advent-of-code/src/holt59/aoc/2024/day2.py

import sys


def is_safe(level: list[int]) -> bool:
    diff = [a - b for a, b in zip(level[:-1], level[1:], strict=True)]

    return sum(d > 0 for d in diff) in (0, len(diff)) and all(
        1 <= abs(d) <= 3 for d in diff
    )


def is_any_safe(level: list[int]) -> bool:
    return any(is_safe(level[:i] + level[i + 1 :]) for i in range(0, len(level)))


levels = [[int(c) for c in r.split()] for r in sys.stdin.read().strip().splitlines()]

answer_1 = sum(is_safe(level) for level in levels)
answer_2 = sum(is_safe(level) or is_any_safe(level) for level in levels)

print(f"answer 1 is {answer_1}")
print(f"answer 2 is {answer_2}")