Maximise the OR Sum Problem Statement

You are provided with two arrays of positive integers. The goal is to select two sub-arrays of the same length, one from each of the provided arrays, such that the sum of the bitwise OR of these sub-arrays is maximized. Return the maximum sum possible.

Example:

Input:

First array: arr1 = [1,5,8,4]
Second array: arr2 = [3,7,16,1]

Output:

26

Explanation:

Select the sub-array {5,8} from the first array (arr1), and the sub-array {7,16} from the second array (arr2). The OR sum is calculated as 13 + 23 = 26, which is the maximum possible.

Constraints:

• 1 <= T <= 10
• 1 <= N <= 10^5
• 1 <= arr1[i], arr2[i] <= 10^5
• Time Limit: 1 sec.