#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  cin >> n >> x >> y;
  if (n == 2 || (x == n / 2 && y == n / 2) || (x == n / 2 && y == n / 2 + 1) ||
      (x == n / 2 + 1 && y == n / 2) || (x == n / 2 + 1 && y == n / 2 + 1))
    cout << "NO";
  else
    cout << "YES";
  return 0;
}
