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();

        Dictionary<int, int> numIndex = new Dictionary<int, int>();
        Dictionary<int, int> indexNum = new Dictionary<int, int>();

        for(int i=0; i<items.Length; i++) {
            indexNum.Add(i, items[i]);
            numIndex.Add(items[i], i);
        }

        for(int i=1; i<=itemCount; i++) {
            if(items[i-1] == i) {
                continue;
            }
            if(nokori <= 0) {
                return false;
            }
            int idx = numIndex[i];
            int num = items[i-1];

            items[i-1] = items[idx];
            items[idx] = num;

            numIndex[i] = i-1;
            numIndex[num] = idx;
            indexNum[i-1] = i;
            indexNum[idx] = num;
            nokori--;
        }

        return nokori%2==0;
    }




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







";
        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();
    }
}