diff --git a/.isort.cfg b/.isort.cfg
deleted file mode 100644
index b9fb3f3..0000000
--- a/.isort.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[settings]
-profile=black
diff --git a/2019/d03/ex2/ex2.py b/2019/d03/ex2/ex2.py
index a0abfac..077f2e3 100755
--- a/2019/d03/ex2/ex2.py
+++ b/2019/d03/ex2/ex2.py
@@ -2,7 +2,7 @@
 
 import sys
 from fractions import Fraction
-from typing import Dict, List, NamedTuple, Optional
+from typing import List, NamedTuple, Optional
 
 
 class Point(NamedTuple):
diff --git a/2019/d04/ex1/ex1.py b/2019/d04/ex1/ex1.py
index 460b7d8..49bb589 100755
--- a/2019/d04/ex1/ex1.py
+++ b/2019/d04/ex1/ex1.py
@@ -7,7 +7,7 @@ def is_valid_password(p: int) -> bool:
     digits = str(p)
 
     def has_adjacent_digit():
-        for (a, b) in zip(digits, digits[1:]):
+        for a, b in zip(digits, digits[1:]):
             if a == b:
                 return True
         return False
diff --git a/2019/d04/ex2/ex2.py b/2019/d04/ex2/ex2.py
index 883abf9..a54ccfe 100755
--- a/2019/d04/ex2/ex2.py
+++ b/2019/d04/ex2/ex2.py
@@ -8,7 +8,7 @@ def is_valid_password(p: int) -> bool:
 
     def has_unique_adjacent_digit():
         counts = {d: 0 for d in range(10)}
-        for (a, b) in zip(digits, digits[1:]):
+        for a, b in zip(digits, digits[1:]):
             if a == b:
                 counts[int(a)] += 1
         return any(count == 1 for count in counts.values())
diff --git a/2019/d05/ex1/ex1.py b/2019/d05/ex1/ex1.py
index 09dac02..fe46167 100755
--- a/2019/d05/ex1/ex1.py
+++ b/2019/d05/ex1/ex1.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-import sys
-from copy import deepcopy
 from enum import IntEnum
 from typing import List, NamedTuple
 
diff --git a/2019/d07/ex2/ex2.py b/2019/d07/ex2/ex2.py
index c239eaa..8f5e209 100755
--- a/2019/d07/ex2/ex2.py
+++ b/2019/d07/ex2/ex2.py
@@ -5,7 +5,7 @@ import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d09/ex1/ex1.py b/2019/d09/ex1/ex1.py
index 6f54dec..9a2df1e 100755
--- a/2019/d09/ex1/ex1.py
+++ b/2019/d09/ex1/ex1.py
@@ -1,11 +1,10 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d09/ex2/ex2.py b/2019/d09/ex2/ex2.py
index 598f628..7c8be67 100755
--- a/2019/d09/ex2/ex2.py
+++ b/2019/d09/ex2/ex2.py
@@ -1,11 +1,10 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d10/ex2/ex2.py b/2019/d10/ex2/ex2.py
index 60f115a..480234e 100755
--- a/2019/d10/ex2/ex2.py
+++ b/2019/d10/ex2/ex2.py
@@ -4,7 +4,6 @@ import sys
 from cmath import phase
 from itertools import groupby
 from math import gcd, pi
-from pprint import pprint
 from typing import NamedTuple, Set, Tuple
 
 
diff --git a/2019/d13/ex1/ex1.py b/2019/d13/ex1/ex1.py
index 1bf7e8c..924ffb7 100755
--- a/2019/d13/ex1/ex1.py
+++ b/2019/d13/ex1/ex1.py
@@ -3,7 +3,7 @@
 import sys
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Dict, Iterable, List, NamedTuple, Tuple, TypeVar
+from typing import Iterable, List, NamedTuple, Tuple, TypeVar
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d13/ex2/ex2.py b/2019/d13/ex2/ex2.py
index 9fb669f..af0d24f 100755
--- a/2019/d13/ex2/ex2.py
+++ b/2019/d13/ex2/ex2.py
@@ -3,7 +3,7 @@
 import sys
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Dict, Iterable, List, NamedTuple, Tuple, TypeVar
+from typing import Iterable, List, NamedTuple, Tuple, TypeVar
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d16/ex2/ex2.py b/2019/d16/ex2/ex2.py
index a13a0bf..317d157 100755
--- a/2019/d16/ex2/ex2.py
+++ b/2019/d16/ex2/ex2.py
@@ -2,8 +2,6 @@
 
