#include <bits/stdc++.h>
const int nax = 1000 * 1007;
const int mod = 1e9 + 7;
int ar[120][120];
using namespace std;
int main() {
  long long a, b, c;
  cin >> a >> b >> c;
  if ((b == a / 2 || b == a / 2 + 1) && (c == a / 2 || c == a / 2 + 1))
    cout << "NO\n";
  else
    cout << "YES\n";
  return 0;
}
