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

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static void Main()
    {
        var c = NList;
        var (n, x, m) = (c[0], c[1], c[2]);
        var a = NList;
        while (true)
        {
            var pos = -1;
            for (var i = n - 1; i >= 0; --i)
            {
                if (a[i] >= x)
                {
                    pos = i;
                    break;
                }
            }
            if (pos >= 0)
            {
                if (pos + 1 > m)
                {
                    WriteLine("No");
                    return;
                }
                for (var i = 0; i <= pos; ++i)
                {
                    a[i] /= 2;
                }
                m -= pos + 1;
            }
            else
            {
                WriteLine("Yes");
                return;
            }
        }
    }
}