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Grokking the Coding Interview Patterns in Go

Solution: Subsets II

Explore how to generate unique subsets from an array that may contain duplicates by applying backtracking techniques. Learn to sort the array and use depth-first search to avoid duplicate subsets efficiently. This lesson helps you implement a systematic approach to solving the Subsets II problem, which is commonly tested in coding interviews, while understanding its time and space complexity.

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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 ...