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#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,k,i,a;
	vector <int> v;
	scanf("%d%d",&n,&k);
	for(i=0;i<n;i++){
		scanf("%d",&a);
		v.push_back(a);
	}
	sort(v.begin(),v.end(),greater());
	i=k-1;
	while(i+1<n && v[i]==v[i+1])
		i++;
	printf("%d\n",i+1);
	return 0;
}