#include <bits/stdc++.h>
using namespace std;
int main(void) {
  long long int a, b, c;
  cin >> a >> b >> c;
  long double ra = sqrt(a);
  long double rb = sqrt(b);
  long double rc = sqrt(c);
  long double rx = ra + rb;
  if (rx >= rc) {
    cout << "No" << endl;
  } else {
    cout << "Yes" << endl;
  }
}
