#include <bits/stdc++.h>
using namespace std;
const long double EPS = 1e-15;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (sqrt(a) + sqrt(b) + EPS < sqrt(c)) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
