#include <bits/stdc++.h>
using namespace std;
int main() {
  long double a, b, c;
  cin >> a >> b >> c;
  int x;
  x = c * c + a * a + b * b - 2 * a * c - 2 * a * b - 2 * b * c;
  if (x > 0) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
