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