 313: cars: 4, pomeranians: 7, goldfish: 7
+Sue 314: akitas: 2, pomeranians: 9, samoyeds: 10
+Sue 315: akitas: 3, vizslas: 2, trees: 0
+Sue 316: cars: 0, perfumes: 4, pomeranians: 6
+Sue 317: akitas: 10, goldfish: 3, pomeranians: 7
+Sue 318: cars: 9, trees: 0, pomeranians: 9
+Sue 319: akitas: 3, vizslas: 7, children: 10
+Sue 320: vizslas: 0, akitas: 8, pomeranians: 4
+Sue 321: cars: 10, akitas: 9, vizslas: 3
+Sue 322: perfumes: 0, akitas: 8, vizslas: 6
+Sue 323: vizslas: 10, perfumes: 5, cars: 3
+Sue 324: akitas: 0, goldfish: 6, vizslas: 7
+Sue 325: perfumes: 9, vizslas: 5, pomeranians: 2
+Sue 326: vizslas: 6, goldfish: 10, pomeranians: 8
+Sue 327: vizslas: 10, cars: 1, akitas: 7
+Sue 328: trees: 1, perfumes: 10, cars: 10
+Sue 329: pomeranians: 5, samoyeds: 3, cars: 10
+Sue 330: akitas: 6, cars: 1, pomeranians: 4
+Sue 331: cars: 5, children: 2, trees: 0
+Sue 332: vizslas: 6, pomeranians: 1, perfumes: 0
+Sue 333: akitas: 7, trees: 1, cats: 9
+Sue 334: vizslas: 6, goldfish: 9, akitas: 7
+Sue 335: akitas: 3, samoyeds: 3, cars: 3
+Sue 336: samoyeds: 10, perfumes: 9, trees: 6
+Sue 337: vizslas: 2, cars: 9, akitas: 0
+Sue 338: akitas: 6, perfumes: 9, vizslas: 3
+Sue 339: cars: 3, samoyeds: 8, trees: 2
+Sue 340: cats: 7, perfumes: 8, cars: 9
+Sue 341: goldfish: 9, perfumes: 5, cars: 10
+Sue 342: trees: 0, akitas: 3, perfumes: 5
+Sue 343: perfumes: 2, children: 0, cars: 6
+Sue 344: goldfish: 8, trees: 8, perfumes: 0
+Sue 345: perfumes: 6, cars: 6, goldfish: 5
+Sue 346: vizslas: 8, trees: 1, cars: 6
+Sue 347: cars: 0, cats: 3, perfumes: 7
+Sue 348: children: 7, perfumes: 10, cars: 7
+Sue 349: pomeranians: 8, akitas: 5, children: 2
+Sue 350: perfumes: 9, pomeranians: 4, goldfish: 3
+Sue 351: perfumes: 8, pomeranians: 7, trees: 4
+Sue 352: samoyeds: 1, goldfish: 9, akitas: 8
+Sue 353: akitas: 6, goldfish: 10, vizslas: 8
+Sue 354: akitas: 7, cars: 2, goldfish: 6
+Sue 355: cars: 3, goldfish: 6, akitas: 5
+Sue 356: akitas: 2, goldfish: 9, pomeranians: 1
+Sue 357: goldfish: 10, cars: 6, pomeranians: 9
+Sue 358: trees: 0, children: 2, goldfish: 6
+Sue 359: samoyeds: 3, cars: 2, akitas: 4
+Sue 360: trees: 1, goldfish: 8, cars: 5
+Sue 361: akitas: 5, vizslas: 7, perfumes: 1
+Sue 362: cats: 5, vizslas: 9, children: 4
+Sue 363: goldfish: 9, perfumes: 3, vizslas: 9
+Sue 364: children: 7, samoyeds: 2, pomeranians: 10
+Sue 365: perfumes: 9, akitas: 10, pomeranians: 4
+Sue 366: cars: 10, trees: 3, cats: 4
+Sue 367: vizslas: 6, akitas: 10, perfumes: 5
+Sue 368: akitas: 9, vizslas: 9, children: 4
+Sue 369: goldfish: 8, trees: 2, perfumes: 5
+Sue 370: trees: 0, children: 4, cars: 8
+Sue 371: cats: 6, perfumes: 0, vizslas: 2
+Sue 372: akitas: 7, cars: 5, perfumes: 3
+Sue 373: cars: 0, perfumes: 4, pomeranians: 10
+Sue 374: akitas: 5, perfumes: 5, vizslas: 2
+Sue 375: goldfish: 7, trees: 10, pomeranians: 7
+Sue 376: cars: 8, trees: 1, pomeranians: 8
+Sue 377: cars: 0, akitas: 9, vizslas: 1
+Sue 378: akitas: 5, perfumes: 3, vizslas: 7
+Sue 379: trees: 2, goldfish: 8, pomeranians: 8
+Sue 380: akitas: 5, cars: 9, perfumes: 9
+Sue 381: cars: 2, perfumes: 6, trees: 3
+Sue 382: perfumes: 6, vizslas: 2, goldfish: 9
+Sue 383: akitas: 8, vizslas: 7, cats: 1
+Sue 384: akitas: 9, trees: 10, vizslas: 7
+Sue 385: cars: 0, perfumes: 7, vizslas: 2
+Sue 386: vizslas: 10, akitas: 4, perfumes: 9
+Sue 387: perfumes: 6, pomeranians: 5, samoyeds: 8
+Sue 388: vizslas: 10, trees: 9, goldfish: 9
+Sue 389: goldfish: 8, akitas: 4, perfumes: 10
+Sue 390: goldfish: 6, trees: 8, akitas: 1
+Sue 391: vizslas: 4, akitas: 10, goldfish: 7
+Sue 392: akitas: 1, vizslas: 6, samoyeds: 5
+Sue 393: trees: 6, cars: 3, akitas: 5
+Sue 394: goldfish: 9, trees: 3, cars: 5
+Sue 395: akitas: 6, samoyeds: 4, goldfish: 4
+Sue 396: akitas: 2, trees: 1, cats: 5
+Sue 397: cars: 0, children: 9, trees: 10
+Sue 398: pomeranians: 3, samoyeds: 9, goldfish: 10
+Sue 399: cars: 7, akitas: 4, goldfish: 8
+Sue 400: cars: 4, akitas: 5, vizslas: 4
+Sue 401: pomeranians: 5, akitas: 8, vizslas: 5
+Sue 402: cats: 7, cars: 6, goldfish: 6
+Sue 403: samoyeds: 8, perfumes: 4, cars: 5
+Sue 404: akitas: 10, goldfish: 4, trees: 2
+Sue 405: trees: 8, perfumes: 1, cars: 2
+Sue 406: trees: 0, perfumes: 9, pomeranians: 10
+Sue 407: perfumes: 4, trees: 7, goldfish: 3
+Sue 408: akitas: 1, perfumes: 3, cars: 5
+Sue 409: trees: 6, samoyeds: 3, cars: 9
+Sue 410: vizslas: 3, goldfish: 5, akitas: 7
+Sue 411: goldfish: 10, trees: 1, vizslas: 9
+Sue 412: cars: 0, akitas: 6, trees: 6
+Sue 413: goldfish: 7, trees: 0, cars: 3
+Sue 414: pomeranians: 10, samoyeds: 3, cars: 10
+Sue 415: perfumes: 6, trees: 9, cars: 4
+Sue 416: trees: 2, cars: 4, goldfish: 8
+Sue 417: goldfish: 2, cars: 9, cats: 5
+Sue 418: vizslas: 1, cars: 9, akitas: 0
+Sue 419: perfumes: 6, cats: 3, children: 9
+Sue 420: cats: 5, goldfish: 7, akitas: 9
+Sue 421: trees: 1, samoyeds: 6, pomeranians: 1
+Sue 422: trees: 10, goldfish: 6, children: 7
+Sue 423: cars: 8, goldfish: 7, vizslas: 3
+Sue 424: samoyeds: 9, akitas: 7, trees: 5
+Sue 425: akitas: 5, children: 4, perfumes: 9
+Sue 426: goldfish: 1, children: 9, cats: 2
+Sue 427: vizslas: 9, akitas: 7, goldfish: 9
+Sue 428: pomeranians: 7, akitas: 5, vizslas: 1
+Sue 429: vizslas: 7, goldfish: 7, cars: 9
+Sue 430: trees: 7, perfumes: 0, pomeranians: 5
+Sue 431: children: 9, perfumes: 5, vizslas: 7
+Sue 432: trees: 6, samoyeds: 7, cats: 1
+Sue 433: goldfish: 5, trees: 5, children: 6
+Sue 434: goldfish: 9, akitas: 7, cars: 3
+Sue 435: samoyeds: 10, perfumes: 2, cars: 0
+Sue 436: akitas: 5, pomeranians: 4, perfumes: 7
+Sue 437: vizslas: 5, cats: 6, perfumes: 5
+Sue 438: trees: 2, goldfish: 6, vizslas: 7
+Sue 439: samoyeds: 8, pomeranians: 10, goldfish: 1
+Sue 440: akitas: 6, children: 9, perfumes: 4
+Sue 441: cars: 2, goldfish: 9, children: 0
+Sue 442: goldfish: 7, cars: 2, vizslas: 8
+Sue 443: goldfish: 6, samoyeds: 3, perfumes: 2
+Sue 444: trees: 2, goldfish: 7, cars: 8
+Sue 445: trees: 2, pomeranians: 0, children: 0
+Sue 446: perfumes: 4, akitas: 4, goldfish: 6
+Sue 447: vizslas: 7, akitas: 9, cars: 3
+Sue 448: goldfish: 6, trees: 9, cars: 0
+Sue 449: samoyeds: 7, perfumes: 4, vizslas: 10
+Sue 450: akitas: 7, cars: 10, goldfish: 7
+Sue 451: goldfish: 4, children: 7, pomeranians: 4
+Sue 452: cats: 4, vizslas: 6, trees: 7
+Sue 453: cars: 1, trees: 10, goldfish: 9
+Sue 454: trees: 2, goldfish: 3, vizslas: 10
+Sue 455: pomeranians: 9, vizslas: 3, akitas: 2
+Sue 456: vizslas: 10, akitas: 2, goldfish: 1
+Sue 457: trees: 5, cats: 5, children: 8
+Sue 458: cars: 6, goldfish: 3, akitas: 9
+Sue 459: goldfish: 7, akitas: 2, cats: 7
+Sue 460: akitas: 1, cars: 5, children: 8
+Sue 461: cars: 8, perfumes: 0, goldfish: 6
+Sue 462: pomeranians: 6, cats: 2, perfumes: 6
+Sue 463: vizslas: 7, perfumes: 3, goldfish: 3
+Sue 464: akitas: 10, goldfish: 10, trees: 1
+Sue 465: vizslas: 0, akitas: 2, trees: 2
+Sue 466: perfumes: 6, akitas: 8, cars: 2
+Sue 467: goldfish: 1, cars: 10, perfumes: 3
+Sue 468: goldfish: 4, trees: 2, cars: 9
+Sue 469: perfumes: 6, pomeranians: 0, vizslas: 10
+Sue 470: samoyeds: 8, children: 0, akitas: 7
+Sue 471: children: 3, goldfish: 9, cats: 9
+Sue 472: samoyeds: 0, goldfish: 0, trees: 0
+Sue 473: trees: 3, goldfish: 4, vizslas: 1
+Sue 474: perfumes: 10, cars: 3, trees: 7
+Sue 475: akitas: 5, vizslas: 4, goldfish: 5
+Sue 476: children: 2, akitas: 7, vizslas: 3
+Sue 477: vizslas: 6, pomeranians: 9, trees: 6
+Sue 478: vizslas: 7, pomeranians: 6, akitas: 7
+Sue 479: trees: 2, perfumes: 2, children: 2
+Sue 480: cars: 8, cats: 5, vizslas: 0
+Sue 481: trees: 5, goldfish: 0, akitas: 3
+Sue 482: cars: 8, perfumes: 6, goldfish: 10
+Sue 483: goldfish: 0, cars: 3, perfumes: 10
+Sue 484: pomeranians: 1, samoyeds: 1, perfumes: 3
+Sue 485: trees: 0, akitas: 2, vizslas: 4
+Sue 486: cars: 3, vizslas: 8, goldfish: 1
+Sue 487: pomeranians: 9, vizslas: 2, children: 10
+Sue 488: akitas: 6, vizslas: 10, perfumes: 9
+Sue 489: goldfish: 6, vizslas: 4, cars: 2
+Sue 490: vizslas: 10, cats: 8, samoyeds: 1
+Sue 491: cats: 9, cars: 1, perfumes: 10
+Sue 492: goldfish: 6, cars: 9, pomeranians: 9
+Sue 493: children: 10, goldfish: 10, vizslas: 0
+Sue 494: pomeranians: 5, cars: 0, vizslas: 0
+Sue 495: vizslas: 7, perfumes: 6, samoyeds: 3
+Sue 496: trees: 1, cats: 4, cars: 10
+Sue 497: cats: 1, perfumes: 0, cars: 7
+Sue 498: perfumes: 7, vizslas: 6, cats: 9
+Sue 499: vizslas: 8, perfumes: 1, akitas: 3
+Sue 500: perfumes: 4, cars: 9, trees: 4

