using static System.Math;
using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var k = int.Parse(line[1]);
        line = Console.ReadLine().Trim().Split(' ');
        var p = Array.ConvertAll(line, int.Parse);
        getAns(k, p);
    }
    static void getAns(int k, int[] p)
    {
        var ans = 0;
        for (int i = 0; i <= 400; i++)
        {
            var ok = p.Count(x => x > i);
            if (ok <= k) ans = Max(ans, ok);
        }
        Console.WriteLine(ans);
    }
}