/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
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*******************************************************************************/

#include <iostream>
#include<algorithm>

using namespace std;

bool porownaj(int a, int b)
{
	return a>b;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int a, b;
    
    cin>>a>>b;
    int tab[a]={0};
    for (int i = 0; i < a; i++)
        cin >> tab[i];
    sort(tab, tab+a, porownaj);
    
    
    int j=b;
    int licznik=b;

while (tab[j]==tab[b-1]){
    licznik+=1;
    j+=1;
}
cout<<licznik;




    return 0;
}