From 5cce56ced2c79531f5121fd928948c0448a920e9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:18:54 +0100
Subject: [PATCH 062/100] 2015: d16: ex1: add solution

---
 2015/d16/ex1/ex1.py | 62 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 2015/d16/ex1/ex1.py

diff --git a/2015/d16/ex1/ex1.py b/2015/d16/ex1/ex1.py
new file mode 100755
index 0000000..a7ca6c2
--- /dev/null
+++ b/2015/d16/ex1/ex1.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+import sys
+from typing import NamedTuple
+
+
+class Sue(NamedTuple):
+    children: int | None = None
+    cats: int | None = None
+    samoyeds: int | None = None
+    pomeranians: int | None = None
+    akitas: int | None = None
+    vizslas: int | None = None
+    goldfish: int | None = None
+    trees: int | None = None
+    cars: int | None = None
+    perfumes: int | None = None
+
+    def matches(self, reading: "Sue") -> bool:
+        for it, reading_it in zip(self, reading):
+            if it is None or reading_it is None:
+                continue
+            if it != reading_it:
+                return False
+        return True
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> Sue:
+        _, other = input.split(": ", 1)
+        raw_items = other.split(", ")
+        items = {
+            name: int(val) for name, val in (item.split(": ") for item in raw_items)
+        }
+        return Sue(**items)
+
+    def parse(input: str) -> list[Sue]:
+        return [parse_line(line) for line in input.splitlines()]
+
+    aunts = parse(input)
+    reading = Sue(
+        children=3,
+        cats=7,
+        samoyeds=2,
+        pomeranians=3,
+        akitas=0,
+        vizslas=0,
+        goldfish=5,
+        trees=3,
+        cars=2,
+        perfumes=1,
+    )
+    return next(i for i, sue in enumerate(aunts, 1) if sue.matches(reading))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 0aefdfa45706e3837f0fd9aa827788a2750b34ec Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:18:59 +0100
Subject: [PATCH 063/100] 2015: d16: ex2: add input

---
 2015/d16/ex2/input | 500 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 500 insertions(+)
 create mode 100644 2015/d16/ex2/input

