from collections import defaultdict
N = int(input())
S = list(map(int,input().split()))
T = list(map(int,input().split()))
dicS = defaultdict(int); dicT = defaultdict(int)
for i in range(N):
  dicS[S[i]] += 1
  dicT[T[i]] += 1

if dicS[2] == 0 and dicT[2] == 0:
  ans = max(dicS[1],dicT[1])
elif dicS[2] == 0:
  ans = N*dicT[2] + (N-dicT[2]-dicT[0])
elif dicT[2] == 0:
  ans = N*dicS[2] + (N-dicS[2]-dicS[0])
else:
  ans = N*(dicS[2]+dicT[2]) - (dicS[2]*dicT[2])
print(ans)