#include <vector>
#include <iostream>
#include <string>
#include <ostream>
#include <map>
#include <set>
#include <bitset>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <list>
#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;

int main()
{
    int 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" << endl;
    }
    else
        cout << "No"  << endl;
}