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

void solve() {
    int k, n;
    cin >> n >> k;
    vector<int> scores(n, 0);
    for (int i = 0; i < n; i++) {
        cin >> scores[i];
    }
    sort(scores.begin(), scores.end());
    for (int i = k; i <= n; i++) {
        if (scores[n-i] != scores[n-k]){
            cout << i-1 << "\n";
            return;
        }
    }
    cout << n << "\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
}