using System; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Text; using System.Text.RegularExpressions; using System.Linq; using System.IO; class Program { static void Main(string[] args) { new Magatro().Solve(); } } public class Scanner { private StreamReader Sr; private string[] S; private int Index; private const char Separator = ' '; public Scanner() { Index = 0; S = new string[0]; Sr = new StreamReader(Console.OpenStandardInput()); } private string[] Line() { return Sr.ReadLine().Split(Separator); } public string Next() { string result; if (Index >= S.Length) { S = Line(); Index = 0; } result = S[Index]; Index++; return result; } public int NextInt() { return int.Parse(Next()); } public double NextDouble() { return double.Parse(Next()); } public long NextLong() { return long.Parse(Next()); } public decimal NextDecimal() { return decimal.Parse(Next()); } public string[] StringArray(int index = 0) { Next(); Index = S.Length; return S.Skip(index).ToArray(); } public int[] IntArray(int index = 0) { return StringArray(index).Select(int.Parse).ToArray(); } public long[] LongArray(int index = 0) { return StringArray(index).Select(long.Parse).ToArray(); } public bool EndOfStream { get { return Sr.EndOfStream; } } } public class Magatro { private Scanner Sc; private int N; private long K; private int[] D; private void Scan() { Sc = new Scanner(); N = Sc.NextInt(); K = Sc.NextLong(); D = Sc.IntArray(); } public void Solve() { Scan(); int counter = 0; for (int i = 0; i < N; i++) { if (D[i] != i + 1) { counter++; } } if (counter == 0) { Console.WriteLine(K % 2 == 0 ? "YES" : "NO"); } else { Console.WriteLine((K - counter) % 2 == 1 ? "YES" : "NO"); } } }