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