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🔥Permutations: Full State Space ExplorationMedium
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MediumArrays & Hashing•Acceptance: 77.4%

Permutations: Full State Space Exploration

Targeted in FAANG & Tech OA:GoogleAmazonMicrosoft
Real-World Engineering Context
Used in traveling salesperson route planners, brute-force security keyspace evaluation, and combinatorial scheduling.
Given an array `nums` of distinct integers, return all the possible permutations. You can return the answer in any order.

Sample Test Cases

Input: [[1,2,3]]
Expected: [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
Input: [[0,1]]
Expected: [[0,1],[1,0]]
Input: [[1]]
Expected: [[1]]

Constraints

  • 1 <= nums.length <= 6
  • -10 <= nums[i] <= 10
  • All the integers of nums are unique.
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