#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using std::cin;
using std::cout;
using std::vector;
using ll = long long;

int main() {
	int n, a, b;
	ll x, y;
	cin >> n >> a >> b >> x >> y;
	
	vector<ll> h(n);
	rep(i, n) cin >> h[i];
	
	ll s = accumulate(h.begin(), h.end(), 0);
	if (a*x + b*y >= s) puts("Yes");
	else puts("No");
	
	return 0;
}