#include "bits/stdc++.h"
using namespace std;

#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)

int N,K,W;
#define DEV 1000
#define MAX1 (int)1e6*2
#define MAX2 (int)1e6*2/DEV+100
int count1[MAX1];
int count2[MAX2];

int jforn(int n) {
    return n / DEV;
}

int count(int n) {
    int j = jforn(n);
    int ret = 0;
    RREP(i,MAX2) {
        if (i <= j) break;
        ret += count2[i];
    }
    RREP(i,DEV) {
        int k = j * DEV + i;
        if (k < n) break;
        ret += count1[k];
    }
    return ret;
}
signed main()
{
    cin>>N>>K;
    REP(i,N) {
        cin >> W;
        int j = abs(W);
        if (W > 0) {
            if (count(j) < K) {
                count1[j]++;
                count2[jforn(j)]++;
            }
        } else {
            // あれば下ろせる
            if (count1[j]) {
                count1[j]--;
                count2[jforn(j)]--;
            }
        }
    }
    cout << count(0) << endl;
    return 0;
}