using System;
using System.Collections.Generic;
using System.Linq;

internal class Program
{
    private static void Push(List<int> list, int element)
    {
        var left = 0;
        var right = list.Count - 1;
        while (right - left > 1)
        {
            int middle = (right + left) / 2;
            if (list[middle] == element)
            {
                list.Insert(middle, element);
                return;
            }
            if (list[middle] > element)
            {
                right = middle;
            }
            else
            {
                left = middle;
            }
        }
        for (int i = left; i <= right; i++)
        {
            if (list[i] == element)
            {
                list.Insert(i, element);
                return;
            }
            if (list[i] > element)
            {
                list.Insert(i, element);
                return;
            }
        }
        list.Add(element);
    }

    private static void Remove(List<int> list, int element)
    {
        var left = 0;
        var right = list.Count - 1;
        while (right - left > 1)
        {
            int middle = (right + left) / 2;
            if (list[middle] == element)
            {
                list.RemoveAt(middle);
                return;
            }
            if (list[middle] > element)
            {
                right = middle;
            }
            else
            {
                left = middle;
            }
        }
        for (int i = left; i <= right; i++)
        {
            if (list[i] == element)
            {
                list.RemoveAt(i);
                return;
            }
        }
    }

    public static void Main(string[] args)
    {
        var nAndK = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        var n = nAndK[0];
        var k = nAndK[1];
        var w = new int[n];
        for (int i = 0; i < n; i++)
        {
            w[i] = int.Parse(Console.ReadLine());
        }
        var list = new List<int>();

        for (int i = 0; i < n; i++)
        {
            if (w[i] < 0)
            {
                Remove(list, -w[i]);
            }
            else
            {
                int index = list.Count - k;
                if (index < 0)
                {
                    Push(list, w[i]);
                    continue;
                }
                if (list[index] >= w[i])
                {
                    continue;
                }
                Push(list, w[i]);
            }
        }
        Console.WriteLine(list.Count);
    }
}