一些好的文章/博客

反演原理

http://blog.miskcoo.com/2015/12/inversion-magic-binomial-inversion

莫比乌斯反演

https://www.cnblogs.com/peng-ym/p/8647856.html

关于组合数的小球和盒子

https://www.luogu.org/blog/chengni5673/dang-xiao-qiu-yu-shang-he-zi

狄利克雷卷积与莫比乌斯反演

https://lx-2003.blog.luogu.org/mobius-inversion

FFT与NTT

http://blog.miskcoo.com/2015/04/polynomial-multiplication-and-fast-fourier-transform#i-13

回文自动机讲解

https://blog.csdn.net/u013368721/article/details/42100363

多项式总结

https://www.luogu.org/blog/user7035/duo-xiang-shi-zong-jie

https://blog.csdn.net/semiwaker/article/details/73251486

群论相关

https://blog.csdn.net/xym_CSDN/article/details/53456447

https://blog.csdn.net/y20070316/article/details/50573488

https://fancydreams.ink/2018/08/17/咕咕oi实用群论/

图的匹配

http://www.csie.ntnu.edu.tw/~u91029/Matching.html

仙人掌

http://immortalco.blog.uoj.ac/blog/1955

线段树？

https://blog.bill.moe/segment-tree-beats-notes/

快速子集变换

https://www.cnblogs.com/Dance-Of-Faith/p/8818211.html

半平面交

https://harrybh.github.io/2018/11/29/半平面交/

后缀自动机

https://www.cnblogs.com/zjp-shadow/p/9218214.html#autoid-0-0-0

指数型生成函数(多项式ln的意义)

https://www.cnblogs.com/Mychael/p/9187796.html

动态dp

https://www.cnblogs.com/RabbitHu/p/9112811.html

FWT

https://blog.csdn.net/neither_nor/article/details/60335099

数位dp

https://www.luogu.org/blog/virus2017/shuweidp

有上下界的网络流

https://www.luogu.org/blog/top-oier/qian-tan-you-shang-xia-jie-di-wang-lao-liu

雀魂教程

http://blog.sina.com.cn/seventh9