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