#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
struct BinaryIndexedTree{
   int N;
   std::vector<int> bit; //1-indexed
   BinaryIndexedTree(int n): N(n), bit(n+1, 0){}
   void add(int a, int w){
       for(int x = a; x <=N; x+=x&(-x)) bit[x] += w;
    }
   int sum(int a){ //1~aまでsum
        int ret = 0;
        for(int x = a; x>0; x-=x&(-x)) ret += bit[x];
        return ret;
    }
};
main(){
    int N,K;
    cin >> N >> K;
    int max_w = 1000000;
    BinaryIndexedTree bit(max_w);
    map<int,int> mp;
    rep(i,0,N){
        int w;
        cin >> w;
        if(w > 0){
            int cnt = bit.sum(max_w) - bit.sum(w-1);
            if(cnt >= K)continue;
            mp[w]++;
            bit.add(w, 1);
        }else{
            if(mp[-w] == 0)continue;
            mp[-w]--;
            bit.add(-w, -1);
        }
    }
    cout << bit.sum(max_w) << endl;
}