#!/usr/bin/env python3
from typing import *

def solve(n: int, d: int, x: List[int], v: List[int]) -> int:
    return (d + sum(v) - 1) // sum(v)


# generated by online-judge-template-generator v4.4.0 (https://github.com/kmyk/online-judge-template-generator)
def main():
    import sys
    tokens = iter(sys.stdin.read().split())
    N = int(next(tokens))
    D = int(next(tokens))
    x = [None for _ in range(N)]
    v = [None for _ in range(N)]
    for i in range(N):
        x[i] = int(next(tokens))
    for i in range(N):
        v[i] = int(next(tokens))
    assert next(tokens, None) is None
    a = solve(N, D, x, v)
    print(a)

if __name__ == '__main__':
    main()