#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

void solve() {
  ll n = 4;
  vector<ll> a(n);
  rep(i, n) cin >> a[i];
  vector<ll> p(n);
  rep(i, n) cin >> p[i];
  ll t;
  cin >> t;
  rep(i, n) t -= a[i] * p[i];
  cout << (t >= 0 ? "Yes" : "No") << '\n';
}

int main() {
  std::cin.tie(nullptr);
  std::ios_base::sync_with_stdio(false);
  int T = 1;
  for (int t = 0; t < T; t++) {
    solve();
  }
  return 0;
}