import sys
n = int(input())
list_a = [int(i) for i in input().split(' ')]
list_b = [int(i) for i in input().split(' ')]


def max_xor_difference(a, b):
    sum_a = sum(a)
    sum_b = sum(b)

    max_xor_result = 0
    for i in a:
        max_xor_result = max(max_xor_result, (sum_a - i) ^ sum_b)
    for i in b:
        max_xor_result = max(max_xor_result, (sum_b - i) ^ sum_a)

    return max_xor_result


result = max_xor_difference(list_a, list_b)
print(result)