diff --git a/2015/d16/ex2/input b/2015/d16/ex2/input
new file mode 100644
index 0000000..92ed31c
--- /dev/null
+++ b/2015/d16/ex2/input
@@ -0,0 +1,500 @@
+Sue 1: goldfish: 6, trees: 9, akitas: 0
+Sue 2: goldfish: 7, trees: 1, akitas: 0
+Sue 3: cars: 10, akitas: 6, perfumes: 7
+Sue 4: perfumes: 2, vizslas: 0, cars: 6
+Sue 5: goldfish: 1, trees: 3, perfumes: 10
+Sue 6: children: 9, vizslas: 7, cars: 9
+Sue 7: cars: 6, vizslas: 5, cats: 3
+Sue 8: akitas: 10, vizslas: 9, children: 3
+Sue 9: vizslas: 8, cats: 2, trees: 1
+Sue 10: perfumes: 10, trees: 6, cars: 4
+Sue 11: cars: 9, children: 1, cats: 1
+Sue 12: pomeranians: 4, akitas: 6, goldfish: 8
+Sue 13: cats: 10, children: 5, trees: 9
+Sue 14: perfumes: 8, vizslas: 3, samoyeds: 1
+Sue 15: vizslas: 2, perfumes: 8, trees: 3
+Sue 16: pomeranians: 10, trees: 9, samoyeds: 4
+Sue 17: akitas: 7, vizslas: 0, goldfish: 6
+Sue 18: trees: 5, vizslas: 9, cars: 0
+Sue 19: akitas: 3, goldfish: 9, trees: 10
+Sue 20: perfumes: 7, samoyeds: 3, vizslas: 10
+Sue 21: perfumes: 7, pomeranians: 10, akitas: 8
+Sue 22: vizslas: 6, trees: 8, akitas: 10
+Sue 23: goldfish: 0, trees: 4, children: 9
+Sue 24: goldfish: 7, pomeranians: 9, akitas: 4
+Sue 25: cars: 7, trees: 4, pomeranians: 4
+Sue 26: trees: 9, akitas: 9, pomeranians: 7
+Sue 27: samoyeds: 0, perfumes: 9, goldfish: 10
+Sue 28: cars: 5, trees: 7, vizslas: 1
+Sue 29: perfumes: 9, trees: 1, children: 6
+Sue 30: goldfish: 10, trees: 0, cars: 4
+Sue 31: akitas: 2, perfumes: 5, goldfish: 5
+Sue 32: goldfish: 0, akitas: 5, trees: 0
+Sue 33: vizslas: 2, akitas: 2, samoyeds: 3
+Sue 34: goldfish: 8, perfumes: 5, cars: 3
+Sue 35: akitas: 1, cats: 4, trees: 9
+Sue 36: cars: 4, vizslas: 4, goldfish: 7
+Sue 37: akitas: 5, perfumes: 7, trees: 3
+Sue 38: goldfish: 10, trees: 2, vizslas: 9
+Sue 39: goldfish: 4, pomeranians: 5, vizslas: 5
+Sue 40: perfumes: 5, samoyeds: 4, akitas: 6
+Sue 41: goldfish: 9, cars: 4, perfumes: 5
+Sue 42: trees: 6, pomeranians: 9, goldfish: 8
+Sue 43: perfumes: 7, pomeranians: 1, akitas: 2
+Sue 44: vizslas: 9, cars: 5, cats: 0
+Sue 45: akitas: 1, goldfish: 6, trees: 0
+Sue 46: akitas: 5, vizslas: 8, trees: 2
+Sue 47: trees: 9, akitas: 2, vizslas: 9
+Sue 48: goldfish: 10, trees: 5, akitas: 2
+Sue 49: cars: 7, vizslas: 2, perfumes: 6
+Sue 50: akitas: 5, goldfish: 6, perfumes: 0
+Sue 51: cars: 9, cats: 7, trees: 5
+Sue 52: akitas: 7, goldfish: 10, cars: 0
+Sue 53: cars: 10, cats: 4, perfumes: 2
+Sue 54: goldfish: 2, pomeranians: 5, perfumes: 10
+Sue 55: vizslas: 5, akitas: 4, cars: 8
+Sue 56: goldfish: 9, vizslas: 4, akitas: 5
+Sue 57: perfumes: 8, samoyeds: 7, cars: 9
+Sue 58: cars: 5, akitas: 7, perfumes: 8
+Sue 59: samoyeds: 8, cars: 10, vizslas: 10
+Sue 60: akitas: 6, samoyeds: 0, goldfish: 3
+Sue 61: trees: 8, pomeranians: 0, akitas: 2
+Sue 62: trees: 1, perfumes: 3, vizslas: 4
+Sue 63: vizslas: 6, samoyeds: 9, goldfish: 8
+Sue 64: goldfish: 7, trees: 6, vizslas: 3
+Sue 65: cars: 1, vizslas: 0, akitas: 6
+Sue 66: cats: 6, pomeranians: 4, cars: 9
+Sue 67: trees: 10, pomeranians: 7, samoyeds: 3
+Sue 68: pomeranians: 5, goldfish: 9, akitas: 1
+Sue 69: akitas: 1, vizslas: 0, trees: 9
+Sue 70: cats: 4, goldfish: 4, vizslas: 10
+Sue 71: vizslas: 7, perfumes: 7, trees: 8
+Sue 72: children: 2, vizslas: 9, cats: 3
+Sue 73: cars: 8, pomeranians: 0, perfumes: 6
+Sue 74: akitas: 1, pomeranians: 8, vizslas: 10
+Sue 75: vizslas: 5, perfumes: 5, cars: 7
+Sue 76: cars: 3, vizslas: 3, goldfish: 0
+Sue 77: akitas: 9, samoyeds: 1, pomeranians: 3
+Sue 78: trees: 0, vizslas: 0, akitas: 6
+Sue 79: pomeranians: 9, cars: 1, perfumes: 0
+Sue 80: perfumes: 10, trees: 1, cats: 0
+Sue 81: goldfish: 5, akitas: 9, trees: 0
+Sue 82: vizslas: 1, akitas: 6, children: 4
+Sue 83: samoyeds: 7, perfumes: 8, pomeranians: 4
+Sue 84: perfumes: 3, children: 3, cats: 7
+Sue 85: goldfish: 9, trees: 3, cars: 9
+Sue 86: cars: 0, perfumes: 9, vizslas: 0
+Sue 87: children: 3, trees: 4, akitas: 3
+Sue 88: trees: 1, samoyeds: 1, goldfish: 0
+Sue 89: akitas: 8, cars: 3, vizslas: 9
+Sue 90: pomeranians: 9, trees: 9, goldfish: 8
+Sue 91: goldfish: 7, trees: 10, children: 0
+Sue 92: cats: 9, cars: 7, perfumes: 7
+Sue 93: vizslas: 2, goldfish: 7, cats: 9
+Sue 94: akitas: 5, cars: 8, vizslas: 4
+Sue 95: goldfish: 7, vizslas: 1, perfumes: 2
+Sue 96: goldfish: 5, trees: 6, perfumes: 10
+Sue 97: trees: 0, perfumes: 7, cars: 0
+Sue 98: cars: 2, perfumes: 6, trees: 8
+Sue 99: trees: 10, children: 7, cats: 9
+Sue 100: samoyeds: 5, goldfish: 6, vizslas: 6
+Sue 101: cars: 10, perfumes: 9, vizslas: 3
+Sue 102: pomeranians: 6, trees: 1, samoyeds: 4
+Sue 103: cars: 2, perfumes: 1, goldfish: 5
+Sue 104: goldfish: 2, cars: 8, pomeranians: 2
+Sue 105: goldfish: 6, vizslas: 0, trees: 10
+Sue 106: trees: 10, akitas: 10, pomeranians: 0
+Sue 107: vizslas: 2, pomeranians: 10, trees: 3
+Sue 108: children: 3, vizslas: 8, akitas: 7
+Sue 109: perfumes: 2, akitas: 2, samoyeds: 3
+Sue 110: goldfish: 7, trees: 1, perfumes: 1
+Sue 111: akitas: 2, cars: 9, perfumes: 2
+Sue 112: children: 10, cars: 0, akitas: 3
+Sue 113: akitas: 9, vizslas: 4, children: 3
+Sue 114: pomeranians: 3, trees: 2, goldfish: 5
+Sue 115: perfumes: 8, cars: 6, trees: 0
+Sue 116: samoyeds: 6, children: 3, pomeranians: 1
+Sue 117: goldfish: 1, trees: 2, akitas: 1
+Sue 118: goldfish: 10, akitas: 10, samoyeds: 0
+Sue 119: vizslas: 10, perfumes: 6, cars: 0
+Sue 120: cars: 2, perfumes: 9, goldfish: 5
+Sue 121: vizslas: 2, trees: 2, cars: 6
+Sue 122: vizslas: 3, trees: 0, akitas: 2
+Sue 123: akitas: 5, samoyeds: 7, goldfish: 1
+Sue 124: goldfish: 8, samoyeds: 7, trees: 8
+Sue 125: trees: 3, goldfish: 8, perfumes: 5
+Sue 126: cats: 3, vizslas: 9, goldfish: 0
+Sue 127: pomeranians: 9, goldfish: 3, perfumes: 6
+Sue 128: vizslas: 4, cars: 8, goldfish: 5
+Sue 129: vizslas: 8, children: 5, perfumes: 8
+Sue 130: cars: 7, children: 7, cats: 3
+Sue 131: perfumes: 1, akitas: 8, vizslas: 9
+Sue 132: perfumes: 7, samoyeds: 10, pomeranians: 6
+Sue 133: cars: 5, perfumes: 3, goldfish: 7
+Sue 134: perfumes: 9, akitas: 2, cats: 3
+Sue 135: perfumes: 1, trees: 9, vizslas: 9
+Sue 136: akitas: 7, cars: 3, perfumes: 7
+Sue 137: vizslas: 9, goldfish: 8, cars: 5
+Sue 138: trees: 0, samoyeds: 1, cars: 3
+Sue 139: cars: 0, perfumes: 6, trees: 0
+Sue 140: pomeranians: 4, cars: 1, perfumes: 7
+Sue 141: vizslas: 10, akitas: 8, cats: 3
+Sue 142: trees: 1, cats: 6, vizslas: 5
+Sue 143: pomeranians: 9, cars: 7, perfumes: 9
+Sue 144: cars: 0, perfumes: 2, pomeranians: 1
+Sue 145: trees: 1, goldfish: 9, perfumes: 8
+Sue 146: cars: 8, children: 5, vizslas: 2
+Sue 147: perfumes: 2, goldfish: 5, cars: 0
+Sue 148: akitas: 2, perfumes: 7, pomeranians: 6
+Sue 149: goldfish: 8, cars: 0, trees: 1
+Sue 150: akitas: 6, perfumes: 5, trees: 0
+Sue 151: vizslas: 6, samoyeds: 8, akitas: 10
+Sue 152: trees: 7, akitas: 7, perfumes: 6
+Sue 153: goldfish: 9, cats: 9, cars: 3
+Sue 154: vizslas: 10, trees: 0, cars: 9
+Sue 155: perfumes: 3, children: 2, goldfish: 1
+Sue 156: goldfish: 7, perfumes: 5, akitas: 6
+Sue 157: cats: 10, trees: 1, goldfish: 0
+Sue 158: cats: 7, children: 7, vizslas: 6
+Sue 159: perfumes: 9, akitas: 0, cars: 0
+Sue 160: akitas: 3, goldfish: 10, pomeranians: 2
+Sue 161: goldfish: 10, cars: 6, perfumes: 3
+Sue 162: trees: 0, cars: 9, goldfish: 1
+Sue 163: cars: 8, perfumes: 9, vizslas: 5
+Sue 164: goldfish: 1, trees: 10, children: 6
+Sue 165: goldfish: 0, vizslas: 6, cars: 0
+Sue 166: akitas: 5, vizslas: 1, cars: 5
+Sue 167: vizslas: 1, samoyeds: 1, children: 4
+Sue 168: samoyeds: 7, vizslas: 7, akitas: 3
+Sue 169: goldfish: 3, cats: 9, trees: 2
+Sue 170: cars: 5, perfumes: 9, vizslas: 5
+Sue 171: goldfish: 7, cars: 6, perfumes: 10
+Sue 172: cats: 6, akitas: 1, children: 6
+Sue 173: cats: 4, goldfish: 1, children: 3
+Sue 174: cars: 2, pomeranians: 2, vizslas: 7
+Sue 175: trees: 0, children: 4, goldfish: 7
+Sue 176: children: 8, cars: 5, cats: 9
+Sue 177: pomeranians: 4, vizslas: 7, trees: 3
+Sue 178: vizslas: 6, perfumes: 10, akitas: 6
+Sue 179: cars: 4, akitas: 4, trees: 4
+Sue 180: akitas: 8, goldfish: 6, trees: 9
+Sue 181: perfumes: 3, vizslas: 10, cars: 3
+Sue 182: vizslas: 3, samoyeds: 3, goldfish: 7
+Sue 183: goldfish: 10, perfumes: 2, cats: 1
+Sue 184: goldfish: 5, trees: 1, perfumes: 1
+Sue 185: vizslas: 10, trees: 9, perfumes: 2
+Sue 186: goldfish: 6, perfumes: 9, trees: 1
+Sue 187: cars: 0, trees: 9, goldfish: 6
+Sue 188: cars: 0, trees: 1, vizslas: 9
+Sue 189: akitas: 7, vizslas: 2, trees: 0
+Sue 190: pomeranians: 5, perfumes: 8, akitas: 10
+Sue 191: vizslas: 5, akitas: 3, cats: 0
+Sue 192: children: 1, trees: 1, cars: 2
+Sue 193: cars: 3, goldfish: 9, trees: 2
+Sue 194: samoyeds: 3, akitas: 4, perfumes: 8
+Sue 195: trees: 1, vizslas: 8, akitas: 10
+Sue 196: akitas: 6, cars: 5, pomeranians: 0
+Sue 197: akitas: 5, vizslas: 5, cats: 1
+Sue 198: trees: 4, cars: 6, goldfish: 6
+Sue 199: cats: 7, cars: 5, goldfish: 6
+Sue 200: vizslas: 4, cats: 0, akitas: 9
+Sue 201: pomeranians: 1, perfumes: 4, children: 2
+Sue 202: cats: 1, perfumes: 4, vizslas: 3
+Sue 203: vizslas: 1, akitas: 9, children: 5
+Sue 204: perfumes: 8, cars: 7, trees: 4
+Sue 205: perfumes: 7, pomeranians: 5, cats: 9
+Sue 206: vizslas: 8, trees: 2, akitas: 2
+Sue 207: akitas: 6, vizslas: 2, perfumes: 10
+Sue 208: vizslas: 1, children: 7, akitas: 4
+Sue 209: perfumes: 4, trees: 2, children: 1
+Sue 210: goldfish: 0, vizslas: 2, samoyeds: 10
+Sue 211: cars: 8, perfumes: 3, trees: 1
+Sue 212: cars: 8, samoyeds: 5, pomeranians: 8
+Sue 213: akitas: 2, goldfish: 8, pomeranians: 2
+Sue 214: akitas: 6, pomeranians: 2, cars: 0
+Sue 215: trees: 10, pomeranians: 4, vizslas: 0
+Sue 216: perfumes: 0, cars: 8, trees: 0
+Sue 217: samoyeds: 8, akitas: 7, children: 10
+Sue 218: perfumes: 1, vizslas: 6, children: 0
+Sue 219: children: 1, goldfish: 4, trees: 1
+Sue 220: akitas: 10, goldfish: 10, trees: 5
+Sue 221: cars: 7, pomeranians: 6, perfumes: 3
+Sue 222: vizslas: 6, children: 0, akitas: 5
+Sue 223: perfumes: 9, cars: 1, trees: 6
+Sue 224: pomeranians: 1, trees: 0, vizslas: 0
+Sue 225: goldfish: 8, akitas: 4, perfumes: 10
+Sue 226: pomeranians: 7, cats: 7, children: 4
+Sue 227: trees: 0, akitas: 2, perfumes: 1
+Sue 228: vizslas: 6, cars: 10, perfumes: 9
+Sue 229: cars: 0, perfumes: 6, trees: 4
+Sue 230: pomeranians: 7, perfumes: 5, trees: 2
+Sue 231: goldfish: 9, cars: 6, trees: 7
+Sue 232: akitas: 1, vizslas: 5, cars: 3
+Sue 233: akitas: 7, samoyeds: 2, vizslas: 5
+Sue 234: akitas: 6, cats: 8, pomeranians: 0
+Sue 235: pomeranians: 5, akitas: 5, vizslas: 3
+Sue 236: goldfish: 5, trees: 6, akitas: 5
+Sue 237: goldfish: 9, perfumes: 5, cats: 5
+Sue 238: cats: 8, goldfish: 4, perfumes: 0
+Sue 239: samoyeds: 8, children: 6, pomeranians: 6
+Sue 240: akitas: 4, samoyeds: 10, trees: 8
+Sue 241: trees: 2, goldfish: 8, cars: 1
+Sue 242: perfumes: 2, cars: 0, akitas: 10
+Sue 243: pomeranians: 1, cars: 7, trees: 2
+Sue 244: trees: 9, vizslas: 2, akitas: 10
+Sue 245: cars: 9, pomeranians: 4, trees: 0
+Sue 246: cars: 9, pomeranians: 7, perfumes: 1
+Sue 247: trees: 0, goldfish: 1, akitas: 8
+Sue 248: vizslas: 1, cats: 4, akitas: 4
+Sue 249: cats: 6, children: 4, goldfish: 9
+Sue 250: vizslas: 1, cars: 10, samoyeds: 5
+Sue 251: cars: 0, goldfish: 1, vizslas: 7
+Sue 252: cars: 7, akitas: 9, vizslas: 10
+Sue 253: akitas: 7, vizslas: 2, perfumes: 5
+Sue 254: vizslas: 10, akitas: 5, samoyeds: 0
+Sue 255: pomeranians: 8, goldfish: 0, cats: 6
+Sue 256: cars: 10, goldfish: 8, vizslas: 9
+Sue 257: goldfish: 3, perfumes: 9, cats: 3
+Sue 258: trees: 6, goldfish: 6, cars: 6
+Sue 259: trees: 0, goldfish: 2, perfumes: 8
+Sue 260: trees: 5, akitas: 0, cars: 0
+Sue 261: pomeranians: 9, goldfish: 7, perfumes: 8
+Sue 262: perfumes: 8, vizslas: 6, goldfish: 2
+Sue 263: vizslas: 6, trees: 5, goldfish: 9
+Sue 264: vizslas: 4, perfumes: 7, cars: 9
+Sue 265: goldfish: 10, trees: 3, perfumes: 1
+Sue 266: trees: 10, akitas: 8, goldfish: 8
+Sue 267: goldfish: 4, trees: 0, samoyeds: 9
+Sue 268: vizslas: 1, trees: 0, goldfish: 8
+Sue 269: cars: 2, perfumes: 10, goldfish: 5
+Sue 270: perfumes: 7, cars: 2, vizslas: 1
+Sue 271: cars: 6, perfumes: 10, goldfish: 6
+Sue 272: samoyeds: 4, goldfish: 2, vizslas: 9
+Sue 273: perfumes: 4, goldfish: 4, vizslas: 1
+Sue 274: children: 4, cars: 4, perfumes: 3
+Sue 275: children: 8, vizslas: 3, trees: 2
+Sue 276: vizslas: 5, children: 7, perfumes: 3
+Sue 277: perfumes: 3, cats: 4, vizslas: 5
+Sue 278: cars: 1, samoyeds: 10, akitas: 2
+Sue 279: trees: 9, perfumes: 9, cars: 10
+Sue 280: vizslas: 5, trees: 0, perfumes: 6
+Sue 281: vizslas: 3, akitas: 10, pomeranians: 7
+Sue 282: trees: 1, children: 2, akitas: 8
+Sue 283: akitas: 9, goldfish: 6, cats: 5
+Sue 284: cars: 9, children: 10, pomeranians: 2
+Sue 285: pomeranians: 0, perfumes: 4, cars: 7
+Sue 286: perfumes: 0, vizslas: 10, akitas: 10
+Sue 287: cats: 2, perfumes: 3, trees: 5
+Sue 288: akitas: 9, vizslas: 8, samoyeds: 9
+Sue 289: perfumes: 6, children: 2, cars: 7
+Sue 290: akitas: 0, children: 5, cars: 5
+Sue 291: cars: 4, perfumes: 0, trees: 1
+Sue 292: cats: 0, cars: 8, perfumes: 6
+Sue 293: akitas: 9, cats: 5, children: 5
+Sue 294: akitas: 4, cars: 9, goldfish: 3
+Sue 295: cars: 2, akitas: 3, perfumes: 7
+Sue 296: perfumes: 4, cars: 7, goldfish: 10
+Sue 297: trees: 5, akitas: 8, vizslas: 1
+Sue 298: perfumes: 0, goldfish: 6, trees: 9
+Sue 299: perfumes: 6, samoyeds: 8, cars: 1
+Sue 300: goldfish: 10, perfumes: 4, akitas: 2
+Sue 301: cars: 3, trees: 0, goldfish: 8
+Sue 302: perfumes: 7, samoyeds: 2, vizslas: 7
+Sue 303: children: 10, goldfish: 7, perfumes: 2
+Sue 304: samoyeds: 8, vizslas: 2, cars: 1
+Sue 305: trees: 1, cats: 0, goldfish: 10
+Sue 306: trees: 4, perfumes: 2, cars: 7
+Sue 307: cars: 6, vizslas: 2, children: 6
+Sue 308: vizslas: 2, cars: 0, akitas: 7
+Sue 309: cars: 3, vizslas: 8, perfumes: 6
+Sue 310: goldfish: 7, perfumes: 7, vizslas: 3
+Sue 311: pomeranians: 10, trees: 2, cars: 0
+Sue 312: samoyeds: 2, vizslas: 9, akitas: 1
+Sue 313: cars: 4, pomeranians: 7, goldfish: 7
+Sue 314: akitas: 2, pomeranians: 9, samoyeds: 10
+Sue 315: akitas: 3, vizslas: 2, trees: 0
+Sue 316: cars: 0, perfumes: 4, pomeranians: 6
+Sue 317: akitas: 10, goldfish: 3, pomeranians: 7
+Sue 318: cars: 9, trees: 0, pomeranians: 9
+Sue 319: akitas: 3, vizslas: 7, children: 10
+Sue 320: vizslas: 0, akitas: 8, pomeranians: 4
+Sue 321: cars: 10, akitas: 9, vizslas: 3
+Sue 322: perfumes: 0, akitas: 8, vizslas: 6
+Sue 323: vizslas: 10, perfumes: 5, cars: 3
+Sue 324: akitas: 0, goldfish: 6, vizslas: 7
+Sue 325: perfumes: 9, vizslas: 5, pomeranians: 2
+Sue 326: vizslas: 6, goldfish: 10, pomeranians: 8
+Sue 327: vizslas: 10, cars: 1, akitas: 7
+Sue 328: trees: 1, perfumes: 10, cars: 10
+Sue 329: pomeranians: 5, samoyeds: 3, cars: 10
+Sue 330: akitas: 6, cars: 1, pomeranians: 4
+Sue 331: cars: 5, children: 2, trees: 0
+Sue 332: vizslas: 6, pomeranians: 1, perfumes: 0
+Sue 333: akitas: 7, trees: 1, cats: 9
+Sue 334: vizslas: 6, goldfish: 9, akitas: 7
+Sue 335: akitas: 3, samoyeds: 3, cars: 3
+Sue 336: samoyeds: 10, perfumes: 9, trees: 6
+Sue 337: vizslas: 2, cars: 9, akitas: 0
+Sue 338: akitas: 6, perfumes: 9, vizslas: 3
+Sue 339: cars: 3, samoyeds: 8, trees: 2
+Sue 340: cats: 7, perfumes: 8, cars: 9
+Sue 341: goldfish: 9, perfumes: 5, cars: 10
+Sue 342: trees: 0, akitas: 3, perfumes: 5
+Sue 343: perfumes: 2, children: 0, cars: 6
+Sue 344: goldfish: 8, trees: 8, perfumes: 0
+Sue 345: perfumes: 6, cars: 6, goldfish: 5
+Sue 346: vizslas: 8, trees: 1, cars: 6
+Sue 347: cars: 0, cats: 3, perfumes: 7
+Sue 348: children: 7, perfumes: 10, cars: 7
+Sue 349: pomeranians: 8, akitas: 5, children: 2
+Sue 350: perfumes: 9, pomeranians: 4, goldfish: 3
+Sue 351: perfumes: 8, pomeranians: 7, trees: 4
+Sue 352: samoyeds: 1, goldfish: 9, akitas: 8
+Sue 353: akitas: 6, goldfish: 10, vizslas: 8
+Sue 354: akitas: 7, cars: 2, goldfish: 6
+Sue 355: cars: 3, goldfish: 6, akitas: 5
+Sue 356: akitas: 2, goldfish: 9, pomeranians: 1
+Sue 357: goldfish: 10, cars: 6, pomeranians: 9
+Sue 358: trees: 0, children: 2, goldfish: 6
+Sue 359: samoyeds: 3, cars: 2, akitas: 4
+Sue 360: trees: 1, goldfish: 8, cars: 5
+Sue 361: akitas: 5, vizslas: 7, perfumes: 1
+Sue 362: cats: 5, vizslas: 9, children: 4
+Sue 363: goldfish: 9, perfumes: 3, vizslas: 9
+Sue 364: children: 7, samoyeds: 2, pomeranians: 10
+Sue 365: perfumes: 9, akitas: 10, pomeranians: 4
+Sue 366: cars: 10, trees: 3, cats: 4
+Sue 367: vizslas: 6, akitas: 10, perfumes: 5
+Sue 368: akitas: 9, vizslas: 9, children: 4
+Sue 369: goldfish: 8, trees: 2, perfumes: 5
+Sue 370: trees: 0, children: 4, cars: 8
+Sue 371: cats: 6, perfumes: 0, vizslas: 2
+Sue 372: akitas: 7, cars: 5, perfumes: 3
+Sue 373: cars: 0, perfumes: 4, pomeranians: 10
+Sue 374: akitas: 5, perfumes: 5, vizslas: 2
+Sue 375: goldfish: 7, trees: 10, pomeranians: 7
+Sue 376: cars: 8, trees: 1, pomeranians: 8
+Sue 377: cars: 0, akitas: 9, vizslas: 1
+Sue 378: akitas: 5, perfumes: 3, vizslas: 7
+Sue 379: trees: 2, goldfish: 8, pomeranians: 8
+Sue 380: akitas: 5, cars: 9, perfumes: 9
+Sue 381: cars: 2, perfumes: 6, trees: 3
+Sue 382: perfumes: 6, vizslas: 2, goldfish: 9
+Sue 383: akitas: 8, vizslas: 7, cats: 1
+Sue 384: akitas: 9, trees: 10, vizslas: 7
+Sue 385: cars: 0, perfumes: 7, vizslas: 2
+Sue 386: vizslas: 10, akitas: 4, perfumes: 9
+Sue 387: perfumes: 6, pomeranians: 5, samoyeds: 8
+Sue 388: vizslas: 10, trees: 9, goldfish: 9
+Sue 389: goldfish: 8, akitas: 4, perfumes: 10
+Sue 390: goldfish: 6, trees: 8, akitas: 1
+Sue 391: vizslas: 4, akitas: 10, goldfish: 7
+Sue 392: akitas: 1, vizslas: 6, samoyeds: 5
+Sue 393: trees: 6, cars: 3, akitas: 5
+Sue 394: goldfish: 9, trees: 3, cars: 5
+Sue 395: akitas: 6, samoyeds: 4, goldfish: 4
+Sue 396: akitas: 2, trees: 1, cats: 5
+Sue 397: cars: 0, children: 9, trees: 10
+Sue 398: pomeranians: 3, samoyeds: 9, goldfish: 10
+Sue 399: cars: 7, akitas: 4, goldfish: 8
+Sue 400: cars: 4, akitas: 5, vizslas: 4
+Sue 401: pomeranians: 5, akitas: 8, vizslas: 5
+Sue 402: cats: 7, cars: 6, goldfish: 6
+Sue 403: samoyeds: 8, perfumes: 4, cars: 5
+Sue 404: akitas: 10, goldfish: 4, trees: 2
+Sue 405: trees: 8, perfumes: 1, cars: 2
+Sue 406: trees: 0, perfumes: 9, pomeranians: 10
+Sue 407: perfumes: 4, trees: 7, goldfish: 3
+Sue 408: akitas: 1, perfumes: 3, cars: 5
+Sue 409: trees: 6, samoyeds: 3, cars: 9
+Sue 410: vizslas: 3, goldfish: 5, akitas: 7
+Sue 411: goldfish: 10, trees: 1, vizslas: 9
+Sue 412: cars: 0, akitas: 6, trees: 6
+Sue 413: goldfish: 7, trees: 0, cars: 3
+Sue 414: pomeranians: 10, samoyeds: 3, cars: 10
+Sue 415: perfumes: 6, trees: 9, cars: 4
+Sue 416: trees: 2, cars: 4, goldfish: 8
+Sue 417: goldfish: 2, cars: 9, cats: 5
+Sue 418: vizslas: 1, cars: 9, akitas: 0
+Sue 419: perfumes: 6, cats: 3, children: 9
+Sue 420: cats: 5, goldfish: 7, akitas: 9
+Sue 421: trees: 1, samoyeds: 6, pomeranians: 1
+Sue 422: trees: 10, goldfish: 6, children: 7
+Sue 423: cars: 8, goldfish: 7, vizslas: 3
+Sue 424: samoyeds: 9, akitas: 7, trees: 5
+Sue 425: akitas: 5, children: 4, perfumes: 9
+Sue 426: goldfish: 1, children: 9, cats: 2
+Sue 427: vizslas: 9, akitas: 7, goldfish: 9
+Sue 428: pomeranians: 7, akitas: 5, vizslas: 1
+Sue 429: vizslas: 7, goldfish: 7, cars: 9
+Sue 430: trees: 7, perfumes: 0, pomeranians: 5
+Sue 431: children: 9, perfumes: 5, vizslas: 7
+Sue 432: trees: 6, samoyeds: 7, cats: 1
+Sue 433: goldfish: 5, trees: 5, children: 6
+Sue 434: goldfish: 9, akitas: 7, cars: 3
+Sue 435: samoyeds: 10, perfumes: 2, cars: 0
+Sue 436: akitas: 5, pomeranians: 4, perfumes: 7
+Sue 437: vizslas: 5, cats: 6, perfumes: 5
+Sue 438: trees: 2, goldfish: 6, vizslas: 7
+Sue 439: samoyeds: 8, pomeranians: 10, goldfish: 1
+Sue 440: akitas: 6, children: 9, perfumes: 4
+Sue 441: cars: 2, goldfish: 9, children: 0
+Sue 442: goldfish: 7, cars: 2, vizslas: 8
+Sue 443: goldfish: 6, samoyeds: 3, perfumes: 2
+Sue 444: trees: 2, goldfish: 7, cars: 8
+Sue 445: trees: 2, pomeranians: 0, children: 0
+Sue 446: perfumes: 4, akitas: 4, goldfish: 6
+Sue 447: vizslas: 7, akitas: 9, cars: 3
+Sue 448: goldfish: 6, trees: 9, cars: 0
+Sue 449: samoyeds: 7, perfumes: 4, vizslas: 10
+Sue 450: akitas: 7, cars: 10, goldfish: 7
+Sue 451: goldfish: 4, children: 7, pomeranians: 4
+Sue 452: cats: 4, vizslas: 6, trees: 7
+Sue 453: cars: 1, trees: 10, goldfish: 9
+Sue 454: trees: 2, goldfish: 3, vizslas: 10
+Sue 455: pomeranians: 9, vizslas: 3, akitas: 2
+Sue 456: vizslas: 10, akitas: 2, goldfish: 1
+Sue 457: trees: 5, cats: 5, children: 8
+Sue 458: cars: 6, goldfish: 3, akitas: 9
+Sue 459: goldfish: 7, akitas: 2, cats: 7
+Sue 460: akitas: 1, cars: 5, children: 8
+Sue 461: cars: 8, perfumes: 0, goldfish: 6
+Sue 462: pomeranians: 6, cats: 2, perfumes: 6
+Sue 463: vizslas: 7, perfumes: 3, goldfish: 3
+Sue 464: akitas: 10, goldfish: 10, trees: 1
+Sue 465: vizslas: 0, akitas: 2, trees: 2
+Sue 466: perfumes: 6, akitas: 8, cars: 2
+Sue 467: goldfish: 1, cars: 10, perfumes: 3
+Sue 468: goldfish: 4, trees: 2, cars: 9
+Sue 469: perfumes: 6, pomeranians: 0, vizslas: 10
+Sue 470: samoyeds: 8, children: 0, akitas: 7
+Sue 471: children: 3, goldfish: 9, cats: 9
+Sue 472: samoyeds: 0, goldfish: 0, trees: 0
+Sue 473: trees: 3, goldfish: 4, vizslas: 1
+Sue 474: perfumes: 10, cars: 3, trees: 7
+Sue 475: akitas: 5, vizslas: 4, goldfish: 5
+Sue 476: children: 2, akitas: 7, vizslas: 3
+Sue 477: vizslas: 6, pomeranians: 9, trees: 6
+Sue 478: vizslas: 7, pomeranians: 6, akitas: 7
+Sue 479: trees: 2, perfumes: 2, children: 2
+Sue 480: cars: 8, cats: 5, vizslas: 0
+Sue 481: trees: 5, goldfish: 0, akitas: 3
+Sue 482: cars: 8, perfumes: 6, goldfish: 10
+Sue 483: goldfish: 0, cars: 3, perfumes: 10
+Sue 484: pomeranians: 1, samoyeds: 1, perfumes: 3
+Sue 485: trees: 0, akitas: 2, vizslas: 4
+Sue 486: cars: 3, vizslas: 8, goldfish: 1
+Sue 487: pomeranians: 9, vizslas: 2, children: 10
+Sue 488: akitas: 6, vizslas: 10, perfumes: 9
+Sue 489: goldfish: 6, vizslas: 4, cars: 2
+Sue 490: vizslas: 10, cats: 8, samoyeds: 1
+Sue 491: cats: 9, cars: 1, perfumes: 10
+Sue 492: goldfish: 6, cars: 9, pomeranians: 9
+Sue 493: children: 10, goldfish: 10, vizslas: 0
+Sue 494: pomeranians: 5, cars: 0, vizslas: 0
+Sue 495: vizslas: 7, perfumes: 6, samoyeds: 3
+Sue 496: trees: 1, cats: 4, cars: 10
+Sue 497: cats: 1, perfumes: 0, cars: 7
+Sue 498: perfumes: 7, vizslas: 6, cats: 9
+Sue 499: vizslas: 8, perfumes: 1, akitas: 3
+Sue 500: perfumes: 4, cars: 9, trees: 4

