import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long k = sc.nextLong();
        int[] arr = new int[n + 1];
        for (int i = 1; i <= n; i++) {
            arr[i] = sc.nextInt();
        }
        int count = 0;
        for (int i = 1; i <= n; i++) {
            if (i != arr[i]) {
                int x = arr[i];
                arr[i] = arr[x];
                arr[x] = x;
                count++;
            }
        }
        if (k % 2 == count % 2) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}