[Acwing] 递归实现排列型枚举

*DDL_GzmBlog 发布时间：2021-09-30 10:06:55 ，浏览量：1

递归实现排列型枚举前言

传送门 : 94. 递归实现排列型枚举 - AcWing题库

思路

先构思递归搜索树

在这里插入图片描述

(看到这就够了)

对于每个节点我们都有 n 种方法

对于每种方法都有已经选了和没选两种状态

因此考虑一下就是下面这种形式

for(int i=1;i


    
        
        
        
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