From fc2cad488b519fede26af783e78936643fbec82d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:19:08 +0100
Subject: [PATCH 064/100] 2015: d16: ex2: add solution

---
 2015/d16/ex2/ex2.py | 69 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100755 2015/d16/ex2/ex2.py

diff --git a/2015/d16/ex2/ex2.py b/2015/d16/ex2/ex2.py
new file mode 100755
index 0000000..5711b59
--- /dev/null
+++ b/2015/d16/ex2/ex2.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+
+import sys
+from typing import NamedTuple
+
+
+class Sue(NamedTuple):
+    children: int | None = None
+    cats: int | None = None
+    samoyeds: int | None = None
+    pomeranians: int | None = None
+    akitas: int | None = None
+    vizslas: int | None = None
+    goldfish: int | None = None
+    trees: int | None = None
+    cars: int | None = None
+    perfumes: int | None = None
+
+    def matches(self, reading: dict[str, int | None]) -> bool:
+        for name, expected in reading.items():
+            assert expected is not None  # Sanity check
+            val = getattr(self, name)
+            if name in ("cats", "trees"):
+                if val is not None and val <= expected:
+                    return False
+            elif name in ("pomeranians", "goldfish"):
+                if val is not None and val >= expected:
+                    return False
+            else:
+                if val is not None and val != expected:
+                    return False
+        return True
+
+
+def solve(input: str) -> int:
+    def parse_line(input: str) -> Sue:
+        _, other = input.split(": ", 1)
+        raw_items = other.split(", ")
+        items = {
+            name: int(val) for name, val in (item.split(": ") for item in raw_items)
+        }
+        return Sue(**items)
+
+    def parse(input: str) -> list[Sue]:
+        return [parse_line(line) for line in input.splitlines()]
+
+    aunts = parse(input)
+    reading = Sue(
+        children=3,
+        cats=7,
+        samoyeds=2,
+        pomeranians=3,
+        akitas=0,
+        vizslas=0,
+        goldfish=5,
+        trees=3,
+        cars=2,
+        perfumes=1,
+    )
+    return next(i for i, sue in enumerate(aunts, 1) if sue.matches(reading._asdict()))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 89caeed1573c0812473e4df6e9b4895081e3f3fb Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:25:32 +0100
Subject: [PATCH 065/100] 2015: d17: ex1: add input

