46. Permutations Leetcode

Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order.



Example 1:

Input: nums = [1,2,3]
Output: [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
Example 2:

Input: nums = [0,1]
Output: [[0,1],[1,0]]
Example 3:

Input: nums = [1]
Output: [[1]]

Time complexity o(n!)

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