#include<bits/stdc++.h>

using namespace std;
using ll = long long;


int main()
{
    ll n, d;
    cin >> n >> d;
    vector<ll> x(n), v(n);
    for(int i = 0; i < n; i++)cin >> x[i];
    for(int i = 0; i < n; i++)cin >> v[i];
    ll sum = accumulate(v.begin(), v.end(), 0LL);

    cout << (sum + d - 1) / sum << endl;

}