#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    ll N, A, B, X, Y, S=0, h;
    cin >> N >> A >> B >> X >> Y;
    priority_queue<ll> que;
    for (int i=0; i<N; i++){
        cin >> h;
        que.push(h);
    }

    while(!que.empty() && A){
        h = que.top();
        que.pop();
        h -= X;
        A--;
        if (h > 0) que.push(h);
    }

    while(!que.empty()){
        h = que.top();
        S += h;
        que.pop();
    }

    cout << (S <= B*Y ? "Yes" : "No") << endl;

    return 0;
}