 import sys
 from functools import reduce
-from itertools import chain, cycle
-from typing import Iterable, List
 
 
 def main() -> None:
diff --git a/2019/d19/ex2/ex2.py b/2019/d19/ex2/ex2.py
index 138e45b..8dd132c 100755
--- a/2019/d19/ex2/ex2.py
+++ b/2019/d19/ex2/ex2.py
@@ -4,7 +4,7 @@ import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Iterator, List, NamedTuple, Tuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2020/d07/ex2/ex2.py b/2020/d07/ex2/ex2.py
index 107d737..a955087 100755
--- a/2020/d07/ex2/ex2.py
+++ b/2020/d07/ex2/ex2.py
@@ -2,8 +2,6 @@
 
 import re
 import sys
-from collections import defaultdict
-from copy import deepcopy
 from dataclasses import dataclass
 from typing import Dict, List, Set, Tuple
 
diff --git a/2020/d17/ex1/ex1.py b/2020/d17/ex1/ex1.py
index dd9efee..03bf46b 100755
--- a/2020/d17/ex1/ex1.py
+++ b/2020/d17/ex1/ex1.py
@@ -41,7 +41,6 @@ def update(grid: Grid) -> Grid:
 
 
 def solve(grid: Grid) -> int:
-
     for __ in range(6):
         grid = update(grid)
 
diff --git a/2020/d17/ex2/ex2.py b/2020/d17/ex2/ex2.py
index 8589288..ba979a1 100755
--- a/2020/d17/ex2/ex2.py
+++ b/2020/d17/ex2/ex2.py
@@ -41,7 +41,6 @@ def update(grid: Grid) -> Grid:
 
 
 def solve(grid: Grid) -> int:
-
     for __ in range(6):
         grid = update(grid)
 
diff --git a/2020/d18/ex2/ex2.py b/2020/d18/ex2/ex2.py
index 94f13ed..a83161c 100755
--- a/2020/d18/ex2/ex2.py
+++ b/2020/d18/ex2/ex2.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 import sys
-from typing import Callable, Dict, List
+from typing import List
 
 """
 E : T [ * T ]*
diff --git a/2020/d20/ex2/ex2.py b/2020/d20/ex2/ex2.py
index e923806..c9e06a7 100755
--- a/2020/d20/ex2/ex2.py
+++ b/2020/d20/ex2/ex2.py
@@ -5,7 +5,6 @@ import itertools
 import math
 import sys
 from collections import defaultdict
-from copy import deepcopy
 from typing import Dict, Iterator, List, Set, Tuple
 
 Tile = List[List[str]]
diff --git a/2020/d23/ex1/ex1.py b/2020/d23/ex1/ex1.py
index faae133..2d7ff20 100755
--- a/2020/d23/ex1/ex1.py
+++ b/2020/d23/ex1/ex1.py
@@ -2,7 +2,7 @@
 
 import itertools
 import sys
-from typing import List, Tuple
+from typing import List
 
 
 def solve(circle: List[int]) -> int:
diff --git a/2020/d23/ex2/ex2.py b/2020/d23/ex2/ex2.py
index 90c8c81..8993dcb 100755
--- a/2020/d23/ex2/ex2.py
+++ b/2020/d23/ex2/ex2.py
@@ -2,7 +2,7 @@
 
 import itertools
 import sys
-from typing import List, Tuple
+from typing import List
 
 
 def solve(circle: List[int]) -> int:
diff --git a/2020/d24/ex2/ex2.py b/2020/d24/ex2/ex2.py
index 17728b2..ef749f9 100755
--- a/2020/d24/ex2/ex2.py
+++ b/2020/d24/ex2/ex2.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import defaultdict
-from copy import deepcopy
 from typing import Dict, Iterator, List, Tuple
 
