import sys

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def main():
    N, D = [int(x) for x in input().split()]
    X = [int(x) for x in input().split()]
    V = [int(x) for x in input().split()]

    vv = sum(V)

    print(-(-D // vv))




if __name__ == '__main__':
    main()