#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  auto sq = [](double number) {
    double error = 0.0000001;
    double s = number;
    while ((s - number / s) > error) s = (s + number / s) / 2;
    return s;
  };
  double a, b, c;
  cin >> a >> b >> c;
  cout << (pow(a, 0.5) + pow(b, 0.5) < pow(c, 0.5) ? "Yes\n" : "No\n");
  return 0;
}