 Offset = Tuple[int, int]
diff --git a/2021/d01/ex1/ex1.py b/2021/d01/ex1/ex1.py
index 24cc5d1..3853ce4 100755
--- a/2021/d01/ex1/ex1.py
+++ b/2021/d01/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d02/ex1/ex1.py b/2021/d02/ex1/ex1.py
index f28dd77..f891b43 100755
--- a/2021/d02/ex1/ex1.py
+++ b/2021/d02/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d02/ex2/ex2.py b/2021/d02/ex2/ex2.py
index b48215c..8843639 100755
--- a/2021/d02/ex2/ex2.py
+++ b/2021/d02/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d03/ex1/ex1.py b/2021/d03/ex1/ex1.py
index ed2eeb7..7519004 100755
--- a/2021/d03/ex1/ex1.py
+++ b/2021/d03/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d03/ex2/ex2.py b/2021/d03/ex2/ex2.py
index 9c6515b..acf0ff2 100755
--- a/2021/d03/ex2/ex2.py
+++ b/2021/d03/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from typing import List
diff --git a/2021/d06/ex1/ex1.py b/2021/d06/ex1/ex1.py
index 5eec9ce..65abb44 100755
--- a/2021/d06/ex1/ex1.py
+++ b/2021/d06/ex1/ex1.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import Counter
-from dataclasses import dataclass
 from typing import Iterator, List, TypeVar
 
 T = TypeVar("T")
diff --git a/2021/d06/ex2/ex2.py b/2021/d06/ex2/ex2.py
index 2e64423..bb40805 100755
--- a/2021/d06/ex2/ex2.py
+++ b/2021/d06/ex2/ex2.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import Counter
-from dataclasses import dataclass
 from typing import Iterator, List, TypeVar
 
 T = TypeVar("T")
diff --git a/2021/d07/ex1/ex1.py b/2021/d07/ex1/ex1.py
index 4205009..2b8a8a9 100755
--- a/2021/d07/ex1/ex1.py
+++ b/2021/d07/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d07/ex2/ex2.py b/2021/d07/ex2/ex2.py
index 56b818c..8eec5ef 100755
--- a/2021/d07/ex2/ex2.py
+++ b/2021/d07/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from math import ceil, floor
 from typing import List
diff --git a/2021/d08/ex2/ex2.py b/2021/d08/ex2/ex2.py
index 1553e29..c22b23b 100755
--- a/2021/d08/ex2/ex2.py
+++ b/2021/d08/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from dataclasses import dataclass
 from typing import Dict, List, Set
diff --git a/2021/d09/ex1/ex1.py b/2021/d09/ex1/ex1.py
index cf7d7d6..e84e893 100755
--- a/2021/d09/ex1/ex1.py
+++ b/2021/d09/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Tuple
 
diff --git a/2021/d09/ex2/ex2.py b/2021/d09/ex2/ex2.py
index 451883a..0311995 100755
--- a/2021/d09/ex2/ex2.py
+++ b/2021/d09/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Tuple
 
diff --git a/2021/d10/ex1/ex1.py b/2021/d10/ex1/ex1.py
index 4667d43..6770222 100755
--- a/2021/d10/ex1/ex1.py
+++ b/2021/d10/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List, Optional, cast
 
diff --git a/2021/d10/ex2/ex2.py b/2021/d10/ex2/ex2.py
index 27de8ac..d100b0f 100755
--- a/2021/d10/ex2/ex2.py
+++ b/2021/d10/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Optional
 
diff --git a/2021/d11/ex1/ex1.py b/2021/d11/ex1/ex1.py
index 19669b3..c6bf0be 100755
--- a/2021/d11/ex1/ex1.py
+++ b/2021/d11/ex1/ex1.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from copy import deepcopy
 from typing import Iterator, List, Set, Tuple
 
