Permutations

Medium

Given an array nums of distinct integers, return all possible permutations 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 = [1]
Output: [[1]]

Constraints

• 1 <= nums.length <= 6
• All integers are unique.