#include <bits/stdc++.h>
using ll = long long;
using namespace std;
int main() {
  long double a, b, c;
  cin >> a >> b >> c;
  long double d = sqrt(a);
  long double e = sqrt(b);
  long double g = d * e;
  long double f = c - a - b;
  if (c - a - b < 0) {
    cout << "No" << endl;
    return 0;
  }
  f /= 2.0;
  if (g < f)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
