n = int(input())
s = list(map(int, input().split()))

c = 0
for i in reversed(range(n)):
    if s.index(i+1) == i :
        s.remove(i+1)
    else:
        c += len(s)-s.index(i+1)-1
        s1 = s*2
        s = s1[s.index(i+1)+1: i-1+s.index(i)]
print(c)