#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
using namespace std;

int main() {
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n, k;
  cin >> n >> k;
  int a[n]; rep(i,n) cin >> a[i];
  int ans = 0;
  rep(i,401){
    int cnt = 0;
    rep(j,n){
      if(a[j] >= i) cnt++;
    }
    if(cnt <= k) ans = max(ans, cnt);
  }
  cout << ans << endl;
}