#include <bits/stdc++.h>

#include <atcoder/all>

using namespace std;
using namespace atcoder;
#define REP(i, m, n) for (int i = (int)(m); i < (int)(n); ++i)
#define rep(i, n) REP(i, 0, n)
using ll = long long;
#define pint pair<int, int>
#define pll pair<ll, ll>
const int inf = 1e9 + 7;
const ll longinf = 1LL << 60;
const ll mod = 1e9 + 7;

using mint = modint1000000007;

int main() {
  int n, k;
  cin >> n >> k;
  int p[n];
  rep(i, n) cin >> p[i];
  sort(p, p + n, greater<int>());
  while (k > 0 && p[k - 1] == p[k]) {
    k--;
  }
  cout << k << endl;
  return 0;
}