#include <bits/stdc++.h>
using namespace std;
int main() {
  float a, b, c;
  long double route_ab;
  cin >> a;
  cin >> b;
  cin >> c;
  route_ab = sqrt(a * b);
  if (2 * route_ab < (c - (a + b))) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
