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