Given an array arr[] of N positive elements. The task is to find the Maximum AND Value generated by any pair(arr_{i, }arr_{j}) from the array such that i != j.
Note: AND is bitwise '&' operator.
Example 1:
Input:
N = 4
arr[] = {4, 8, 12, 16}
Output: 8
Explanation:
Pair (8,12) has the Maximum AND Value 8.
Example 2:
Input:
N = 4
arr[] = {4, 8, 16, 2}
Output: 0
Explanation: Any two pairs of the array has
Maximum AND Value 0.
Your Task:
You don't need to read input or print anything. Your task is to complete the function maxAND() which takes the array elements and N (size of the array) as input parameters and returns the maximum AND value generated by any pair in the array.
Expected Time Complexity: O(N * log M), where M is the maximum element of the array.
Expected Auxiliary Space: O(1).
Constraints:
1 <= N <= 10^{5}
1 <= arr[i] <= 10^{5}

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