Inversion Principle
http://blog.miskcoo.com/2015/12/inversion-magic-binomial-inversion
Mobius inversion
https://www.cnblogs.com/peng-ym/p/8647856.html
Balls and boxes on the number of combinations of
https://www.luogu.org/blog/chengni5673/dang-xiao-qiu-yu-shang-he-zi
Mobius inversion and Dirichlet convolution
https://lx-2003.blog.luogu.org/mobius-inversion
FFT with NTT
http://blog.miskcoo.com/2015/04/polynomial-multiplication-and-fast-fourier-transform#i-13
Palindrome automaton explain
https://blog.csdn.net/u013368721/article/details/42100363
Polynomial summary
https://www.luogu.org/blog/user7035/duo-xiang-shi-zong-jie
https://blog.csdn.net/semiwaker/article/details/73251486
Group theory related
https://blog.csdn.net/xym_CSDN/article/details/53456447
https://blog.csdn.net/y20070316/article/details/50573488
https://fancydreams.ink/2018/08/17/%E5%92%95%E5%92%95oi%E5%AE%9E%E7%94%A8%E7%BE%A4%E8%AE%BA/
Matching map
http://www.csie.ntnu.edu.tw/~u91029/Matching.html
cactus
http://immortalco.blog.uoj.ac/blog/1955
Segment tree?
https://blog.bill.moe/segment-tree-beats-notes/
Fast subset of transformation
https://www.cnblogs.com/Dance-Of-Faith/p/8818211.html
Half plane cross
https://harrybh.github.io/2018/11/29/%E5%8D%8A%E5%B9%B3%E9%9D%A2%E4%BA%A4/
Suffix automata
https://www.cnblogs.com/zjp-shadow/p/9218214.html#autoid-0-0-0
Exponential generating function (sense of polynomial ln)
https://www.cnblogs.com/Mychael/p/9187796.html
Dynamic dp
https://www.cnblogs.com/RabbitHu/p/9112811.html
FWT
https://blog.csdn.net/neither_nor/article/details/60335099
Digital dp
https://www.luogu.org/blog/virus2017/shuweidp
There are upper and lower bounds of the network flow
https://www.luogu.org/blog/top-oier/qian-tan-you-shang-xia-jie-di-wang-lao-liu
