#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  ll a, b, c;
  cin >> a >> b >> c;
  const long double eps = 1.0E-14;
  if (sqrt(a) + sqrt(b) + eps < sqrt(c))
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