 Grid = List[List[int]]
@@ -39,7 +38,7 @@ def solve(input: List[str]) -> int:
         # Second step, do flashes
         has_flashed: Set[Point] = set()
         while len(flashes := (excited(levels) - has_flashed)) > 0:
-            for (i, j) in flashes:
+            for i, j in flashes:
                 has_flashed.add((i, j))
                 for x, y in neighbours_of((i, j)):
                     levels[x][y] += 1
diff --git a/2021/d11/ex2/ex2.py b/2021/d11/ex2/ex2.py
index 0dee9eb..8f95f55 100755
--- a/2021/d11/ex2/ex2.py
+++ b/2021/d11/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from copy import deepcopy
 from typing import Iterator, List, Set, Tuple
 
 Grid = List[List[int]]
@@ -39,7 +38,7 @@ def solve(input: List[str]) -> int:
         # Second step, do flashes
         has_flashed: Set[Point] = set()
         while len(flashes := (excited(levels) - has_flashed)) > 0:
-            for (i, j) in flashes:
+            for i, j in flashes:
                 has_flashed.add((i, j))
                 for x, y in neighbours_of((i, j)):
                     levels[x][y] += 1
diff --git a/2021/d12/ex1/ex1.py b/2021/d12/ex1/ex1.py
index 4d0cacf..6108876 100755
--- a/2021/d12/ex1/ex1.py
+++ b/2021/d12/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from collections import defaultdict
 from typing import Dict, List, Set
@@ -12,7 +11,7 @@ def solve(input: List[str]) -> int:
     def parse() -> Map:
         res: Map = defaultdict(set)
 
-        for (start, to) in map(lambda s: s.split("-"), input):
+        for start, to in map(lambda s: s.split("-"), input):
             res[start].add(to)
             res[to].add(start)
 
diff --git a/2021/d12/ex2/ex2.py b/2021/d12/ex2/ex2.py
index 69d9aa9..b30d9b8 100755
--- a/2021/d12/ex2/ex2.py
+++ b/2021/d12/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from collections import defaultdict
 from typing import Dict, List, Set
@@ -12,7 +11,7 @@ def solve(input: List[str]) -> int:
     def parse() -> Map:
         res: Map = defaultdict(set)
 
-        for (start, to) in map(lambda s: s.split("-"), input):
+        for start, to in map(lambda s: s.split("-"), input):
             res[start].add(to)
             res[to].add(start)
 
diff --git a/2021/d15/ex1/ex1.py b/2021/d15/ex1/ex1.py
index d7c5e88..4399aba 100755
--- a/2021/d15/ex1/ex1.py
+++ b/2021/d15/ex1/ex1.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
 import heapq
-import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Set, Tuple
+from typing import Iterator, List, NamedTuple, Set
 
 
 class Point(NamedTuple):
diff --git a/2021/d15/ex2/ex2.py b/2021/d15/ex2/ex2.py
index 0fa89b8..c2bbd30 100755
--- a/2021/d15/ex2/ex2.py
+++ b/2021/d15/ex2/ex2.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
 import heapq
-import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Set, Tuple
+from typing import Iterator, List, NamedTuple, Set
 
 
 class Point(NamedTuple):
diff --git a/2021/d16/ex1/ex1.py b/2021/d16/ex1/ex1.py
index d65fec5..1978196 100755
--- a/2021/d16/ex1/ex1.py
+++ b/2021/d16/ex1/ex1.py
@@ -5,7 +5,7 @@ import functools
 import itertools
 import sys
 from dataclasses import dataclass
-from typing import Iterable, Iterator, List, Tuple, TypeVar
+from typing import Iterable, Iterator, List, Tuple
 
