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> list = new ArrayList<>();
		ArrayList<Integer> cut = new ArrayList<>();
		for(int i = 0;i<N;i++){
			list.add(s.nextInt());
			cut.add(i);
		}
		s.close();
		for(int i:cut){
			if(i+1 != list.get(i)){
				int t = list.indexOf(i+1);
				list.set(t, list.get(i));
				list.set(i, i+1);
				K--;
				cut.remove(t);
			}
		}
		if(K > 0&&K%2 == 0){
			K = 0;
		}
		if(K == 0)
			System.out.println("YES");
		else
			System.out.println("NO");
	}

}