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#include <cstdio>
#include <queue>

// #define DEBUG_M
#ifdef DEBUG_M
#define DEBUGF(...) printf(stderr, __VA_ARGS__)
#define DEBUG(expr) expr
#else
#define DEBUGF(...)
#define DEBUG(expr)
#endif

using namespace std;

int main() {
	int n;
	int k;
	scanf(" %d %d", &n, &k);
	std::priority_queue<int> scores;
	for (int i = 0; i < n; i++) {
		int tmp;
		scanf(" %d", &tmp);
		scores.push(tmp);
	}
	int get = 0;
	int last = 0;
	while (get < k) {
		last = scores.top();
		scores.pop();
		get++;		
	}
	while (scores.size() && last == scores.top()) {
		scores.pop();
		get++;
	}
	printf("%d\n", get);
}