https://www.luogu.com.cn/blog/334586/csp-pre-knowledge

https://zhuanlan.zhihu.com/p/310407056

https://www.cnblogs.com/indigo0106/p/12521413.html

https://blog.csdn.net/weixin_46522531/article/details/126818407

https://www.luogu.com.cn/blog/A-dreamer-in-GXSC/liao-suo-chu-sai

祝广大谷民csp2022 rp++