/* -*- coding: utf-8 -*-
 *
 * 1380.cc:  No.1380 Borderline - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 172;

/* typedef */

/* global variables */

int ps[MAX_N + 1];

/* subroutines */

/* main */

int main() {
  int n, k;
  scanf("%d%d", &n, &k);
  for (int i = 0; i < n; i++) scanf("%d", ps + i);
  sort(ps, ps + n, greater<int>());
  ps[n] = 0;

  while (k > 0 && ps[k] == ps[k - 1]) k--;
  printf("%d\n", k);
  return 0;
}