LeetCode331.验证二叉树的前序序列化-白红宇

LeetCode331.验证二叉树的前序序列化

阅读量：796 次

发布时间：2023-01-31

本文共 147 字，大约阅读时间需要 1 分钟。

如何判断前序序列是否能重建二叉树？通过分析前序遍历节点间隔关系，利用槽位概念依次处理每个节点。步骤如下：

初始槽位数：为1。

遍历前序字符串，遇到逗号：

消耗一个槽位。

非空节点新增两个槽位。

若槽位变负，序列非法。

处理最后节点，检查槽位是否为0。

这种方法可行，能有效判断前序序列的合法性。

转载地址：http://tmgyk.baihongyu.com/

你可能感兴趣的文章

NMAP网络扫描工具的安装与使用

NMF(非负矩阵分解)

nmon_x86_64_centos7工具如何使用

NN&DL4.1 Deep L-layer neural network简介

NN&DL4.3 Getting your matrix dimensions right

NN&DL4.7 Parameters vs Hyperparameters

NN&DL4.8 What does this have to do with the brain?

nnU-Net 终极指南

No 'Access-Control-Allow-Origin' header is present on the requested resource.

No 'Access-Control-Allow-Origin' header is present on the requested resource.

NO 157 去掉禅道访问地址中的zentao

no available service ‘default‘ found, please make sure registry config corre seata

No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

no connection could be made because the target machine actively refused it.问题解决

No Datastore Session bound to thread, and configuration does not allow creation of non-transactional

No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005

No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc

No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法

No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'

No module named 'crispy_forms'等使用pycharm开发