#include <bits/stdc++.h>
using namespace std;

const int MAX_SCORE = 400;

int main() {
  int n, k;
  cin >> n >> k;
  vector<int> p(n);
  for (int& p_ : p) {
    cin >> p_;
  }
  int ans = 0;
  for (int score = 0; score <= MAX_SCORE; score++) {
    int count = 0;
    for (int& p_ : p)
      if (p_ >= score)
	count++;
    if (count <= k)
      ans = max(ans, count);
  }
  cout << ans << '\n';
  return 0;
}