N,D=map(int,input().split())
x=list(map(int,input().split()))
v=list(map(int,input().split()))
V=sum(v)
start=0
end=D

def cond(n):
    return V*n>=D

while end-start>1:
    test=(end+start)//2
    if cond(test):
        end=test
    else:
        start=test

print(end)