#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;

const int W_MAX = 1000000;

class BIT
{
private:
	int n;
	vector<int> bit;
public:
	BIT();
	BIT(int a) {
		n = a;
		bit.assign(n + 1, 0);
	}
	~BIT() {
		bit.clear();
	};

	void add(int idx, int val) {
		while (idx <= n) {
			bit[idx] += val;
			idx += idx & -idx;
		}
	}

	int sum(int idx) {
		int ret = 0;
		while (idx > 0) {
			ret += bit[idx];
			idx -= idx & -idx;
		}
		return ret;
	}

	int get(int idx) {
		return sum(idx) - sum(idx - 1);
	}
};

int main() {
	int n, k, w;

	scanf("%d %d", &n, &k);

	BIT bit(W_MAX);
	for (int i = 0; i < n; i++) {
		scanf("%d", &w);
		if (w >= 0) {
			if (bit.sum(W_MAX) - bit.sum(w - 1) < k) {
				bit.add(w, 1);
			}
		} else {
			w = -w;
			if (bit.get(w) > 0) {
				bit.add(w, -1);
			}
		}
	}

	printf("%d\n", bit.sum(W_MAX));
	return 0;
}