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

//#define int long long
#define st first
#define nd second
#define bg begin
#define ed end
#define pb push_back
#define all(r) bg(r),ed(r)
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0) 

int32_t main(){
	fast;
	int n,k;
	cin>>n>>k;
	vector<int>v(n);
	for(auto &x:v){
		cin>>x;
	}
	sort(all(v),greater<int>());
	int i=k;
	while(i<n&&v[i-1]==v[i]){
		i++;
	}
	cout<<i<<'\n';
}