LeetCode-Solutions-Java/ │ ├── Arrays/ │ ├── ContainsDuplicate.java │ ├── MissingNumber.java │ ├── FindAllNumbersDisappearedInArray ...

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Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets.

LeetCode’s Java ecosystem is evolving beyond mere algorithmic correctness, with a growing emphasis on code quality metrics such as readability, maintainability, and performance profiling.