树形dp https://blog.csdn.net/libin66/article/details/51918509#comments

整理模板 多项式求逆 https://blog.csdn.net/samjia2000/article/details/72522936

HDU 5631 Rikka with Graph

https://blog.csdn.net/qq_27925701/article/details/50706507

多校第五场1012）HDU5792 World is Exploding(树状数组)

https://blog.csdn.net/u013569304/article/details/52107348

牛客第十场

AJD

EF H类欧模板

金牌提 B，G，I

C ploya