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#include<bits/stdc++.h>

using namespace std;

int main(){
	int n, k; cin>>n>>k;
	vector<int> a(n); for(int i = 0; i < n; i++)cin>>a[i];
	sort(a.begin(), a.end(), greater<int>());
	int res = k;
	while(res < n && a[res] == a[res-1])res++;
	cout<<res<<"\n";
}