#include <bits/stdc++.h>
using namespace std;
int main() {
  long double a, b, c;
  cin >> a >> b >> c;
  long double d = sqrtl(c) - sqrtl(a);
  d -= sqrtl(b);
  if (d <= 0.0l)
    cout << "No" << endl;
  else
    cout << "Yes" << endl;
  return 0;
}