---
 2015/d17/ex1/input | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 2015/d17/ex1/input

diff --git a/2015/d17/ex1/input b/2015/d17/ex1/input
new file mode 100644
index 0000000..09ebd46
--- /dev/null
+++ b/2015/d17/ex1/input
@@ -0,0 +1,20 @@
+43
+3
+4
+10
+21
+44
+4
+6
+47
+41
+34
+17
+17
+44
+36
+31
+46
+9
+27
+38

From a6a126cc3da523d04135df13223b7d7cc81d608e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:26:24 +0100
Subject: [PATCH 066/100] 2015: d17: ex1: add solution

---
 2015/d17/ex1/ex1.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 2015/d17/ex1/ex1.py

diff --git a/2015/d17/ex1/ex1.py b/2015/d17/ex1/ex1.py
new file mode 100755
index 0000000..8cbeb5b
--- /dev/null
+++ b/2015/d17/ex1/ex1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+
+TOTAL_EGGNOG = 150
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[int]:
+        return [int(line) for line in input.splitlines()]
+
+    containers = parse(input)
+    return sum(
+        sum(combination) == TOTAL_EGGNOG
+        for combination in itertools.chain.from_iterable(
+            itertools.combinations(containers, i) for i in range(1, len(containers) + 1)
+        )
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 6b2144fd2e67b2ba6ff063a8cd97f8f6a694c3f6 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:26:30 +0100
Subject: [PATCH 067/100] 2015: d17: ex2: add input

---
 2015/d17/ex2/input | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 2015/d17/ex2/input

diff --git a/2015/d17/ex2/input b/2015/d17/ex2/input
new file mode 100644
index 0000000..09ebd46
--- /dev/null
+++ b/2015/d17/ex2/input
@@ -0,0 +1,20 @@
+43
+3
+4
+10
+21
+44
+4
+6
+47
+41
+34
+17
+17
+44
+36
+31
+46
+9
+27
+38

From 86cdf0c8b6eb2cb8172ebfbab35eb5572b6a5dbf Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 22:26:44 +0100
Subject: [PATCH 068/100] 2015: d17: ex2: add solution

---
 2015/d17/ex2/ex2.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 2015/d17/ex2/ex2.py

diff --git a/2015/d17/ex2/ex2.py b/2015/d17/ex2/ex2.py
new file mode 100755
index 0000000..1c1cdda
--- /dev/null
+++ b/2015/d17/ex2/ex2.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+
+TOTAL_EGGNOG = 150
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[int]:
+        return [int(line) for line in input.splitlines()]
+
+    containers = parse(input)
+    min_containers = min(
+        i
+        for i in range(1, len(containers) + 1)
+        if any(
+            sum(combination) == TOTAL_EGGNOG
+            for combination in itertools.combinations(containers, i)
+        )
+    )
+    return sum(
+        sum(combination) == TOTAL_EGGNOG
+        for combination in itertools.combinations(containers, min_containers)
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From c7bdbede809b1e49759c12dad120e618ab5b44c4 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 23:06:21 +0100
Subject: [PATCH 069/100] 2015: d18: ex1: add input

---
 2015/d18/ex1/input | 100 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 2015/d18/ex1/input

diff --git a/2015/d18/ex1/input b/2015/d18/ex1/input
new file mode 100644
index 0000000..e91a2a7
--- /dev/null
+++ b/2015/d18/ex1/input
@@ -0,0 +1,100 @@
+###.##..##.#..#.##...#..#.####..#.##.##.##..###...#....#...###..#..###..###.#.#.#..#.##..#...##.#..#
+.#...##.#####..##.......#..####.###.##.#..###.###.....#.#.####.##.###..##...###....#.##.....#.#.#.##
+.....#.#.....#..###..####..#.....##.#..###.####.#.######..##......#####.#.##.#########.###..#.##.#.#
+...###......#.#..###..#.#.....#.##..#.##..###...#.##.#..#..#.##.#..##......##.##.##.######...#....##
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From 03e99e9d07b0182589c005d1203b36445ec10970 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 23:06:32 +0100
Subject: [PATCH 070/100] 2015: d18: ex1: add solution

---
 2015/d18/ex1/ex1.py | 57 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100755 2015/d18/ex1/ex1.py

diff --git a/2015/d18/ex1/ex1.py b/2015/d18/ex1/ex1.py
new file mode 100755
index 0000000..4c9aec2
--- /dev/null
+++ b/2015/d18/ex1/ex1.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> set[Point]:
+        return {
+            Point(x, y)
+            for x, line in enumerate(input.splitlines())
+            for y, c in enumerate(line)
+            if c == "#"
+        }
+
+    def neighbours(p: Point) -> Iterator[Point]:
+        for dx, dy in itertools.product((-1, 0, 1), repeat=2):
+            if dx == 0 and dy == 0:
+                continue
+            yield Point(p.x + dx, p.y + dy)
+
+    def step(lights: set[Point], dimensions: Point) -> set[Point]:
+        res: set[Point] = set()
+        for p in map(
+            Point._make,
+            itertools.product(range(dimensions.x), range(dimensions.y)),
+        ):
+            num_alive = sum(n in lights for n in neighbours(p))
+            if p in lights and num_alive not in (2, 3):
+                continue
+            if p not in lights and num_alive != 3:
+                continue
+            res.add(p)
+
+        return res
+
+    lights = parse(input)
+    dimensions = Point(100, 100)
+    for _ in range(100):
+        lights = step(lights, dimensions)
+    return len(lights)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From ebf5f6307a407474981132dd1fa6cfa08d86c9b7 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 23:06:38 +0100
Subject: [PATCH 071/100] 2015: d18: ex2: add input

---
 2015/d18/ex2/input | 100 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 2015/d18/ex2/input

diff --git a/2015/d18/ex2/input b/2015/d18/ex2/input
new file mode 100644
index 0000000..e91a2a7
--- /dev/null
+++ b/2015/d18/ex2/input
@@ -0,0 +1,100 @@
+###.##..##.#..#.##...#..#.####..#.##.##.##..###...#....#...###..#..###..###.#.#.#..#.##..#...##.#..#
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+.#.###...#.#.#.##.###..###...##..#.##.##..##..#.....###.#..#.##.##.####........##.#####.#.#....#...#
+##...##..#.##.#######.###.#.##.#####....##.....##.#.....#.#.##.#....#.##.#....##.#..#.###..#..#.#...
+.#..#.#.#.#...#.##...###.##.#.#...###.##...#.#..###....###.#.###...##..###..#..##.##....###...###.##

From 68d99c78904c8bf111f219f1444ce96c56ff5226 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 21 May 2025 23:06:42 +0100
Subject: [PATCH 072/100] 2015: d18: ex2: add solution

---
 2015/d18/ex2/ex2.py | 70 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100755 2015/d18/ex2/ex2.py

diff --git a/2015/d18/ex2/ex2.py b/2015/d18/ex2/ex2.py
new file mode 100755
index 0000000..f39b6da
--- /dev/null
+++ b/2015/d18/ex2/ex2.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> set[Point]:
+        return {
+            Point(x, y)
+            for x, line in enumerate(input.splitlines())
+            for y, c in enumerate(line)
+            if c == "#"
+        }
+
+    def neighbours(p: Point) -> Iterator[Point]:
+        for dx, dy in itertools.product((-1, 0, 1), repeat=2):
+            if dx == 0 and dy == 0:
+                continue
+            yield Point(p.x + dx, p.y + dy)
+
+    def step(lights: set[Point], dimensions: Point) -> set[Point]:
+        res = {
+            # Four corners are stuck on
+            Point(0, 0),
+            Point(0, dimensions.y - 1),
+            Point(dimensions.x - 1, 0),
+            Point(dimensions.x - 1, dimensions.y - 1),
+        }
+        for p in map(
+            Point._make,
+            itertools.product(range(dimensions.x), range(dimensions.y)),
+        ):
+            num_alive = sum(n in lights for n in neighbours(p))
+            if p in lights and num_alive not in (2, 3):
+                continue
+            if p not in lights and num_alive != 3:
+                continue
+            res.add(p)
+
+        return res
+
+    lights = parse(input)
+    dimensions = Point(100, 100)
+    lights |= {
+        # Four corners are stuck on
+        Point(0, 0),
+        Point(0, dimensions.y - 1),
+        Point(dimensions.x - 1, 0),
+        Point(dimensions.x - 1, dimensions.y - 1),
+    }
+    for _ in range(100):
+        lights = step(lights, dimensions)
+    return len(lights)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e275f1f03cc313450a5f1111e5a9fb5df441599a Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:23:47 +0100
Subject: [PATCH 073/100] 2015: d19: ex1: add input

---
 2015/d19/ex1/input | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 2015/d19/ex1/input

diff --git a/2015/d19/ex1/input b/2015/d19/ex1/input
new file mode 100644
index 0000000..806774f
--- /dev/null
+++ b/2015/d19/ex1/input
@@ -0,0 +1,45 @@
+Al => ThF
+Al => ThRnFAr
+B => BCa
+B => TiB
+B => TiRnFAr
+Ca => CaCa
+Ca => PB
+Ca => PRnFAr
+Ca => SiRnFYFAr
+Ca => SiRnMgAr
+Ca => SiTh
+F => CaF
+F => PMg
+F => SiAl
+H => CRnAlAr
+H => CRnFYFYFAr
+H => CRnFYMgAr
+H => CRnMgYFAr
+H => HCa
+H => NRnFYFAr
+H => NRnMgAr
+H => NTh
+H => OB
+H => ORnFAr
+Mg => BF
+Mg => TiMg
+N => CRnFAr
+N => HSi
+O => CRnFYFAr
+O => CRnMgAr
+O => HP
+O => NRnFAr
+O => OTi
+P => CaP
+P => PTi
+P => SiRnFAr
+Si => CaSi
+Th => ThCa
+Ti => BP
+Ti => TiTi
+e => HF
+e => NAl
+e => OMg
+
+CRnCaSiRnBSiRnFArTiBPTiTiBFArPBCaSiThSiRnTiBPBPMgArCaSiRnTiMgArCaSiThCaSiRnFArRnSiRnFArTiTiBFArCaCaSiRnSiThCaCaSiRnMgArFYSiRnFYCaFArSiThCaSiThPBPTiMgArCaPRnSiAlArPBCaCaSiRnFYSiThCaRnFArArCaCaSiRnPBSiRnFArMgYCaCaCaCaSiThCaCaSiAlArCaCaSiRnPBSiAlArBCaCaCaCaSiThCaPBSiThPBPBCaSiRnFYFArSiThCaSiRnFArBCaCaSiRnFYFArSiThCaPBSiThCaSiRnPMgArRnFArPTiBCaPRnFArCaCaCaCaSiRnCaCaSiRnFYFArFArBCaSiThFArThSiThSiRnTiRnPMgArFArCaSiThCaPBCaSiRnBFArCaCaPRnCaCaPMgArSiRnFYFArCaSiThRnPBPMgAr

From 9d15c56597c8f14e380c07799eaa2b8bb7d1949c Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:23:54 +0100
Subject: [PATCH 074/100] 2015: d19: ex1: add solution

---
 2015/d19/ex1/ex1.py | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100755 2015/d19/ex1/ex1.py

diff --git a/2015/d19/ex1/ex1.py b/2015/d19/ex1/ex1.py
new file mode 100755
index 0000000..4f038b2
--- /dev/null
+++ b/2015/d19/ex1/ex1.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+from collections.abc import Iterator
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> tuple[dict[str, list[str]], str]:
+        raw_replacements, molecule = input.strip().split("\n\n")
+        res: dict[str, list[str]] = collections.defaultdict(list)
+        for start, end in (
+            line.split(" => ") for line in raw_replacements.splitlines()
+        ):
+            res[start].append(end)
+        return res, molecule
+
+    def replace_needle(input: str, needle: str, to: str) -> Iterator[str]:
+        assert needle in input  # Sanity check
+        i = input.find(needle)
+        while i != -1:
+            yield input[:i] + to + input[i + len(needle) :]
+            i = input.find(needle, i + 1)
+
+    def do_replacements(
+        replacements: dict[str, list[str]], molecule: str
+    ) -> Iterator[str]:
+        for needle, vals in replacements.items():
+            if needle not in molecule:
+                continue
+            for to in vals:
+                yield from replace_needle(molecule, needle, to)
+
+    replacements, molecule = parse(input)
+    new_molecules = set(do_replacements(replacements, molecule))
+    return len(new_molecules)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e4ffdd2bfb607e2b189327275071c1b39c4b0a46 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:23:59 +0100
Subject: [PATCH 075/100] 2015: d19: ex2: add input

