原题链接 这道题可以说基本涵盖了树的大部分知识点——树的创建,树的生成,树的删除,树的BFS(宽度优先搜索)。个人认为是学习树时很具有价值的一道题目。 题目意思很好理解,讨论区的题解写的也比本人优秀太多了,这里就不具体分析了。本栏目推荐文章AtCoder World Tour 2022 B The Greatest TwoIntroducing the incident managementA connection was successfully established with the server but then an error《RAPL: A Relation-Aware Prototype Learning Approach for Few-Shot Document-Level Relation Extraction》阅读笔记An improved LSTM-based model for identifying high working intensity load segments of the tractor load spectrumweb项目启动时dubbo报错: No provider available for the service com.davidhu.shopguide.api.service.UserEventService from the url zookeeper ://localhost:2181/org.apache.du初中英语优秀范文100篇-056I have the courage to accept the challenge-我有勇气接受挑战org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method could not be invoked with the incoming messageredis报错MISCONF Errors writing to the AOF file: No space left on device,磁盘满无法写入数据报错[linux kernel] struct pid && the way the kernel used to cast uint32_t pid to struct task_struct层次 Trees level 122 the层次trees level 122 层次trees level uva p5074 trees eat the 122 122e 需求122 122d trees increasing 122e lcms arc 套路leetcode股票122