import java.util.Arrays;
import java.util.Scanner;

public class HelloWorld {

	    public static void main(String[] args) throws Exception {

	    	Scanner sc = new Scanner(System.in);
	    	int n = sc.nextInt();
	    	int k = sc.nextInt();
	    	int[] pi = new int[n];

	    	for (int i=0; i < n; i ++) {
	    		pi[i] = sc.nextInt();
	    	}
	    	sc.close();
	    	Arrays.sort(pi);

	    	for (int i = n - k; i  < n ; i ++) {
	    		if (pi[i - 1] != pi[i]) {
	    			System.out.println(n - i);
	    			break;
	    		}
	    		if (i == n - 1) {System.out.println(0);}
	    	}

	    	}

	    }