#include <bits/stdc++.h>
//#include <atcoder/modint>

using namespace std;
//using namespace atcoder;
using ll = long long;
//using mint = modint998244353;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int a[4], b[4], c, s=0;
    for (int i=0; i<4; i++) cin >> a[i];
    for (int i=0; i<4; i++) cin >> b[i];
    cin >> c;
    for (int i=0; i<4; i++) s += a[i] * b[i];

    cout << (c >= s ? "Yes" : "No") << endl;

    return 0;
}