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This is a verified interview question from Corridor. Candidates reporting seeing this problem in recent Online Assessments (OAs) and onsite rounds. Mastering "Minimum Adjacent Swaps to Group Identical Elements" covers key patterns like Arrays.
"### Problem Given an array (or string of digits/characters), you can swap only adjacent elements. You must transform it so that all identical elements come together (in any order of groups) — i.e., every group is contiguous. You want to minimize inversions (adjacent swaps) to achieve this "beautiful" grouped arrangement. ### Example Input: 3 3 4 2 3 4 2 2 Output: 3 3 3 4 4 2 2 2 (or any permutation where each number forms a block) ### Intuition This is similar to the minimum adjacent swaps to group identical elements problem."
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