#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
int main() {
  ld a, b, c;
  cin >> a >> b >> c;
  ld x = sqrt(a);
  ld y = sqrt(b);
  ld z = sqrt(c);
  if (x + y <= z)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
