from sys import stdin
n, *p = map(int, stdin.read().split())
ans = 0
ichi = [0 for i in range(n)]
for i in range(n):
    for j in range(n):
        ichi[p[j]-1] = j
    for j in range(i,p[i]-1):
        ans += 1
        p[ichi[j]], p[ichi[j+1]] = p[ichi[j+1]], p[ichi[j]]

print("{}".format(ans))