#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int a, b, c, d, p, q, r, s, t;
	cin >> a >> b >> c >> d >> p >> q >> r >> s >> t;
	int sum = a * p + b * q + c * r + d * s;
	string ans = "Yes";
	if(sum > t) ans = "No";
	cout << ans << endl;
}