CodeForces 631A 631A - Interview

#include <iostream>
#include <cstdio>

const int MAX = 1e3 + 5;
__int64 arr1[MAX], arr2[MAX];

int main()
{
int num;
std::cin >> num;
for (int i = 1; i <= num; ++i)
{
std::cin >> arr1[i];
}
for (int i = 1; i <= num; ++i)
{
std::cin >> arr2[i];
}
__int64 max_sum = 0, curr_sum = 0, sum_a = 0, sum_b = 0;
for (int i = 1; i <= num; ++i)
{
if (arr1[i] + arr2[i] > (arr1[i] | sum_a) + (arr2[i] | sum_b))
{
curr_sum = arr1[i] + arr2[i];
sum_a = arr1[i];
sum_b = arr2[i];
}
else
{
sum_a = (sum_a | arr1[i]);
sum_b = (sum_b | arr2[i]);
//std::cout << sum_a << sum_b << std::endl;
curr_sum = sum_a + sum_b;
}
if (curr_sum >= max_sum)
{
max_sum = curr_sum;
}
}
std::cout << max_sum << std::endl;

return 0;
}