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#include <iostream>
#include <algorithm>
#include <functional>

int main()
{
    int contestants, minShirts;
    std::cin >> contestants >> minShirts;
    int* points = new int[contestants];

    for (int i = 0; i < contestants; i++)
    {
        std::cin >> points[i];
    }

    std::sort(points, points + contestants, std::greater<int>());

    int counter = minShirts;
    while (points[counter] == points[counter - 1])
    {
        counter++;
    }

    std::cout << counter;

    delete[] points;
}