#include <bits/stdc++.h>
using ::std::cin;
using ::std::cout;
using ::std::endl;
int main() {
  long a = 0;
  long b = 0;
  long c = 0;
  cin >> a >> b >> c;
  double ad = std::sqrt(a);
  double bd = std::sqrt(b);
  double cd = std::sqrt(c);
  if (ad + bd < cd) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
