#include <bits/stdc++.h>
using namespace std;
const static long long INF = 1e9;
const static long long MAXN = 301;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  long double ab = sqrt((long double)(a * b));
  if (a + b - c + 2 * ab < 0)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