---
 2015/d19/ex2/input | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 2015/d19/ex2/input

diff --git a/2015/d19/ex2/input b/2015/d19/ex2/input
new file mode 100644
index 0000000..806774f
--- /dev/null
+++ b/2015/d19/ex2/input
@@ -0,0 +1,45 @@
+Al => ThF
+Al => ThRnFAr
+B => BCa
+B => TiB
+B => TiRnFAr
+Ca => CaCa
+Ca => PB
+Ca => PRnFAr
+Ca => SiRnFYFAr
+Ca => SiRnMgAr
+Ca => SiTh
+F => CaF
+F => PMg
+F => SiAl
+H => CRnAlAr
+H => CRnFYFYFAr
+H => CRnFYMgAr
+H => CRnMgYFAr
+H => HCa
+H => NRnFYFAr
+H => NRnMgAr
+H => NTh
+H => OB
+H => ORnFAr
+Mg => BF
+Mg => TiMg
+N => CRnFAr
+N => HSi
+O => CRnFYFAr
+O => CRnMgAr
+O => HP
+O => NRnFAr
+O => OTi
+P => CaP
+P => PTi
+P => SiRnFAr
+Si => CaSi
+Th => ThCa
+Ti => BP
+Ti => TiTi
+e => HF
+e => NAl
+e => OMg
+
+CRnCaSiRnBSiRnFArTiBPTiTiBFArPBCaSiThSiRnTiBPBPMgArCaSiRnTiMgArCaSiThCaSiRnFArRnSiRnFArTiTiBFArCaCaSiRnSiThCaCaSiRnMgArFYSiRnFYCaFArSiThCaSiThPBPTiMgArCaPRnSiAlArPBCaCaSiRnFYSiThCaRnFArArCaCaSiRnPBSiRnFArMgYCaCaCaCaSiThCaCaSiAlArCaCaSiRnPBSiAlArBCaCaCaCaSiThCaPBSiThPBPBCaSiRnFYFArSiThCaSiRnFArBCaCaSiRnFYFArSiThCaPBSiThCaSiRnPMgArRnFArPTiBCaPRnFArCaCaCaCaSiRnCaCaSiRnFYFArFArBCaSiThFArThSiThSiRnTiRnPMgArFArCaSiThCaPBCaSiRnBFArCaCaPRnCaCaPMgArSiRnFYFArCaSiThRnPBPMgAr

From 54a04e458a67ee0a3796748c76dd83511d53d946 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:24:09 +0100
Subject: [PATCH 076/100] 2015: d19: ex2: add solution

---
 2015/d19/ex2/ex2.py | 49 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100755 2015/d19/ex2/ex2.py

diff --git a/2015/d19/ex2/ex2.py b/2015/d19/ex2/ex2.py
new file mode 100755
index 0000000..4195e9b
--- /dev/null
+++ b/2015/d19/ex2/ex2.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> tuple[dict[str, list[str]], str]:
+        raw_replacements, molecule = input.strip().split("\n\n")
+        res: dict[str, list[str]] = collections.defaultdict(list)
+        for start, end in (
+            line.split(" => ") for line in raw_replacements.splitlines()
+        ):
+            res[start].append(end)
+        return res, molecule
+
+    def inverse(input: dict[str, list[str]]) -> dict[str, str]:
+        res: dict[str, str] = {}
+        for key, vals in input.items():
+            for val in vals:
+                res[val] = key
+        assert len(res) == sum(map(len, input.values()))  # Sanity check
+        return res
+
+    def build(replacements: dict[str, list[str]], molecule: str) -> int:
+        # We will be "building down" to the electron, so inverse the replacement mapping
+        inversed_replacements = inverse(replacements)
+        # Order the replacement needles to try the longest ones first
+        needles = sorted(inversed_replacements.keys(), key=len, reverse=True)
+        res = 0
+        while molecule != "e":
+            for needle in needles:
+                if needle not in molecule:
+                    continue
+                res += 1
+                molecule = molecule.replace(needle, inversed_replacements[needle], 1)
+        return res
+
+    replacements, molecule = parse(input)
+    return build(replacements, molecule)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 8d739cd487fc77dabd1e64a66d23f69bb5ea2bc2 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:43:43 +0100
Subject: [PATCH 077/100] 2015: d20: ex1: add input

---
 2015/d20/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d20/ex1/input

diff --git a/2015/d20/ex1/input b/2015/d20/ex1/input
new file mode 100644
index 0000000..f0d8336
--- /dev/null
+++ b/2015/d20/ex1/input
@@ -0,0 +1 @@
+36000000

From 4c511702fc5b2244c63560051e4994f9be309c7e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:43:54 +0100
Subject: [PATCH 078/100] 2015: d20: ex1: add solution

---
 2015/d20/ex1/ex1.py | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100755 2015/d20/ex1/ex1.py

diff --git a/2015/d20/ex1/ex1.py b/2015/d20/ex1/ex1.py
new file mode 100755
index 0000000..5892642
--- /dev/null
+++ b/2015/d20/ex1/ex1.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    needed = int(input.strip())
+    presents = [0] * (needed // 10)  # Surely this should be enough houses
+    for i in range(1, len(presents)):
+        for j in range(i, len(presents), i):
+            presents[j] += 10 * i
+    for i, total in enumerate(presents):
+        if total >= needed:
+            return i
+    assert False  # Sanity check
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 0259d9bbf797ebbfbc6bb23b7b070b9945ce70ef Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:43:59 +0100
Subject: [PATCH 079/100] 2015: d20: ex2: add input

---
 2015/d20/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d20/ex2/input

diff --git a/2015/d20/ex2/input b/2015/d20/ex2/input
new file mode 100644
index 0000000..f0d8336
--- /dev/null
+++ b/2015/d20/ex2/input
@@ -0,0 +1 @@
+36000000

From 235f801f412f4fd60c0cb5504a3a57fd7d129c37 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 00:44:09 +0100
Subject: [PATCH 080/100] 2015: d20: ex2: add solution

---
 2015/d20/ex2/ex2.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 2015/d20/ex2/ex2.py

diff --git a/2015/d20/ex2/ex2.py b/2015/d20/ex2/ex2.py
new file mode 100755
index 0000000..1d7c373
--- /dev/null
+++ b/2015/d20/ex2/ex2.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    needed = int(input.strip())
+    presents = [0] * (needed // 10)  # Surely this should be enough houses
+    for i in range(1, len(presents)):
+        for j in range(1, 50 + 1):
+            if (i * j) >= len(presents):
+                continue
+            presents[i * j] += 11 * i
+    for i, total in enumerate(presents):
+        if total >= needed:
+            return i
+    assert False  # Sanity check
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From ae67526c409b0068fb570f8a0112de410039d108 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 01:10:46 +0100
Subject: [PATCH 081/100] 2015: d21: ex1: add input

---
 2015/d21/ex1/input | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 2015/d21/ex1/input

diff --git a/2015/d21/ex1/input b/2015/d21/ex1/input
new file mode 100644
index 0000000..c5f2409
--- /dev/null
+++ b/2015/d21/ex1/input
@@ -0,0 +1,3 @@
+Hit Points: 109
+Damage: 8
+Armor: 2

From d9406a42581ec0d7febaaee764c5341f11fd2f99 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 01:10:52 +0100
Subject: [PATCH 082/100] 2015: d21: ex1: add solution

---
 2015/d21/ex1/ex1.py | 104 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100755 2015/d21/ex1/ex1.py

diff --git a/2015/d21/ex1/ex1.py b/2015/d21/ex1/ex1.py
new file mode 100755
index 0000000..3dfc88d
--- /dev/null
+++ b/2015/d21/ex1/ex1.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Ennemy(NamedTuple):
+    hp: int
+    damage: int
+    armor: int
+
+    def attack(self, other: "Ennemy") -> "Ennemy":
+        return Ennemy(
+            other.hp - max(1, self.damage - other.armor),
+            other.damage,
+            other.armor,
+        )
+
+
+class Item(NamedTuple):
+    cost: int
+    damage: int
+    armor: int
+
+
+WEAPONS = {
+    "Dagger": Item(8, 4, 0),
+    "Shortsword": Item(10, 5, 0),
+    "Warhammer": Item(25, 6, 0),
+    "Longsword": Item(40, 7, 0),
+    "Greataxe": Item(74, 8, 0),
+}
+ARMORS = {
+    "Leather": Item(13, 0, 1),
+    "Chainmail": Item(31, 0, 2),
+    "Splintmail": Item(53, 0, 3),
+    "Bandedmail": Item(75, 0, 4),
+    "Platemail": Item(102, 0, 5),
+}
+RINGS = {
+    "Damage +1": Item(25, 1, 0),
+    "Damage +2": Item(50, 2, 0),
+    "Damage +3": Item(100, 3, 0),
+    "Defense +1": Item(20, 0, 1),
+    "Defense +2": Item(40, 0, 2),
+    "Defense +3": Item(80, 0, 3),
+}
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> Ennemy:
+        return Ennemy(*map(int, (line.split(": ")[1] for line in input.splitlines())))
+
+    def choose_items() -> Iterator[list[Item]]:
+        allowed_weapons = [1]
+        allowed_armors = [0, 1]
+        allowed_rings = [0, 1, 2]
+
+        for weapons, armors, rings in itertools.product(
+            itertools.chain.from_iterable(
+                itertools.combinations(WEAPONS.values(), i) for i in allowed_weapons
+            ),
+            itertools.chain.from_iterable(
+                itertools.combinations(ARMORS.values(), i) for i in allowed_armors
+            ),
+            itertools.chain.from_iterable(
+                itertools.combinations(RINGS.values(), i) for i in allowed_rings
+            ),
+        ):
+            yield list(itertools.chain(weapons, armors, rings))
+
+    def assemble_inventory(items: list[Item]) -> Ennemy:
+        return Ennemy(
+            hp=100,
+            damage=sum(item.damage for item in items),
+            armor=sum(item.armor for item in items),
+        )
+
+    def battle(us: Ennemy, ennemy: Ennemy) -> bool:
+        while True:
+            ennemy = us.attack(ennemy)
+            if ennemy.hp <= 0:
+                return True
+            us = ennemy.attack(us)
+            if us.hp <= 0:
+                return False
+
+    ennemy = parse(input)
+    return min(
+        sum(item.cost for item in items)
+        for items in choose_items()
+        if battle(assemble_inventory(items), ennemy)
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e3db77cae2ba5098a70524f10b3dc17332a850b3 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 01:10:57 +0100
Subject: [PATCH 083/100] 2015: d21: ex2: add input

---
 2015/d21/ex2/input | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 2015/d21/ex2/input

diff --git a/2015/d21/ex2/input b/2015/d21/ex2/input
new file mode 100644
index 0000000..c5f2409
--- /dev/null
+++ b/2015/d21/ex2/input
@@ -0,0 +1,3 @@
+Hit Points: 109
+Damage: 8
+Armor: 2

From 6a11f30a2facac445a808555fe7635a4e16003ad Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 01:11:01 +0100
Subject: [PATCH 084/100] 2015: d21: ex2: add solution

---
 2015/d21/ex2/ex2.py | 104 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100755 2015/d21/ex2/ex2.py

diff --git a/2015/d21/ex2/ex2.py b/2015/d21/ex2/ex2.py
new file mode 100755
index 0000000..eca2485
--- /dev/null
+++ b/2015/d21/ex2/ex2.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+import itertools
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Ennemy(NamedTuple):
+    hp: int
+    damage: int
+    armor: int
+
+    def attack(self, other: "Ennemy") -> "Ennemy":
+        return Ennemy(
+            other.hp - max(1, self.damage - other.armor),
+            other.damage,
+            other.armor,
+        )
+
+
+class Item(NamedTuple):
+    cost: int
+    damage: int
+    armor: int
+
+
+WEAPONS = {
+    "Dagger": Item(8, 4, 0),
+    "Shortsword": Item(10, 5, 0),
+    "Warhammer": Item(25, 6, 0),
+    "Longsword": Item(40, 7, 0),
+    "Greataxe": Item(74, 8, 0),
+}
+ARMORS = {
+    "Leather": Item(13, 0, 1),
+    "Chainmail": Item(31, 0, 2),
+    "Splintmail": Item(53, 0, 3),
+    "Bandedmail": Item(75, 0, 4),
+    "Platemail": Item(102, 0, 5),
+}
+RINGS = {
+    "Damage +1": Item(25, 1, 0),
+    "Damage +2": Item(50, 2, 0),
+    "Damage +3": Item(100, 3, 0),
+    "Defense +1": Item(20, 0, 1),
+    "Defense +2": Item(40, 0, 2),
+    "Defense +3": Item(80, 0, 3),
+}
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> Ennemy:
+        return Ennemy(*map(int, (line.split(": ")[1] for line in input.splitlines())))
+
+    def choose_items() -> Iterator[list[Item]]:
+        allowed_weapons = [1]
+        allowed_armors = [0, 1]
+        allowed_rings = [0, 1, 2]
+
+        for weapons, armors, rings in itertools.product(
+            itertools.chain.from_iterable(
+                itertools.combinations(WEAPONS.values(), i) for i in allowed_weapons
+            ),
+            itertools.chain.from_iterable(
+                itertools.combinations(ARMORS.values(), i) for i in allowed_armors
+            ),
+            itertools.chain.from_iterable(
+                itertools.combinations(RINGS.values(), i) for i in allowed_rings
+            ),
+        ):
+            yield list(itertools.chain(weapons, armors, rings))
+
+    def assemble_inventory(items: list[Item]) -> Ennemy:
+        return Ennemy(
+            hp=100,
+            damage=sum(item.damage for item in items),
+            armor=sum(item.armor for item in items),
+        )
+
+    def battle(us: Ennemy, ennemy: Ennemy) -> bool:
+        while True:
+            ennemy = us.attack(ennemy)
+            if ennemy.hp <= 0:
+                return True
+            us = ennemy.attack(us)
+            if us.hp <= 0:
+                return False
+
+    ennemy = parse(input)
+    return max(
+        sum(item.cost for item in items)
+        for items in choose_items()
+        if not battle(assemble_inventory(items), ennemy)
+    )
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From d045384d20d6f03362de9e3d2bd537bf3877b003 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 02:44:02 +0100
Subject: [PATCH 085/100] 2015: d22: ex1: add input

