3948. Lexicographically Maximum MEX Array

You are given an integer array nums. You want to construct an array result by repeatedly performing the following operation until nums becomes empty: - Choose an integer k such that 1 <= k <= len(nums). - Compute the MEX of the first k elements of nums. - Append this MEX to result. - Remove the first k elements from nums. Return the lexicographically maximum array result that can be obtained