#include <bits/stdc++.h>
using namespace std;

int main()
{
	int N, A, B, X;
	long long Y;
	cin >> N >> A >> B >> X >> Y;
	priority_queue<int> q;
	for( int i = 0; i < N; i++ ) {
		int H;
		cin >> H;
		q.push( H );
	}

	for( int i = 0; i < A; i++ ) {
		int H = q.top();
		q.pop();
		H -= X;
		if( H > 0 ) q.push( H );
	}
	long long s = 0;
	while( q.size() ) {
		int H = q.top();
		q.pop();
		s += H;
	}
	string ans = "Yes";
	if( s > Y * B ) ans = "No";

	cout << ans << endl;
}