using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] s = Console.ReadLine().Split(' ');
            string[] t = Console.ReadLine().Split(' ');
            long K = long.Parse(s[1]);
            long C = 0;
            long[] p = new long[long.Parse(s[0])];
            for (int i = 0; i < t.Length; i++) p[i] = long.Parse(t[i]);
            for (int i = 0; i < p.Length; i++)
            {
                long min = p[i];
                long index = 0;
                for (int j = i;j < p.Length; j++)
                {
                    if(min > p[j])
                    {
                        min = p[j];
                        index = j;
                    }
                }

                if(p[i] != min)
                {
                    long tmp = p[i];
                    p[i] = p[index];
                    p[index] = tmp;
                    C++;
                }
            }
            if((K - C) % 2 == 0)
            {
                Console.WriteLine("{0}", "YES");
            }
            else
            {
                Console.WriteLine("{0}", "NO");
            }
            
            
            //Console.ReadLine();
        }
    }
}