#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int a1, b1, c1;
  a1 = sqrt(a);
  b1 = sqrt(b);
  c1 = sqrt(c);
  int d = a1 + b1;
  if (d < c1)
    cout << "Yes";
  else
    cout << "No";
}
