#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

struct bit {
	vector<ll> v;
	bit(int n) : v(n + 1) {}
	ll sum(int i) {
		ll res = 0;
		for (; i > 0; i -= i & -i) res += v[i];
		return res;
	}
	void add(int i, ll x) {
		for (i++; i < v.size(); i += i & -i) v[i] += x;
	}
};

int main() {
	int N, K; cin >> N >> K;
	bit b(1000001);
	while (N--) {
		int W; cin >> W;
		if (W > 0) {
			if (b.sum(1000001) - b.sum(W) < K)
				b.add(W, 1);
		}
		else {
			if (b.sum(-W + 1) - b.sum(-W) >= 1)
				b.add(-W, -1);
		}
	}
	cout << b.sum(1000001) << endl;
}