158A Next Round.cpp

#include <iostream>

using namespace std;

int main() {
    int n, k;
    cin >> n >> k;

    int ans=0, rank=0, pre=101;
    int score;
    while (n--) {
        cin >> score;
        if (score==0) break;
    
        if (rank<k) {
            ++rank;
            ++ans;
        } else if (rank==k) {
            if (score==pre) ++ans;
            else break;
        }
        pre = score;
    }
    cout << ans << endl;
    return 0;
}