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/*
	Zadanie: Koszulki
	Autor: Tomasz Kwiatkowski
*/

#include <bits/stdc++.h>

#define fi first
#define se second
#define pb push_back

using namespace std;
typedef long long ll;

const int MAXN = 1000*1000 + 7;
const int INF = 1000*1000*1000 + 7;

int main()
{
	ios_base::sync_with_stdio(0), cin.tie(0);
	
	int n, k;
	cin >> n >> k;
	vector<int> sizes(n);
	for (auto& s : sizes)
		cin >> s;
	sort(sizes.rbegin(), sizes.rend());
	int i = 0;
	while (i < k || (sizes[i] == sizes[i - 1])) {
		++i;
	}
	cout << i << '\n';
	return 0;
}