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

int main() {
  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  for (int i=0; i<n; ++i)
    cin >> a[i];
  sort(a.begin(), a.end());
  int p = a[n - k];
  int c = 0;
  for (int x: a)
    if (x >= p)
      ++c;
  cout << c << endl;
}