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()))

score = 0
change = []
for i in range(n):
    a1,a2 = A[2*i],A[2*i+1]
    b1,b2 = B[2*i],B[2*i+1]

    x,y = X[i],Y[i]
    same = max(a1+a2,b1+b2)+x
    dif = max(a1+b2,a2+b1)+y
    score += same
    change.append(dif-same)

ans = score
change.sort(reverse=True)
for c in change:
    score += c
    ans = max(ans,score)
print(ans)