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

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return std::vector(arg, init);
    else return std::vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

int main() {
    int n, k; cin >> n >> k;
    auto p = vec<int>(uns, n);
    for (auto &e : p) cin >> e;

    int ans = 0;
    for (int i = 0; i <= 400; ++i) {
        int cnt = 0;
        for (auto e : p) {
            cnt += i <= e;
        }

        if (cnt <= k) {
            ans = max(ans, cnt);
        }
    }

    cout << ans << endl;
}