from collections import defaultdict
n,q=map(int,input().split())
A=list(map(int,input().split()))
B=list(map(int,input().split()))
D=defaultdict(int)
for i,j in enumerate(A):
    D[j]=i
now=0
ans=0
for i in B:
    ans+=abs(now-D[i])
    now=D[i]
print(ans)