#include <bits/stdc++.h>
using namespace std;
int main() {
  long long N, X, Y;
  cin >> N >> X >> Y;
  vector<int> R(N);
  for (int i = 0; i < N; i++) {
    cin >> R[i];
  }
  long double r = sqrt(X * X + Y * Y);
  long long ans = 0;
  for (int i = 0; i < N; i++) {
    ans += 2 * R[i];
  }
  if (ans >= r) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}