#include <bits/stdc++.h>
using namespace std;
string solve() {}
int main() {
  long double a, b, c;
  while (cin >> a >> b >> c) {
    double d = a, e = b, f = c;
    if ((a + b - c) / 2 + sqrt(a * b) < 1e-15 || (d + e - f) < 2 * sqrt(d * e))
      cout << "Yes\n";
    else
      cout << "No\n";
  }
  return 0;
}