 RawPacket = List[bool]
 
diff --git a/2021/d16/ex2/ex2.py b/2021/d16/ex2/ex2.py
index 7ecb73a..bb9ad4e 100755
--- a/2021/d16/ex2/ex2.py
+++ b/2021/d16/ex2/ex2.py
@@ -6,7 +6,7 @@ import itertools
 import math
 import sys
 from dataclasses import dataclass
-from typing import Callable, Dict, Iterable, Iterator, List, Tuple, TypeVar
+from typing import Callable, Dict, Iterable, Iterator, List, Tuple
 
 RawPacket = List[bool]
 
diff --git a/2021/d17/ex1/ex1.py b/2021/d17/ex1/ex1.py
index d58a72e..00bbca2 100755
--- a/2021/d17/ex1/ex1.py
+++ b/2021/d17/ex1/ex1.py
@@ -1,7 +1,6 @@
 #!/usr/bin/env python
 
 import itertools
-import math
 import sys
 from typing import Iterator, List, NamedTuple
 
diff --git a/2021/d17/ex2/ex2.py b/2021/d17/ex2/ex2.py
index e2beb9a..bc7dab1 100755
--- a/2021/d17/ex2/ex2.py
+++ b/2021/d17/ex2/ex2.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
-import math
 import sys
 from typing import Iterator, List, NamedTuple
 
diff --git a/2021/d18/ex2/ex2.py b/2021/d18/ex2/ex2.py
index 56c8d48..c0a37a7 100755
--- a/2021/d18/ex2/ex2.py
+++ b/2021/d18/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from copy import deepcopy
diff --git a/2021/d19/ex1/ex1.py b/2021/d19/ex1/ex1.py
index 922e709..e42af3c 100755
--- a/2021/d19/ex1/ex1.py
+++ b/2021/d19/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from dataclasses import dataclass
diff --git a/2021/d19/ex2/ex2.py b/2021/d19/ex2/ex2.py
index 1ad850a..ff4f6ad 100755
--- a/2021/d19/ex2/ex2.py
+++ b/2021/d19/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from dataclasses import dataclass
diff --git a/2021/d22/ex1/ex1.py b/2021/d22/ex1/ex1.py
index 662dd49..dac1513 100755
--- a/2021/d22/ex1/ex1.py
+++ b/2021/d22/ex1/ex1.py
@@ -3,7 +3,7 @@
 import functools
 import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Set, Tuple, cast
+from typing import List, NamedTuple, Optional, Set, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d22/ex2/ex2.py b/2021/d22/ex2/ex2.py
index 4753b54..3c7d2c5 100755
--- a/2021/d22/ex2/ex2.py
+++ b/2021/d22/ex2/ex2.py
@@ -3,7 +3,7 @@
 import functools
 import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Set, Tuple, cast
+from typing import List, NamedTuple, Optional, Set, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d23/ex1/ex1.py b/2021/d23/ex1/ex1.py
index 4d585cd..0b99d71 100755
--- a/2021/d23/ex1/ex1.py
+++ b/2021/d23/ex1/ex1.py
@@ -3,7 +3,7 @@
 import enum
 import functools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Tuple, cast
+from typing import Iterator, List, NamedTuple, Optional, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d23/ex2/ex2.py b/2021/d23/ex2/ex2.py
index 1ea1d8f..8c077d9 100755
--- a/2021/d23/ex2/ex2.py
+++ b/2021/d23/ex2/ex2.py
@@ -3,7 +3,7 @@
 import enum
 import functools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Tuple, cast
+from typing import Iterator, List, NamedTuple, Optional, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d25/ex1/ex1.py b/2021/d25/ex1/ex1.py
index 76fbe54..5d6f612 100755
--- a/2021/d25/ex1/ex1.py
+++ b/2021/d25/ex1/ex1.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
-import enum
 import itertools
 import sys
-from typing import Iterable, Iterator, List, NamedTuple, Set
+from typing import List, NamedTuple, Set
 
