from collections import Counter


def main():
    n, k = map(int, input().split())
    p = list(map(int, input().split()))

    c = Counter(p).most_common()
    c.sort(key=lambda x: x[0], reverse=True)
    ans = 0
    for _, v in c:
        if ans + v > k:
            exit(print(ans))
        else:
            ans += v
    print(n)


if __name__ == "__main__":
    main()