import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Queue;
import java.util.Scanner;

public class YourName2 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int N = s.nextInt();
		long K = s.nextLong();
		ArrayList<Integer> D = new ArrayList<>();
		
		for(int i = 0;i<N;i++){
			D.add(s.nextInt());
		}
		s.close();
		Queue<Integer> C = new ArrayDeque<>();
		C.addAll(D);
		
		while(C.size() > 0){
			int i = C.poll();
			int k = D.indexOf(i);
			while(k != i-1){
				int A = D.get(i-1);
				i = A;
				K--;
				C.remove(i);
			}
		}
		if(K > 0&&K%2 == 0){
			K = 0;
		}
		if(K == 0)
			System.out.println("YES");
		else
			System.out.println("NO");
	}
}