#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using st = string;
using db = double;
using vll = vector<long long>;
using vvll = vector<vll>;
using vchar = vector<char>;
ll mod = 1000000007;
int main() {
  ll a, b, c;
  cin >> a >> b >> c;
  cout << (4 * a * b < (c - a - b) * (c - a - b) && c - a - b > 0 ? "Yes"
                                                                  : "No")
       << endl;
}
