3644. Maximum K to Sort a Permutation

You are given an integer array nums of length n, where nums is a permutation of the numbers in the range [0..n - 1]. You may swap elements at indices i and j only if nums[i] AND nums[j] == k, where AND denotes the bitwise AND operation and k is a non-negative integer. Return the maximum value of k such that the array can be sorted in non-decreasing order using any number of such swaps. If nums i