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