#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
long long dx[] = {-1, 0, 1, 0};
long long dy[] = {0, -1, 0, 1};
int32_t main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long a, b, c;
  cin >> a >> b >> c;
  cout << setprecision(25) << fixed;
  long double x = sqrt(a) + sqrt(b), y = sqrt(c);
  if (x + 1e-14 < y) {
    cout << "Yes\n";
  } else
    cout << "No\n";
}
