#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N,D;
    cin >> N >> D;
    vec<int> X(N),V(N);
    for(auto& x:X) cin >> x;
    for(auto& v:V) cin >> v;
    ll sum = accumulate(V.begin(),V.end(),0LL);
    cout << (D+sum-1)/sum << "\n";
}