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Grokking the Coding Interview Patterns in JavaScript

Solution: Subsets II

Explore how to generate all unique subsets from an integer array that may contain duplicates. Learn to apply backtracking combined with sorting and depth-first search to avoid duplicates and handle recursion effectively. Understand the time and space complexity of this approach and gain confidence in solving subset generation challenges during coding interviews.

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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 <= ...