N,D=map(int,input().split())
assert(1<=N<=100000)
assert(1<=D<=1000000000)
x=list(map(int,input().split()))
for val in x:
    assert(1<=val<=1000000000)
v=list(map(int,input().split()))
for val in v:
    assert(1<=val<=1000000000)
S=sum(v)
print((D+S-1)//S)