容斥与反演

[容斥计数学习笔记](https://www.luogu.com.cn/blog/Troverld/Min-Max-Inclusion-and-Exclusion) [反演与狄利克雷卷积 - Alex_Wei](https://www.cnblogs.com/alex-wei/p/Dirichlet.html) [二项式反演及其应用 - GXZlegend](https://www.cnblogs.com/GXZlegend/p/11407185.html) [【知乎】常见反演的矩阵推导](https://zhuanlan.zhihu.com/p/496814932) [「学习笔记」各类容斥反演总结 - do-while-true](https://www.cnblogs.com/do-while-true/p/15179782.html) [炫酷反演魔术 - vfleaking](https://vfleaking.blog.uoj.ac/blog/87) [炫酷反演魔术 - cmd](https://www.luogu.com.cn/blog/command-block/xuan-ku-fan-yan-mo-shu) [反射容斥小记](https://wgyhm.top/2023/12/25/%E5%8F%8D%E5%B0%84%E5%AE%B9%E6%96%A5%E5%B0%8F%E8%AE%B0/) ## Problems [UOJ#424. 【集训队作业2018】count](https://uoj.ac/problem/424) [QOJ# 8147. Math Exam](https://qoj.ac/problem/8147)