import java.math.*;
import java.util.*;
 
class BIT{
	int[] bit=new int[1000001];
    void add(int a,int w){;
    	for(int x = a;x<=1000000;x+=(x&-x)) {
    		bit[x] += w;
    	}
    }
    int sum(int a){
    	int ret = 0;
    	for(int x = a;x>0;x -= x& -x) ret += bit[x];
    	return ret;
    }
}
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n= sc.nextInt();
        int k = sc.nextInt();
        BIT bit = new BIT();
        int[] aru = new int[1000001];
    	int ans=0;
        for(int i=0;i<n;i++){
        	int temp = sc.nextInt();
        	if(temp>0){
        		if( (bit.sum(1000000)-bit.sum(temp-1))<k){
        		bit.add(temp,1);
        		aru[temp]++;
        		ans++;
        		}
        	}else{
        		if(aru[-temp]>0) {
        			ans--;
        			aru[-temp]--;
        			bit.add(-temp,-1);
        		}
        	}
        }
        System.out.println(ans);
    }
}