#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;
    }
}