#include <bits/stdc++.h>
using namespace std;
double a, b, c;
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> a >> b >> c;
  if (sqrt(a) + sqrt(b) < sqrt(c))
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
