def main():
    N, K = map(int, input().split())
    scores = list(map(int, input().split()))
    scores.sort(reverse=True)

    if K == N:
        print(N)
        return

    if scores[K-1] > scores[K]:
        print(K)
        return

    print(scores.index(scores[K-1]))


if __name__ == "__main__":
    main()