#include <bits/stdc++.h>
using namespace std;
const long long MOD = (1e+9) + 7;
const long long INF = 2e+9 + 10;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  long long a, b, c;
  cin >> a >> b >> c;
  long long d = c - a - b;
  if (0 < d && 4 * a * b < d * d)
    cout << "Yes"
         << "\n";
  else
    cout << "No"
         << "\n";
  return 0;
}
