#include <bits/stdc++.h>

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define debug std::cout << "hmm" << std::endl;
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll, ll> pll;
typedef std::vector<int> vi;
typedef std::vector<ll> vl;

template <typename T>
void print(T t)
{
    std::cout << t << ' ';
}
template <typename T1, typename T2>
void print(std::pair<T1, T2> t)
{
    std::cout << '{' << t.first << ' ' << t.second << '}';
}
template <typename T>
void print(std::vector<T> t)
{
    for (auto a : t)
        print(a);
    std::cout << std::endl;
}

main()
{
    std::cin.tie(0)->sync_with_stdio(0);
    std::cin.exceptions(std::cin.failbit);

    int Z = 1;
    //std::cin >> Z;
    while (Z--)
    {
        int n, k;
        std::cin >> n >> k;
        vi V(n);
        for (auto &a : V)
            std::cin >> a;
        std::sort(all(V));
        std::reverse(all(V));
        int i = 1;
        while (i < V.size() && (i < k || V[i] == V[i - 1]))
            i++;
        std::cout << i << std::endl;
    }
}