using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Text;
 
public class Program
{
    public void Proc() {
        Reader.IsDebug = false;
        bool ans = this.GetAns();
        Console.WriteLine(ans?"YES":"NO");
    }

    private bool GetAns() {
        long[] inpt = Reader.ReadLine().Split(' ').Select(a=>long.Parse(a)).ToArray();
        int itemCount = (int)inpt[0];
        long nokori = inpt[1];

        int[] items = Reader.ReadLine().Split(' ').Select(a=>int.Parse(a)).ToArray();
        for(int i=1; i<=itemCount; i++) {
            if(items[i-1] != i) {
                if(nokori <= 0) {
                    return false;
                }
                int num = items[i-1];
                int num2 = items[num-1];
                items[i-1] = num2;
                items[num-1] = num;
                nokori--;
            }
        }
        return nokori % 2 == 0;
    }




    public class Reader {
        public static bool IsDebug = true;
        private static System.IO.StringReader SReader;
        private static string InitText = @"


4 2
1 2 3 4

";
        public static string ReadLine() {
            if(IsDebug) {
                if(SReader == null) {
                    SReader = new System.IO.StringReader(InitText.Trim());
                }
                return SReader.ReadLine();
            } else {
                return Console.ReadLine();
            }
        }
    }
    public static void Main(string[] args)
    {
        Program prg = new Program();
        prg.Proc();
    }
}