Backtracking: Generating Permutations

Problem Link Summary Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order. Test cases: Input: nums = [1,2,3] Output: [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]] Input: nums = [0...