#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
using ll = long long;
int n,k;
vector<int> w;

int op(int l,int r){
	return l+r;
}

int e(){
	return 0;
}


void solve(){
	segtree<int,op,e> SEG(100001);
	for(int i = 0;i<n;i++){
		if(w[i]<0){
			if(SEG.get(-w[i])<=0){
			}else{
				SEG.set(-w[i],SEG.get(-w[i])-1);
			}
		}else{
			if(SEG.prod(w[i],100001)>=k){
			}else{
				SEG.set(w[i],SEG.get(w[i])+1);
			}
		}
	}
	cout<<SEG.all_prod()<<endl;
}

signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cin >> n >> k;
	w = vector<int>(n);
	for(auto &i:w)cin >> i;
	solve();
}