#include <bits/stdc++.h>
using namespace std;
inline int toInt(string s) {
  int v;
  istringstream sin(s);
  sin >> v;
  return v;
}
template <class T>
inline string toString(T x) {
  ostringstream sout;
  sout << x;
  return sout.str();
}
int main() {
  std::ios::sync_with_stdio(false);
  long long a, b, c;
  cin >> a >> b >> c;
  cout << ((2 * sqrt(a * b) < c - a - b) ? "Yes" : "No") << endl;
}
