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