#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, c;
  cin >> a >> b >> c;
  long long int aa = a + b + 2 * ((float)sqrt(a * b));
  if (aa < c)
    cout << "Yes";
  else
    cout << "No";
  return 0;
}
