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#include<bits/stdc++.h>

using namespace std;

#define PB push_back
#define MP make_pair
#define F first
#define S second
#define ALL(x) (x).begin(),(x).end()
#define SIZE(x) (int)(x).size()
#define CLEAR(tab) memset(tab, 0, sizeof(tab))
#define REP(x, n) for(int x = 0; x < (n); x++)
#define FOR(x, b, e) for(int x = (b); x <= (e); x++)
#define FORD(x, b, e) for(int x = (b); x >= (e); x--)
#define VAR(v, n) __typeof(n) v = (n)
#define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define DEBUG(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)

typedef long long int LL;
typedef pair<int,int> PII;
typedef vector<int> VI;

const int MXN = 1000010;
const int C = 262144;
const int INF = 1000000001;
const int MOD = 1000000007;

int n, m;
int a[MXN];

void test() {
	scanf("%d %d", &n, &m);
	for(int i = 0; i < n; i++) {
		scanf("%d", &a[i]);
		a[i] = -a[i];
	}
	sort(a, a + n);
	int iter = m - 1;
	while(iter < n && a[iter] == a[m - 1])
		iter++;
	printf("%d\n", iter);
}

int main() {
	int te = 1;
//	scanf("%d", &te);
	while(te--)
		test();
	return 0;
}