import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        int[] arr = new int[n + 2];
        for (int i = 0; i < n; i++) {
            arr[i] = -sc.nextInt();
        }
        arr[n] = Integer.MIN_VALUE;
        Arrays.sort(arr);
        while (arr[k] == arr[k + 1]) {
            k--;
        }
        System.out.println(k);
    }
}