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#include <bits/stdc++.h>
using namespace std;

int main()
{
	ios_base::sync_with_stdio(0);
	
	long long n, k, a, s=0;
	vector <long long> v;
	
	cin >> n >> k;
	
	for (int i=0; i<n; i++)
	{
		cin >> a;
		v.push_back(a);
	}
	
	sort(v.begin(), v.end());
	
	s=k;
	k=n-k-1;
	
	while (v[k]==v[k+1])
	{
		s++;
		k--;
	}
	
	cout << s;
	
	return 0;
}