---
 2015/d22/ex1/input | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 2015/d22/ex1/input

diff --git a/2015/d22/ex1/input b/2015/d22/ex1/input
new file mode 100644
index 0000000..afff321
--- /dev/null
+++ b/2015/d22/ex1/input
@@ -0,0 +1,2 @@
+Hit Points: 51
+Damage: 9

From 43018d1302865d72144030887d41155654617649 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 02:44:17 +0100
Subject: [PATCH 086/100] 2015: d22: ex1: add solution

---
 2015/d22/ex1/ex1.py | 166 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100755 2015/d22/ex1/ex1.py

diff --git a/2015/d22/ex1/ex1.py b/2015/d22/ex1/ex1.py
new file mode 100755
index 0000000..25cbd5b
--- /dev/null
+++ b/2015/d22/ex1/ex1.py
@@ -0,0 +1,166 @@
+#!/usr/bin/env python
+
+import heapq
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Ennemy(NamedTuple):
+    hp: int
+    damage: int
+
+
+class Effects(NamedTuple):
+    # Effect is active is it is greater or equal to zero
+    shield: int = -1
+    poison: int = -1
+    recharge: int = -1
+
+    def tick(self) -> "Effects":
+        return Effects(*(n - 1 for n in self))
+
+    def shield_active(self) -> bool:
+        return self.shield >= 0
+
+    def poison_active(self) -> bool:
+        return self.poison >= 0
+
+    def recharge_active(self) -> bool:
+        return self.recharge >= 0
+
+    def with_shield(self) -> "Effects":
+        assert self.shield <= 0  # Sanity check
+        return self._replace(shield=6)
+
+    def with_poison(self) -> "Effects":
+        assert self.poison <= 0  # Sanity check
+        return self._replace(poison=6)
+
+    def with_recharge(self) -> "Effects":
+        assert self.recharge <= 0  # Sanity check
+        return self._replace(recharge=5)
+
+
+class Player(NamedTuple):
+    hp: int
+    mana: int
+    effects: Effects
+
+
+MISSILE = 53
+DRAIN = 73
+SHIELD = 113
+POISON = 173
+RECHARGE = 229
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> Ennemy:
+        return Ennemy(*map(int, (line.split(": ")[1] for line in input.splitlines())))
+
+    def step(player: Player, ennemy: Ennemy) -> Iterator[tuple[int, Player, Ennemy]]:
+        def tick_spells(player: Player, ennemy: Ennemy) -> tuple[Player, Ennemy]:
+            player = player._replace(effects=player.effects.tick())
+            if player.effects.recharge_active():
+                player = player._replace(mana=player.mana + 101)
+            if player.effects.poison_active():
+                ennemy = ennemy._replace(hp=ennemy.hp - 3)
+            return player, ennemy
+
+        # Note: does *not* drain the mana for the spell
+        def possible_spells(
+            player: Player,
+            ennemy: Ennemy,
+        ) -> Iterator[tuple[int, Player, Ennemy]]:
+            if player.mana >= MISSILE:
+                yield (
+                    MISSILE,
+                    player,
+                    ennemy._replace(hp=ennemy.hp - 4),
+                )
+            if player.mana >= DRAIN:
+                yield (
+                    DRAIN,
+                    player._replace(hp=player.hp + 2),
+                    ennemy._replace(hp=ennemy.hp - 2),
+                )
+            if player.mana >= SHIELD and player.effects.shield <= 0:
+                yield (
+                    SHIELD,
+                    player._replace(effects=player.effects.with_shield()),
+                    ennemy,
+                )
+            if player.mana >= POISON and player.effects.poison <= 0:
+                yield (
+                    POISON,
+                    player._replace(effects=player.effects.with_poison()),
+                    ennemy,
+                )
+            if player.mana >= RECHARGE and player.effects.recharge <= 0:
+                yield (
+                    RECHARGE,
+                    player._replace(effects=player.effects.with_recharge()),
+                    ennemy,
+                )
+
+        def boss_turn(player: Player, ennemy: Ennemy) -> tuple[Player, Ennemy]:
+            # Spells are ticked at start of turn
+            player, ennemy = tick_spells(player, ennemy)
+
+            # Ennemy can't attack if they're dead
+            if ennemy.hp <= 0:
+                return player, ennemy
+
+            armor = 7 if player.effects.shield_active() else 0
+            damage = max(1, ennemy.damage - armor)
+            return player._replace(hp=player.hp - damage), ennemy
+
+        # We lose if we run out of hp
+        if player.hp <= 0:
+            return
+
+        # Spells are ticked at start of turn
+        player, ennemy = tick_spells(player, ennemy)
+
+        # Don't spend a spell if the ennemy is already dead
+        if ennemy.hp <= 0:
+            yield 0, player, ennemy
+
+        for cost, player, ennemy in possible_spells(player, ennemy):
+            yield cost, *boss_turn(player._replace(mana=player.mana - cost), ennemy)
+
+    def dijkstra(player: Player, ennemy: Ennemy) -> int:
+        # Priority queue of (mana_spent, player, ennemy)
+        queue = [(0, player, ennemy)]
+        seen: set[tuple[Player, Ennemy]] = set()
+
+        while len(queue) > 0:
+            total_cost, p, e = heapq.heappop(queue)
+            if p.hp <= 0:
+                continue
+            if e.hp <= 0:
+                return total_cost
+            # We must have seen (p, e) with a smaller distance before
+            if (p, e) in seen:
+                continue
+            # First time encountering (p, e), must be the smallest distance to it
+            seen.add((p, e))
+            # Add all neighbours to be visited
+            for cost, p, e in step(p, e):
+                heapq.heappush(queue, (total_cost + cost, p, e))
+
+        assert False  # Sanity check
+
+    ennemy = parse(input)
+    player = Player(50, 500, Effects())
+    return dijkstra(player, ennemy)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 6d4fb1e41867b1d850469540393fb04368ae9a69 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 02:44:22 +0100
Subject: [PATCH 087/100] 2015: d22: ex2: add input

---
 2015/d22/ex2/input | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 2015/d22/ex2/input

diff --git a/2015/d22/ex2/input b/2015/d22/ex2/input
new file mode 100644
index 0000000..afff321
--- /dev/null
+++ b/2015/d22/ex2/input
@@ -0,0 +1,2 @@
+Hit Points: 51
+Damage: 9

From 1ecb0bf7be2d5cc3770235cc091aba1f138f4f5e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 02:44:26 +0100
Subject: [PATCH 088/100] 2015: d22: ex2: add solution

---
 2015/d22/ex2/ex2.py | 168 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100755 2015/d22/ex2/ex2.py

diff --git a/2015/d22/ex2/ex2.py b/2015/d22/ex2/ex2.py
new file mode 100755
index 0000000..af74f23
--- /dev/null
+++ b/2015/d22/ex2/ex2.py
@@ -0,0 +1,168 @@
+#!/usr/bin/env python
+
+import heapq
+import sys
+from collections.abc import Iterator
+from typing import NamedTuple
+
+
+class Ennemy(NamedTuple):
+    hp: int
+    damage: int
+
+
+class Effects(NamedTuple):
+    # Effect is active is it is greater or equal to zero
+    shield: int = -1
+    poison: int = -1
+    recharge: int = -1
+
+    def tick(self) -> "Effects":
+        return Effects(*(n - 1 for n in self))
+
+    def shield_active(self) -> bool:
+        return self.shield >= 0
+
+    def poison_active(self) -> bool:
+        return self.poison >= 0
+
+    def recharge_active(self) -> bool:
+        return self.recharge >= 0
+
+    def with_shield(self) -> "Effects":
+        assert self.shield <= 0  # Sanity check
+        return self._replace(shield=6)
+
+    def with_poison(self) -> "Effects":
+        assert self.poison <= 0  # Sanity check
+        return self._replace(poison=6)
+
+    def with_recharge(self) -> "Effects":
+        assert self.recharge <= 0  # Sanity check
+        return self._replace(recharge=5)
+
+
+class Player(NamedTuple):
+    hp: int
+    mana: int
+    effects: Effects
+
+
+MISSILE = 53
+DRAIN = 73
+SHIELD = 113
+POISON = 173
+RECHARGE = 229
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> Ennemy:
+        return Ennemy(*map(int, (line.split(": ")[1] for line in input.splitlines())))
+
+    def step(player: Player, ennemy: Ennemy) -> Iterator[tuple[int, Player, Ennemy]]:
+        def tick_spells(player: Player, ennemy: Ennemy) -> tuple[Player, Ennemy]:
+            player = player._replace(effects=player.effects.tick())
+            if player.effects.recharge_active():
+                player = player._replace(mana=player.mana + 101)
+            if player.effects.poison_active():
+                ennemy = ennemy._replace(hp=ennemy.hp - 3)
+            return player, ennemy
+
+        # Note: does *not* drain the mana for the spell
+        def possible_spells(
+            player: Player,
+            ennemy: Ennemy,
+        ) -> Iterator[tuple[int, Player, Ennemy]]:
+            if player.mana >= MISSILE:
+                yield (
+                    MISSILE,
+                    player,
+                    ennemy._replace(hp=ennemy.hp - 4),
+                )
+            if player.mana >= DRAIN:
+                yield (
+                    DRAIN,
+                    player._replace(hp=player.hp + 2),
+                    ennemy._replace(hp=ennemy.hp - 2),
+                )
+            if player.mana >= SHIELD and player.effects.shield <= 0:
+                yield (
+                    SHIELD,
+                    player._replace(effects=player.effects.with_shield()),
+                    ennemy,
+                )
+            if player.mana >= POISON and player.effects.poison <= 0:
+                yield (
+                    POISON,
+                    player._replace(effects=player.effects.with_poison()),
+                    ennemy,
+                )
+            if player.mana >= RECHARGE and player.effects.recharge <= 0:
+                yield (
+                    RECHARGE,
+                    player._replace(effects=player.effects.with_recharge()),
+                    ennemy,
+                )
+
+        def boss_turn(player: Player, ennemy: Ennemy) -> tuple[Player, Ennemy]:
+            # Spells are ticked at start of turn
+            player, ennemy = tick_spells(player, ennemy)
+
+            # Ennemy can't attack if they're dead
+            if ennemy.hp <= 0:
+                return player, ennemy
+
+            armor = 7 if player.effects.shield_active() else 0
+            damage = max(1, ennemy.damage - armor)
+            return player._replace(hp=player.hp - damage), ennemy
+
+        # Apply hard mode HP loss
+        player = player._replace(hp=player.hp - 1)
+        # We lose if we run out of hp
+        if player.hp <= 0:
+            return
+
+        # Spells are ticked at start of turn
+        player, ennemy = tick_spells(player, ennemy)
+
+        # Don't spend a spell if the ennemy is already dead
+        if ennemy.hp <= 0:
+            yield 0, player, ennemy
+
+        for cost, player, ennemy in possible_spells(player, ennemy):
+            yield cost, *boss_turn(player._replace(mana=player.mana - cost), ennemy)
+
+    def dijkstra(player: Player, ennemy: Ennemy) -> int:
+        # Priority queue of (mana_spent, player, ennemy)
+        queue = [(0, player, ennemy)]
+        seen: set[tuple[Player, Ennemy]] = set()
+
+        while len(queue) > 0:
+            total_cost, p, e = heapq.heappop(queue)
+            if p.hp <= 0:
+                continue
+            if e.hp <= 0:
+                return total_cost
+            # We must have seen (p, e) with a smaller distance before
+            if (p, e) in seen:
+                continue
+            # First time encountering (p, e), must be the smallest distance to it
+            seen.add((p, e))
+            # Add all neighbours to be visited
+            for cost, p, e in step(p, e):
+                heapq.heappush(queue, (total_cost + cost, p, e))
+
+        assert False  # Sanity check
+
+    ennemy = parse(input)
+    player = Player(50, 500, Effects())
+    return dijkstra(player, ennemy)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From a5fbfbbedf69347fd79ebfc565aa13e2ed262021 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:07:43 +0100
Subject: [PATCH 089/100] 2015: d23: ex1: add input

---
 2015/d23/ex1/input | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 2015/d23/ex1/input

diff --git a/2015/d23/ex1/input b/2015/d23/ex1/input
new file mode 100644
index 0000000..79d9624
--- /dev/null
+++ b/2015/d23/ex1/input
@@ -0,0 +1,46 @@
+jio a, +16
+inc a
+inc a
+tpl a
+tpl a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+tpl a
+tpl a
+inc a
+jmp +23
+tpl a
+inc a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+tpl a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+tpl a
+tpl a
+inc a
+jio a, +8
+inc b
+jie a, +4
+tpl a
+inc a
+jmp +2
+hlf a
+jmp -7

From 5da03de585297673af7d17c05d2fab3263f2b64e Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:07:51 +0100
Subject: [PATCH 090/100] 2015: d23: ex1: add solution

