#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) {
        puts("Yes");
    } else {
        puts("No");
    }

    return 0;
}