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4 changed files with 0 additions and 74 deletions

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#!/usr/bin/env python
import sys
def solve(input: str) -> int:
def parse(input: str) -> list[int]:
return [int(n) for n in input.split()]
def blink(stones: list[int]) -> list[int]:
res: list[int] = []
for n in stones:
if n == 0:
res.append(1)
elif len(str(n)) % 2 == 0:
s = str(n)
lhs, rhs = s[: len(s) // 2], s[len(s) // 2 :]
res.extend((int(lhs), int(rhs)))
else:
res.append(n * 2024)
return res
stones = parse(input)
for _ in range(25):
stones = blink(stones)
return len(stones)
def main() -> None:
input = sys.stdin.read()
print(solve(input))
if __name__ == "__main__":
main()

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0 7 6618216 26481 885 42 202642 8791

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#!/usr/bin/env python
import sys
from collections import Counter
def solve(input: str) -> int:
def parse(input: str) -> Counter[int]:
return Counter(int(n) for n in input.split())
def blink(stones: Counter[int]) -> Counter[int]:
res: Counter[int] = Counter()
for n, count in stones.items():
if n == 0:
res[1] += count
elif len(str(n)) % 2 == 0:
s = str(n)
lhs, rhs = s[: len(s) // 2], s[len(s) // 2 :]
res[int(lhs)] += count
res[int(rhs)] += count
else:
res[n * 2024] += count
return res
stones = parse(input)
for _ in range(75):
stones = blink(stones)
return sum(stones.values())
def main() -> None:
input = sys.stdin.read()
print(solve(input))
if __name__ == "__main__":
main()

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0 7 6618216 26481 885 42 202642 8791