#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using vvi = vector<vi>;
int main() {
  long double a, b, c;
  cin >> a >> b >> c;
  if ((sqrt(a) + sqrt(b)) < sqrt(c)) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
