#include "bits/stdc++.h"
using namespace std;
#define int long long
using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = (ll)1e9 + 7;

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int N, K; cin >> N >> K;
	vector<int>p(N); for (int i = 0; i < N; i++)cin >> p[i];
	int ans = 0;
	for (int i = 0; i <= 400; i++) {
		int cnt = 0;
		for (int j = 0; j < N; j++) {
			if (p[j] >= i)cnt++;
		}
		if (cnt <= K)ans = max(ans, cnt);
	}
	cout << ans << endl;
	return 0;
}