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Grokking the Coding Interview Patterns in Python

Solution: Subsets II

Explore how to use backtracking and sorting techniques to generate all unique subsets of an integer array containing duplicates. Understand how to skip duplicate elements during recursion, build subsets step-by-step, and handle time and space complexity considerations to solve the Subsets II problem effectively.

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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 <= ...