#ifdef NACHIA
#define _GLIBCXX_DEBUG
#else
#define NDEBUG
#endif
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(i64 i=0; i<i64(n); i++)
const i64 INF = 1001001001001001001;
template<typename A> void chmin(A& l, const A& r){ if(r < l) l = r; }
template<typename A> void chmax(A& l, const A& r){ if(l < r) l = r; }
using namespace std;


void testcase(){
    i64 a,b,c,d; cin >> a >> b >> c >> d;
    i64 p,q,r,s,t; cin >> p >> q >> r >> s >> t;
    i64 f = a * p + b * q + c * r + d * s;
    cout << (t >= f ? "Yes\n" : "No\n");
}

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    rep(f,1) testcase();
    return 0;
}