#include<iostream>
#include<vector>

int main(){
	std::vector<int> contena;
	int n, k;
	std::cin >> n >> k;
	int d = 0;
	for (int i = 0; i < n; ++i){
		int w;
		std::cin >> w;
		if (w > 0){
			int cnt = 0;
			for (auto it = contena.begin(); it != contena.end(); ++it){
				if (*it >= w)cnt++;
			}
			if (cnt < k)contena.push_back(w);
		}
		else{
			for (auto it = contena.begin(); it != contena.end(); ++it){
				if (*it == -w){
					contena.erase(it);
					break;
				}
			}
			//contena.erase(std::remove(contena.begin(), contena.end(), -w),contena.end());
		}
	}
	std::cout << contena.size() << std::endl;
	system("pause");
	return 0;
}