信号与线性系统翻转课堂笔记19——连续/离散系统的零极点与稳定性
The Flipped Classroom19 of Signals and Linear Systems
对应教材:《信号与线性系统分析(第五版)》高等教育出版社,吴大正著
一、要点
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46. Permutations
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]]思路:此题可用回溯…