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#include <bits/stdc++.h>
 
#define st first
#define nd second
#define pb push_back
#define BOOST ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
#define PI 3.14159265359
 
using namespace std;
 
typedef long long ll;
constexpr ll MOD = 1000000007, sup = 29;
constexpr ll MOD_1 = 1234567891, sup_1 = 1009;
constexpr ll MOD_2 = 1000000009, sup_2 = 107;
constexpr int MXN = 2000+10, CZAPA = (1<<19)/*, INF = 1000000000*/;
constexpr ll INF = 1000000000000000000;

int tab[MXN];

int main(){
	BOOST;
	
	int n, k;
	cin>> n >> k;
	for(int i=0; i<n; i++){
		cin>> tab[i];
		tab[i] *= -1;
	}
	sort(tab, tab+n);
	int ans = 0;
	for(int i=0; i<n; i++){
		if(tab[i] <= tab[k-1])
			ans++;
	}
	cout<< ans << '\n';


	return 0;
}