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#include<bits/stdc++.h>

#define st first
#define nd second
#define pb(x) push_back(x)
#define pp(x) pop_back(x)
#define mp(a, b) make_pair(a, b)
#define all(x) (x).begin(), (x).end()
#define rev(x) reverse(all(x))
#define sor(x) sort(all(x))
#define sz(x) (int)(x).size()
#define rsz(x) resize(x)

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii > vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef string str;
#define BOOST ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int main()
{
    BOOST
    ll n,k;
    cin>>n>>k;
    vi V;
    V.rsz(n);
    for(int i = 0  ; i <  n ; i++)
        cin>>V[i];
    sor(V);
    for(int i = k ; i < n ; i++)
    {
        if(V[n-1-i] < V[n-k])
        {
            cout<<i;
            return 0;
        }
    }
    cout<<n;
    return 0;
}