using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var x = int.Parse(line[1]);
        line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, int.Parse);
        getAns(n, x, a);
    }
    static void getAns(int n, int x, int[] a)
    {
        var u = 0;
        var e = 0;
        var d = 0;
        foreach(var w in a)
        {
            if (w > x) u++;
            else if (w < x) d++;
            else { Console.WriteLine("Yes"); return; }
        }
        if (u >= 1 && d >= 1) Console.WriteLine("Yes");
        else Console.WriteLine("No");
    }
}