def solve():
    N=int(input())
    A=list(map(int,input().split()))
    B=list(map(int,input().split()))
    X=list(map(int,input().split()))
    Y=list(map(int,input().split()))

    Ans=0
    for i in range(N):
        j=2*i; k=2*i+1

        S_RR=A[j]+A[k]+X[i]
        S_RB=A[j]+B[k]+Y[i]
        S_BR=B[j]+A[k]+Y[i]
        S_BB=B[j]+B[k]+X[i]

        Ans+=max(S_RR, S_RB, S_BR, S_BB)
    return Ans

#==================================================
print(solve())