#include <iostream>
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\n";
  }
  else
  {
    cout << "No\n";
  }
  return 0;
}
/*
  File : ~/yukicoder/530/A.cpp
  Date : 2025/03/21
  Time : 21:18:34
*/