 
 class Point(NamedTuple):
@@ -61,11 +60,13 @@ def solve(input: List[str]) -> int:
         for x in range(map.dimensions.x):
             print(
                 "".join(
-                    "v"
-                    if Point(x, y) in map.south
-                    else ">"
-                    if Point(x, y) in map.east
-                    else "."
+                    (
+                        "v"
+                        if Point(x, y) in map.south
+                        else ">"
+                        if Point(x, y) in map.east
+                        else "."
+                    )
                     for y in range(map.dimensions.y)
                 )
             )
diff --git a/2022/d07/ex1/ex1.py b/2022/d07/ex1/ex1.py
index 43e49f1..fcd28d4 100755
--- a/2022/d07/ex1/ex1.py
+++ b/2022/d07/ex1/ex1.py
@@ -8,7 +8,6 @@ FileSystem = dict[str, Union[int, "FileSystem"]]
 
 def solve(input: list[str]) -> int:
     def build_tree(input: list[str], i: int = 0) -> tuple[FileSystem, int]:
-
         fs: FileSystem = {}
 
         while i < len(input):
diff --git a/2022/d07/ex2/ex2.py b/2022/d07/ex2/ex2.py
index 9886cf0..6a6d447 100755
--- a/2022/d07/ex2/ex2.py
+++ b/2022/d07/ex2/ex2.py
@@ -8,7 +8,6 @@ FileSystem = dict[str, Union[int, "FileSystem"]]
 
 def solve(input: list[str]) -> int:
     def build_tree(input: list[str], i: int = 0) -> tuple[FileSystem, int]:
-
         fs: FileSystem = {}
 
         while i < len(input):
diff --git a/2022/d12/ex1/ex1.py b/2022/d12/ex1/ex1.py
index 9e1c372..3e78cfc 100755
--- a/2022/d12/ex1/ex1.py
+++ b/2022/d12/ex1/ex1.py
@@ -20,7 +20,7 @@ class HeightMap:
 
     def reachable_neighbours(self, p: Point) -> Iterator[Point]:
         reachable_height = self.heights[p.x][p.y] + 1
-        for (dx, dy) in ((-1, 0), (1, 0), (0, -1), (0, 1)):
+        for dx, dy in ((-1, 0), (1, 0), (0, -1), (0, 1)):
             x, y = p.x + dx, p.y + dy
             if x < 0 or x >= len(self.heights):
                 continue
diff --git a/2022/d12/ex2/ex2.py b/2022/d12/ex2/ex2.py
index 657f807..0a713b3 100755
--- a/2022/d12/ex2/ex2.py
+++ b/2022/d12/ex2/ex2.py
@@ -20,7 +20,7 @@ class HeightMap:
 
     def reachable_neighbours(self, p: Point) -> Iterator[Point]:
         reachable_height = self.heights[p.x][p.y] + 1
-        for (dx, dy) in ((-1, 0), (1, 0), (0, -1), (0, 1)):
+        for dx, dy in ((-1, 0), (1, 0), (0, -1), (0, 1)):
             x, y = p.x + dx, p.y + dy
             if x < 0 or x >= len(self.heights):
                 continue
diff --git a/2022/d18/ex2/ex2.py b/2022/d18/ex2/ex2.py
index 6f7bfcb..57f8b5a 100755
--- a/2022/d18/ex2/ex2.py
+++ b/2022/d18/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from collections import deque
 from collections.abc import Iterator
 from typing import NamedTuple
 
diff --git a/2022/d21/ex1/ex1.py b/2022/d21/ex1/ex1.py
index 7c12836..e9c4727 100755
--- a/2022/d21/ex1/ex1.py
+++ b/2022/d21/ex1/ex1.py
@@ -25,7 +25,7 @@ class Operator(str, enum.Enum):
 
 class Monkey:
     def get_value(self, monkeys: dict[str, "Monkey"]) -> int:
-        raise NotImplemented
+        raise NotImplementedError
 
 
 @dataclasses.dataclass
diff --git a/2022/d21/ex2/ex2.py b/2022/d21/ex2/ex2.py
index ec9ca8d..386a187 100755
--- a/2022/d21/ex2/ex2.py
+++ b/2022/d21/ex2/ex2.py
@@ -93,7 +93,7 @@ class MathObserver:
 
 class Monkey:
     def get_value(self, monkeys: dict[str, "Monkey"]) -> Num:
-        raise NotImplemented
+        raise NotImplementedError
 
