advent-of-code/2022/d04/ex2/ex2.py

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2022-12-04 06:31:58 +01:00
#!/usr/bin/env python
import sys
def solve(input: list[str]) -> int:
def is_overlapping(line: str) -> bool:
def assignment_to_set(elf: str) -> set[int]:
start, end = elf.split("-")
return set(range(int(start), int(end) + 1))
elf1, elf2 = map(assignment_to_set, line.split(","))
return bool(elf1 & elf2)
return sum(map(is_overlapping, input))
def main() -> None:
input = sys.stdin.read().splitlines()
print(solve(input))
if __name__ == "__main__":
main()