#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ALL(v) v.begin(), v.end()
typedef long long ll;

#include <bits/stdc++.h>
using namespace std;

int main(){
  ll n,d;
  cin>>n>>d;
  
  vector<ll> X(n),V(n);
  rep(i,n) cin>>X[i];
  rep(i,n) cin>>V[i];
  
  ll sum=0;
  rep(i,n) sum+=V[i];
  
  int ans=(sum+d-1)/sum;
  cout<<ans<<endl;
  
  return 0;
}