N=int(input())
S=list(map(int, input().split()))
T=list(map(int, input().split()))

from collections import Counter as co
A=co(S)
B=co(T)
cnt=N*(A[2]+B[2])-A[2]*B[2]
if A[2]==0 and B[2]==0:
    cnt+=max(A[1],B[1])
elif A[2]==0 and B[2]>0:
    cnt+=B[1]
elif A[2]>0 and B[2]==0:
    cnt+=A[1]

print(cnt)