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):
    a1 = A[2 * i]
    a2 = A[2 * i + 1]
    b1 = B[2 * i]
    b2 = B[2 * i + 1]
    x = X[i]
    y = Y[i]
    ans += max(a1 + a2 + x, a1 + b2 + y, b1 + a2 + y, b1 + b2 + x)

print(ans)