#include <bits/stdc++.h>
using namespace std;
int main(){
  int A, B, C, D;
  cin >> A >> B >> C >> D;
  int P, Q, R, S, T;
  cin >> P >> Q >> R >> S >> T;
  if (A * P + B * Q + C * R + D * S <= T){
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}