#include<bits/stdc++.h>
using namespace std;
#define rep(i,N) for(i=0;i<N;i++)
#define ll long long

int main(void){
    ll A[4];
    ll B[4];
    ll T;
    
    ll i,j,k;
    
    ll sum=0;
    rep(i,4)cin>>A[i];
    rep(i,4)cin>>B[i];
    cin>>T;

    rep(i,4)sum+=A[i]*B[i];

    if(sum<=T)cout<<"Yes"<<endl;
    else cout<<"No"<<endl;

    return 0;
}