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

public class YourName {
	static ArrayList<Integer> list = new ArrayList<>();
	static long K;
	static int N;

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		N = s.nextInt();
		K = s.nextLong();
		for(int i = 0;i<N;i++){
			list.add(s.nextInt());
		}
		s.close();
		for(int i = 0;i<N;i++){
			swtch(i);
		}
		if(K > 0&&K%2 == 0){
			K = 0;
		}
		if(K == 0)
			System.out.println("YES");
		else
			System.out.println("NO");
	}
	
	static void swtch(int i){
		if(i+1 != list.get(i)){
			int t = list.indexOf(i+1);
			list.set(t, list.get(i));
			list.set(i, i+1);
			K--;
		}
	}

}