24 kinds of commonly used algorithm NOIp
https://blog.csdn.net/weixin_40676873/article/details/81166139
NOIP algorithm summary (from Aha Lei column )
https://blog.csdn.net/lanshuizhiyun/article/details/77337453
NOIP algorithm summary
https://www.cnblogs.com/yangqingli/p/4925011.html