#include <bits/stdc++.h>
using namespace std;
static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
bool ISINT(double x) { return fabs(x - (int)x) < EPS; }
bool ISEQ(double x, double y) { return fabs(x - y) < EPS; }
string itos(long long x) {
  stringstream ss;
  ss << x;
  return ss.str();
}
int main(void) {
  int n, x, y;
  while (cin >> n >> x >> y) {
    if (n / 2 <= x && x <= n / 2 + 1 && n / 2 <= y && y <= n / 2 + 1) {
      cout << "NO\n";
    } else {
      cout << "YES\n";
    }
  }
}
