def solve(n, a, b, x, y):
    ans = 0
    for i in range(n):
        ans += max(a[2 * i] + a[2 * i + 1] + x[i], a[2 * i] + b[2 * i + 1] + y[i], b[2 * i] + a[2 * i + 1] + y[i], b[2 * i] + b[2 * i + 1] + x[i])
    return ans

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()))

print(solve(n, a, b, x, y))