#include <bits/stdc++.h>
using namespace std;
int main() {
  double A;
  double B;
  double C;
  cin >> A >> B >> C;
  double a = sqrt(A);
  double b = sqrt(B);
  double c = sqrt(C);
  if (a + b < c) {
    cout << "Yes" << endl;
  } else {
    cout << "NO" << endl;
  }
}
