mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N, D = map(int, input().split())
    X = list(map(int, input().split()))
    V = list(map(int, input().split()))

    v = sum(V)
    print((D-1) // v + 1)


if __name__ == '__main__':
    main()