40 lines
1 KiB
Python
Executable file
40 lines
1 KiB
Python
Executable file
#!/usr/bin/env python
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import functools
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import itertools
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import sys
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from collections.abc import Iterator
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def solve(input: str) -> int:
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def parse(input: str) -> tuple[int, int]:
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a, b = input.splitlines()
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return int(a.split()[-1]), int(b.split()[-1])
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def generate(seed: int, factor: int) -> int:
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seed *= factor
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return seed % 2147483647
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def judge(a: int, b: int) -> bool:
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mask = (1 << 16) - 1
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return (a & mask) == (b & mask)
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def iter_judgements(seed_a: int, seed_b: int) -> Iterator[bool]:
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generate_a = functools.partial(generate, factor=16807)
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generate_b = functools.partial(generate, factor=48271)
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while True:
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seed_a, seed_b = generate_a(seed_a), generate_b(seed_b)
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yield judge(seed_a, seed_b)
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seed_a, seed_b = parse(input)
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return sum(itertools.islice(iter_judgements(seed_a, seed_b), 40000000))
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def main() -> None:
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input = sys.stdin.read()
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print(solve(input))
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if __name__ == "__main__":
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main()
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