#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e17 + 9;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  double a, b, c;
  cin >> a >> b >> c;
  if (c - (a + 2 * sqrt(a * b) + b) > 1e-9)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
