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Grokking the Coding Interview Patterns in C++

Solution: Subsets II

Explore how to solve the problem of finding all unique subsets from an integer array that may contain duplicates. This lesson guides you through implementing a backtracking solution that uses sorting and depth-first search to avoid duplicate subsets, helping you understand the recursive approach and tradeoffs in 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 <= ...