#include <bits/stdc++.h>
using namespace std;
long long int x[1000007], y[1000007], z[1000007], n;
string s, S;
vector<long long int> v;
int main() {
  {
    long long int a = 0, b = 0, c = 0, d, e, f, g, i, j, k, l, m, p, q, r, u, w,
                  t, tc, in, mod, loc, diff, val, sz, lo, hi, mid,
                  mn = 2134567891, mx = 0, sum = 0, ans = 0;
    cin >> n >> a >> b;
    n /= 2;
    if ((n == a || n == a - 1) && (n == b || n == b - 1))
      cout << "NO\n";
    else
      cout << "YES\n";
  }
  return 0;
}
