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#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    int numContestants, numTshirts, pos;
    
    ios::sync_with_stdio(false);

    cin >> numContestants >> numTshirts;
    vector<int> contestants(numContestants);
    --numTshirts;

    for(int i=0; i<numContestants; ++i)
        cin >> contestants[i];

    sort(contestants.begin(), contestants.end(), greater<int>());
    pos = numTshirts;

    for(; pos<numContestants && contestants[pos]==contestants[numTshirts]; ++pos);
    
    cout << pos << endl;    

    return 0;
}