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