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N,num,tNum = input(), 0, 0
nus        = map(int, raw_input().split())
sNus       = sorted(nus)
for i in range(N):
    if nus[i] != sNus[i]:
        num += 1 + tNum
        tNum = 0
    elif num > 0:
        tNum += 1
print num
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