n=int(input())
a=list(map(int,input().split()))
l=[0]*(n+1)
for i in range(len(a)) :
    if l[a[i]] == 0 :
        l[a[i]]=i
    else:
        l[a[i]]=i-l[a[i]]

o=0
for i in l :
    o+=i
print(o)