N = int(input())
S = list(map(int, input().split()))
T = list(map(int, input().split()))
s0, s1, s2 = S.count(0), S.count(1), S.count(2)
t0, t1, t2 = T.count(0), T.count(1), T.count(2)

if 2 in S:
    if 0 in S:
        print(s2*N+s1)
    else:
        if 2 in T:
            print((s2+t2)*N-s2*t2)
        else:
            print(s2*N+s1)
elif 2 in T:
    if 0 in T:
        print(t2*N+t1)
    else:
        if 2 in S:
            print((s2+t2)*N-s2*t2)
        else:
            print(t2*N+t1)
else:
    print(max(s1, t1))