#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  long double eps = 1.0E-14;
  if (sqrt(a) + sqrt(b) + eps < sqrt(c)) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
