import java.util.ArrayList;
import java.util.Scanner;

public class YourName {

	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();
		for(int i : D){
			if(i > 0 && i != D.get(i-1)){
				while(true){
					int t = D.get(i-1);
					D.set(D.indexOf(i), 0);
					if(t == 0){
						break;
					}
					i = t;
					K--;
				}
			}
		}
		if(K > 0&&K%2 == 0){
			K = 0;
		}
		if(K == 0)
			System.out.println("YES");
		else
			System.out.println("NO");
	}
	
}