#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  cin >> n >> x >> y;
  if (n <= 2 ||
      ((x == n / 2 || x == (n / 2) + 1) && (y == n / 2 || y == (n / 2) + 1)))
    cout << "NO" << endl;
  else
    cout << "YES" << endl;
}
