#include <iostream>

using namespace std;

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

    int n, k, a, points, j, result;
    int count_results[121]; // points from 0 to 120

    for (int i = 0; i < 121; ++i) {
        count_results[i] = 0;
    }

    cin >> n >> k;

    for (int i = 0; i < n; ++i) {
        cin >> a;
        ++count_results[a];
    }

    points = 120;
    j = k;
    while (j > 0) {
        j -= count_results[points];
        --points;
    }

    if (j < 0) {
        result = -j + k;
    } else { // j == 0
        result = k;
    }

    cout << result;

    return 0;
}