24 lines
780 B
Python
24 lines
780 B
Python
from typing import Any, Iterator
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from ..base import BaseSolver
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class Solver(BaseSolver):
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def solve(self, input: str) -> Iterator[Any]:
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def is_safe(level: list[int]) -> bool:
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diff = [a - b for a, b in zip(level[:-1], level[1:], strict=True)]
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return sum(d > 0 for d in diff) in (0, len(diff)) and all(
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1 <= abs(d) <= 3 for d in diff
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)
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def is_any_safe(level: list[int]) -> bool:
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return any(
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is_safe(level[:i] + level[i + 1 :]) for i in range(0, len(level))
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)
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levels = [[int(c) for c in r.split()] for r in input.splitlines()]
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yield sum(is_safe(level) for level in levels)
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yield sum(is_safe(level) or is_any_safe(level) for level in levels)
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