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):
    ans += max(A[2 * i] + A[2 * i + 1] + X[i],
               B[2 * i] + B[2 * i + 1] + X[i],
               A[2 * i] + B[2 * i + 1] + Y[i],
               B[2 * i] + A[2 * i + 1] + Y[i])
print(ans)