import sys
input = sys.stdin.readline
N, K = map(int, input().split())
multitap = list(map(int, input().split()))
plugs = []
count = 0
for i in range(K):
if multitap[i] in plugs:
continue
if len(plugs) < N:
plugs.append(multitap[i])
continue
multitap_idxs = []
hasplug = True
for j in range(N):
if plugs[j] in multitap[i:]:
multitap_idx = multitap[i:].index(plugs[j])
else:
multitap_idx = 101
hasplug = False
multitap_idxs.append(multitap_idx)
if not hasplug:
break
plug_out = multitap_idxs.index(max(multitap_idxs))
del plugs[plug_out]
plugs.append(multitap[i])
count += 1
print(count)