package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var scanner = bufio.NewScanner(os.Stdin)

func Scan() (input string) {
	if scanner.Scan() {
		input = scanner.Text()
	}
	return
}

func Sign(n int) (int, string) {
	if n >= 0 {
		return n, "+"
	} else {
		ns := []byte(strconv.Itoa(n))
		n, _ := strconv.Atoi(string(ns[1:]))
		return n, "-"
	}
}

func Sum(xs ...int) (s int) {
	for _, x := range xs {
		s += x
	}
	return
}

func main() {
	list := make([]int, 1000001)

	NK := strings.Split(Scan(), " ")
	N, _ := strconv.Atoi(NK[0])
	K, _ := strconv.Atoi(NK[1])

	for i := 0; i < N; i++ {
		W, _ := strconv.Atoi(Scan())
		W, s := Sign(W)

		if s == "+" {
			if Sum(list[W:]...) < K {
				list[W] += 1
			}
		} else if s == "-" {
			if list[W] > 0 {
				list[W] -= 1
			}
		}
	}
	fmt.Println(Sum(list...))
}