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