from collections import defaultdict as dd

N,Q = map(int, input().split())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
idx = dd(int)
for i in range(N):
    idx[A[i]] = i
ans = abs(idx[B[0]]-0)
for i in range(Q-1):
    ans += abs(idx[B[i]]-idx[B[i+1]])
print(ans)