N = int(input());
a = [int(i) for i in input().split()]
maxIndex = a.index(N)
i = maxIndex - 1
b = 0
while i >= 0:
	if a[i] == N - b - 1:
		b += 1
	i -= 1
ans = (N - maxIndex - 1) + (maxIndex - b)
print (ans)