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

#define rep(i, n) for (ll i = 0; i < n; i++)
#define all(x) (x).begin(),(x).end()
const long long INF = 1LL << 60;
using ll = long long;
using ld = long double;
#define v2d(type,H,W,name,value) vector<vector<type>> name(H,vector<type>(W,value));

int main()
{
  ll N,A,B,X,Y;
  cin >> N >> A >> B >> X >> Y;

  vector<ll> H(N);
  rep(i,N){
    cin >> H[i];
  }

  rep(iter,A){
    sort(all(H));
    reverse(all(H));

    H[0]-=X;
  }

  rep(i,N){
    if(H[i]<0) H[i]=0;
  }

  ll sum=0;
  rep(i,N){
    sum+=H[i];
  }

  if(sum>B*Y) cout << "No" << endl;
  else cout << "Yes" << endl;
  
}