17med

def main() -> None:
    import sys
    from typing import Callable, Tuple
    from functools import reduce

    data: list[str] = sys.stdin.read().splitlines()
    get_line: Callable[[int], str | None] = lambda i: data[i] if i < len(data) else None
    parse_int: Callable[[str | None], int | None] = lambda s: int(s.strip()) if s else None
    safe_split: Callable[[str | None], Tuple[int, ...]] = lambda s: tuple(map(int, s.strip().split())) if s else ()
    sum_pow4: Callable[[int, int], int] = lambda acc, y: acc + y**4 if y <= 0 else acc