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

X=[S.count(i) for i in range(N)]
Y=[T.count(j) for j in range(N)]


if X[2]==Y[2]==0:
    print(max(X[1],Y[1]))
elif X[2]*Y[2]!=0:
    print((N-X[0])*(N-Y[0])-X[1]*Y[1])
elif X[2]==0 and Y[2]!=0:
    print(N*Y[2]+Y[1])
else:
    print(N*X[2]+X[1])