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Grokking the Coding Interview Patterns in Go

Solution: Subsets II

Explore how to generate all possible unique subsets from an array that may contain duplicates using a sorted backtracking approach. Understand the strategy of skipping duplicate elements at each recursion level to avoid repeated subsets, and learn the time and space complexity of this solution. This lesson helps you implement efficient subset generation with a depth-first search algorithm.

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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 <= ...