using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;

class Program
{
    static void Main()
    {
        var K = ReadLine().Split().Select(int.Parse).ToArray();
        WriteLine(ReadLine().Split().Select(int.Parse).Select(x => x % (K[1] + 1)).Aggregate((x, y) => x ^ y) == 0 ? "NO" : "YES");
    }
}