 
 @dataclasses.dataclass
diff --git a/2023/d02/ex2/ex2.py b/2023/d02/ex2/ex2.py
index 309753e..32c3a34 100755
--- a/2023/d02/ex2/ex2.py
+++ b/2023/d02/ex2/ex2.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python
 
-import functools
 import math
-import operator as op
 import sys
 from collections import Counter
 from enum import StrEnum
diff --git a/2023/d14/ex2/ex2.py b/2023/d14/ex2/ex2.py
index 090724f..b7b0222 100755
--- a/2023/d14/ex2/ex2.py
+++ b/2023/d14/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import dataclasses
 import itertools
 import sys
 from enum import StrEnum
diff --git a/2023/d17/ex2/ex2.py b/2023/d17/ex2/ex2.py
index a643534..f4cfc6e 100755
--- a/2023/d17/ex2/ex2.py
+++ b/2023/d17/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import functools
 import heapq
-import itertools
 import sys
 from collections.abc import Iterator
 from enum import Enum
diff --git a/flake.lock b/flake.lock
index ffbe623..d2cf81b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
         "type": "github"
       },
       "original": {
@@ -21,11 +21,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1660459072,
-        "narHash": "sha256-8DFJjXG8zqoONA1vXtgeKXy68KdJL5UaXR8NtVMUbx8=",
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
         "owner": "hercules-ci",
         "repo": "gitignore.nix",
-        "rev": "a20de23b925fd8264fd7fad6454652e142fd7f73",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
         "type": "github"
       },
       "original": {
@@ -58,11 +58,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1701336116,
-        "narHash": "sha256-kEmpezCR/FpITc6yMbAh4WrOCiT2zg5pSjnKrq51h5Y=",
+        "lastModified": 1731890469,
+        "narHash": "sha256-D1FNZ70NmQEwNxpSSdTXCSklBH1z2isPR84J6DQrJGs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f5c27c6136db4d76c30e533c20517df6864c46ee",
+        "rev": "5083ec887760adfe12af64830a66807423a859a7",
         "type": "github"
       },
       "original": {
@@ -75,9 +75,6 @@
     "pre-commit-hooks": {
       "inputs": {
         "flake-compat": "flake-compat",
-        "flake-utils": [
-          "futils"
-        ],
         "gitignore": "gitignore",
         "nixpkgs": [
           "nixpkgs"
@@ -87,11 +84,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1700922917,
-        "narHash": "sha256-ej2fch/T584b5K9sk1UhmZF7W6wEfDHuoUYpFN8dtvM=",
+        "lastModified": 1732021966,
+        "narHash": "sha256-mnTbjpdqF0luOkou8ZFi2asa1N3AA2CchR/RqCNmsGE=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "e5ee5c5f3844550c01d2131096c7271cec5e9b78",
+        "rev": "3308484d1a443fc5bc92012435d79e80458fe43c",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 6334931..066f6db 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,7 +22,6 @@
       repo = "pre-commit-hooks.nix";
       ref = "master";
       inputs = {
-        flake-utils.follows = "futils";
         nixpkgs.follows = "nixpkgs";
         nixpkgs-stable.follows = "nixpkgs";
       };
@@ -40,17 +39,13 @@
             src = self;
 
             hooks = {
-              black = {
-                enable = true;
-              };
-
-              isort = {
-                enable = true;
-              };
-
               nixpkgs-fmt = {
                 enable = true;
               };
+
+              ruff-format = {
+                enable = true;
+              };
             };
           };
         };
@@ -58,12 +53,11 @@
         devShell = pkgs.mkShell {
           buildInputs = with pkgs; [
             (python3.withPackages (ps: with ps; [
-              black
-              isort
               mypy
               z3
             ]))
             pyright
+            ruff
           ];
 
           inherit (self.checks.${system}.pre-commit) shellHook;