import collections as c
n,k = map(int,input().split())
p = list(map(int,input().split()))
s = c.Counter(p)
t = []
for i,j in s.items():
    t.append([i,j])
t.sort(reverse = True)
cnt = 0
ans = 0
while ans+t[cnt][1]<=k and cnt<len(t):
    ans += t[cnt][1]
    cnt += 1
print(ans)