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