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