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