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

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
    int a,b;
    cin>>a>>b;
    vector<int> v;
    for(int x=0;x<a;x++)
    {
        int c;
        cin>>c;
        v.push_back(c);
    }
    sort(v.begin(),v.end());
    reverse(v.begin(),v.end());
    v.push_back(0);
    int it = b;
    while(v[it] == v[b-1])
        it++;
    cout<<it;
	return 0;
}