n, d = map(int, input().split())
x = list(map(int, input().split()))
v = list(map(int, input().split()))
num = sum(v)
left = 0
right = 10**18
while left < right:
    mid = (left + right) // 2
    if num * mid >= d:
        right = mid
    else:
        left = mid + 1
print(right)