---
 2015/d23/ex1/ex1.py | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100755 2015/d23/ex1/ex1.py

diff --git a/2015/d23/ex1/ex1.py b/2015/d23/ex1/ex1.py
new file mode 100755
index 0000000..b498706
--- /dev/null
+++ b/2015/d23/ex1/ex1.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+import enum
+import sys
+from typing import NamedTuple
+
+
+class Op(enum.StrEnum):
+    HLF = "hlf"
+    TPL = "tpl"
+    INC = "inc"
+    JMP = "jmp"
+    JIE = "jie"
+    JIO = "jio"
+
+
+class Instruction(NamedTuple):
+    op: Op
+    x: str
+    y: str | None = None
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        op, rest = input.split(None, 1)
+        return cls(Op(op), *rest.split(", "))
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Instruction]:
+        return [Instruction.from_str(line) for line in input.splitlines()]
+
+    instructions = parse(input)
+    registers: dict[str, int] = {"a": 0, "b": 0}
+
+    ip = 0
+    while True:
+        if ip < 0 or ip >= len(instructions):
+            break
+        instr = instructions[ip]
+        ip += 1
+        match instr.op:
+            case Op.HLF:
+                registers[instr.x] //= 2
+            case Op.TPL:
+                registers[instr.x] *= 3
+            case Op.INC:
+                registers[instr.x] += 1
+            case Op.JMP:
+                ip += int(instr.x) - 1  # Account auto-increment
+            case Op.JIE:
+                assert instr.y is not None
+                if registers[instr.x] % 2 == 0:
+                    ip += int(instr.y) - 1  # Account auto-increment
+            case Op.JIO:
+                assert instr.y is not None
+                if registers[instr.x] == 1:
+                    ip += int(instr.y) - 1  # Account auto-increment
+    return registers["b"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 8abe651cf08d18c58e74e4b602fba2a6ca8933c9 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:07:56 +0100
Subject: [PATCH 091/100] 2015: d23: ex2: add input

---
 2015/d23/ex2/input | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 2015/d23/ex2/input

diff --git a/2015/d23/ex2/input b/2015/d23/ex2/input
new file mode 100644
index 0000000..79d9624
--- /dev/null
+++ b/2015/d23/ex2/input
@@ -0,0 +1,46 @@
+jio a, +16
+inc a
+inc a
+tpl a
+tpl a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+tpl a
+tpl a
+inc a
+jmp +23
+tpl a
+inc a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+tpl a
+inc a
+tpl a
+inc a
+inc a
+tpl a
+inc a
+tpl a
+tpl a
+inc a
+jio a, +8
+inc b
+jie a, +4
+tpl a
+inc a
+jmp +2
+hlf a
+jmp -7

From 3f1533b6e09a2c4bf3a657736e4c12ac357b5c4d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:08:05 +0100
Subject: [PATCH 092/100] 2015: d23: ex2: add solution

---
 2015/d23/ex2/ex2.py | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100755 2015/d23/ex2/ex2.py

diff --git a/2015/d23/ex2/ex2.py b/2015/d23/ex2/ex2.py
new file mode 100755
index 0000000..42bc07a
--- /dev/null
+++ b/2015/d23/ex2/ex2.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+import enum
+import sys
+from typing import NamedTuple
+
+
+class Op(enum.StrEnum):
+    HLF = "hlf"
+    TPL = "tpl"
+    INC = "inc"
+    JMP = "jmp"
+    JIE = "jie"
+    JIO = "jio"
+
+
+class Instruction(NamedTuple):
+    op: Op
+    x: str
+    y: str | None = None
+
+    @classmethod
+    def from_str(cls, input: str) -> "Instruction":
+        op, rest = input.split(None, 1)
+        return cls(Op(op), *rest.split(", "))
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[Instruction]:
+        return [Instruction.from_str(line) for line in input.splitlines()]
+
+    instructions = parse(input)
+    registers: dict[str, int] = {"a": 1, "b": 0}
+
+    ip = 0
+    while True:
+        if ip < 0 or ip >= len(instructions):
+            break
+        instr = instructions[ip]
+        ip += 1
+        match instr.op:
+            case Op.HLF:
+                registers[instr.x] //= 2
+            case Op.TPL:
+                registers[instr.x] *= 3
+            case Op.INC:
+                registers[instr.x] += 1
+            case Op.JMP:
+                ip += int(instr.x) - 1  # Account auto-increment
+            case Op.JIE:
+                assert instr.y is not None
+                if registers[instr.x] % 2 == 0:
+                    ip += int(instr.y) - 1  # Account auto-increment
+            case Op.JIO:
+                assert instr.y is not None
+                if registers[instr.x] == 1:
+                    ip += int(instr.y) - 1  # Account auto-increment
+    return registers["b"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From e8c323465f508a6e89f52c54a47644623cb0b165 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:59:14 +0100
Subject: [PATCH 093/100] 2015: d24: ex1: add input

---
 2015/d24/ex1/input | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 2015/d24/ex1/input

diff --git a/2015/d24/ex1/input b/2015/d24/ex1/input
new file mode 100644
index 0000000..bcdfa26
--- /dev/null
+++ b/2015/d24/ex1/input
@@ -0,0 +1,29 @@
+1
+2
+3
+7
+11
+13
+17
+19
+23
+31
+37
+41
+43
+47
+53
+59
+61
+67
+71
+73
+79
+83
+89
+97
+101
+103
+107
+109
+113

From a001f39ff0bb4c671240ecc1e9d835ec7059fbc2 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:59:20 +0100
Subject: [PATCH 094/100] 2015: d24: ex1: add solution

---
 2015/d24/ex1/ex1.py | 46 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100755 2015/d24/ex1/ex1.py

diff --git a/2015/d24/ex1/ex1.py b/2015/d24/ex1/ex1.py
new file mode 100755
index 0000000..025bb30
--- /dev/null
+++ b/2015/d24/ex1/ex1.py
@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import itertools
+import math
+import sys
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[int]:
+        return [int(n) for n in input.splitlines()]
+
+    def package_groups(packages: list[int]) -> tuple[list[int], list[int], list[int]]:
+        assert sum(packages) % 3 == 0  # Sanity check
+        target_weight = sum(packages) // 3
+
+        # I'm lazy, a brute-force double loop is good enough
+        for first_len in range(1, len(packages) + 1):
+            for perm in itertools.combinations(range(len(packages)), first_len):
+                first = [packages[p] for p in perm]
+                if sum(first) != target_weight:
+                    continue
+                others = [p for i, p in enumerate(packages) if i not in perm]
+                for sec_len in range(1, len(others) + 1):
+                    for perm in itertools.combinations(range(len(others)), sec_len):
+                        second = [others[p] for p in perm]
+                        if sum(second) != target_weight:
+                            continue
+                        last = [p for i, p in enumerate(others) if i not in perm]
+                        return first, second, last
+        assert False  # Sanity check
+
+    def quantum_entanglement(packages: list[int]) -> int:
+        return math.prod(packages)
+
+    packages = parse(input)
+    best_split = package_groups(packages)
+    return quantum_entanglement(best_split[0])
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 57b3f7bbf6b8ac2f24f1d9424841cc1dfdc66716 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:59:26 +0100
Subject: [PATCH 095/100] 2015: d24: ex2: add input

---
 2015/d24/ex2/input | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 2015/d24/ex2/input

diff --git a/2015/d24/ex2/input b/2015/d24/ex2/input
new file mode 100644
index 0000000..bcdfa26
--- /dev/null
+++ b/2015/d24/ex2/input
@@ -0,0 +1,29 @@
+1
+2
+3
+7
+11
+13
+17
+19
+23
+31
+37
+41
+43
+47
+53
+59
+61
+67
+71
+73
+79
+83
+89
+97
+101
+103
+107
+109
+113

From 587896b43f0af8b33f5bdc42195bb95b79c79bf0 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 03:59:31 +0100
Subject: [PATCH 096/100] 2015: d24: ex2: add solution

---
 2015/d24/ex2/ex2.py | 71 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 2015/d24/ex2/ex2.py

diff --git a/2015/d24/ex2/ex2.py b/2015/d24/ex2/ex2.py
new file mode 100755
index 0000000..8136a7b
--- /dev/null
+++ b/2015/d24/ex2/ex2.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python
+
+import itertools
+import math
+import sys
+from collections.abc import Iterator
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> list[int]:
+        return [int(n) for n in input.splitlines()]
+
+    def package_groups(
+        packages: list[int],
+    ) -> Iterator[tuple[list[int], list[int], list[int], list[int]]]:
+        assert sum(packages) % 4 == 0  # Sanity check
+        target_weight = sum(packages) // 4
+
+        # I'm lazy, a brute-force triple loop is good enough
+        found = False
+        for first_len in range(1, len(packages) + 1):
+            for perm in itertools.combinations(range(len(packages)), first_len):
+                first = [packages[p] for p in perm]
+                if sum(first) != target_weight:
+                    continue
+                others = [p for i, p in enumerate(packages) if i not in perm]
+                for sec_len in range(1, len(others) + 1):
+                    for perm in itertools.combinations(range(len(others)), sec_len):
+                        second = [others[p] for p in perm]
+                        if sum(second) != target_weight:
+                            continue
+                        others_ = [p for i, p in enumerate(others) if i not in perm]
+                        for third_len in range(1, len(others_) + 1):
+                            for perm in itertools.combinations(
+                                range(len(others_)), third_len
+                            ):
+                                third = [others_[p] for p in perm]
+                                last = [
+                                    others_[i]
+                                    for i in range(len(others_))
+                                    if i not in perm
+                                ]
+                                yield first, second, third, last
+                                # We only care to enumerate all valid *first* packages
+                                # Not *all* permutations
+                                found = True
+                                break
+                            if found:
+                                break
+                        if found:
+                            break
+                    if found:
+                        break
+                    # *Don't* break if `found`, we want to keep enumerating this length
+            if found:
+                break
+
+    def quantum_entanglement(packages: list[int]) -> int:
+        return math.prod(packages)
+
+    packages = parse(input)
+    return min(quantum_entanglement(split[0]) for split in package_groups(packages))
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From 65f558bf0e3c45996e33eb7ed0d881fb902bb28f Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 04:23:54 +0100
Subject: [PATCH 097/100] 2015: d25: ex1: add input

---
 2015/d25/ex1/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d25/ex1/input

diff --git a/2015/d25/ex1/input b/2015/d25/ex1/input
new file mode 100644
index 0000000..c5c38e6
--- /dev/null
+++ b/2015/d25/ex1/input
@@ -0,0 +1 @@
+To continue, please consult the code grid in the manual.  Enter the code at row 2947, column 3029.

From 6a8aa0685909c8f2fb2b0fcb650b400665235e4b Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 04:24:04 +0100
Subject: [PATCH 098/100] 2015: d25: ex1: add solution

---
 2015/d25/ex1/ex1.py | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100755 2015/d25/ex1/ex1.py

diff --git a/2015/d25/ex1/ex1.py b/2015/d25/ex1/ex1.py
new file mode 100755
index 0000000..1b6cc03
--- /dev/null
+++ b/2015/d25/ex1/ex1.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+import sys
+from typing import NamedTuple
+
+
+class Point(NamedTuple):
+    x: int
+    y: int
+
+
+def solve(input: str) -> int:
+    def parse(input: str) -> tuple[int, int]:
+        *_, row, column = input.replace(".", "").split(", ")
+        return int(row.split()[-1]), int(column.split()[-1])
+
+    def mod_pow(n: int, pow: int, mod: int) -> int:
+        if pow == 0:
+            return 1
+        if pow == 1:
+            return n % mod
+        res = mod_pow(n, pow // 2, mod) ** 2
+        if pow % 2 == 1:
+            res *= n
+        return res % mod
+
+    def lookup(row: int, column: int) -> int:
+        n = column + row - 1
+        top_right = n * (n + 1) // 2
+        i = top_right - row
+        return 20151125 * mod_pow(252533, i, 33554393) % 33554393
+
+    row, column = parse(input)
+    return lookup(row, column)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()

From fad5b0ba260748f62fd913376caecd53b3e9b0bf Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 04:24:09 +0100
Subject: [PATCH 099/100] 2015: d25: ex2: add input

---
 2015/d25/ex2/input | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 2015/d25/ex2/input

diff --git a/2015/d25/ex2/input b/2015/d25/ex2/input
new file mode 100644
index 0000000..c5c38e6
--- /dev/null
+++ b/2015/d25/ex2/input
@@ -0,0 +1 @@
+To continue, please consult the code grid in the manual.  Enter the code at row 2947, column 3029.

From efa485c08c0e99d4f0d8052d6c5e58f9943d1627 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Thu, 22 May 2025 04:24:15 +0100
Subject: [PATCH 100/100] 2015: d25: ex2: add solution

---
 2015/d25/ex2/ex2.py | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100755 2015/d25/ex2/ex2.py

diff --git a/2015/d25/ex2/ex2.py b/2015/d25/ex2/ex2.py
new file mode 100755
index 0000000..918e0ec
--- /dev/null
+++ b/2015/d25/ex2/ex2.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+
+
+def main() -> None:
+    print("There is no part two...")
+
+
+if __name__ == "__main__":
+    main()