#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using pint = pair<int,int>;


int main()
{
	int n, k; cin >> n >> k;
	vector<int> p(500);
	for(int i = 0; i < n; i++) {
		int c; cin >> c;
		p[c]++;
	}
	int ans = 0, sum = 0;
	for(int i = 499; i >= 0; i--) {
		sum += p[i];
		if(sum <= k) ans = max(ans, sum);
		else break;
	}
	cout << ans << endl;
}