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Grokking the Coding Interview Patterns in C++

Solution: Subsets II

Explore how to solve the Subsets II problem by generating all unique subsets from an integer array that may contain duplicates. Understand the backtracking technique combined with sorting and duplicate skipping to efficiently build subsets without repetition. Learn the time and space complexities involved in this depth-first search approach.

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Statement

Given an integer array nums, that can contain duplicate elements,  return all possible subsets while ensuring that each subset is unique. The output must include unique subsets, and you may return them in any order.

Constraints:

  • 1<=1 <= nums.length <=10<= 10

  • −10<=-10 <= nums[i] <=10<= 10 ...