#include <iostream>
#include <cstdint>

using namespace std;

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

	uint32_t A, B, C, D, P, Q, R, S, T;
	cin >> A >> B >> C >> D >> P >> Q >> R >> S >> T;

	if (A * P + B * Q + C * R + D * S <= T)
		cout << "Yes\n";
	else
		cout << "No\n";

	return 0;
}