1.树状数组
https://blog.csdn.net/bestsort/article/details/80796531
2.矩阵快速幂
https://blog.csdn.net/zhangxiaoduoduo/article/details/81807338
3.图的遍历
https://blog.csdn.net/yue_2018/article/details/89060556
4.tarjan
https://blog.csdn.net/qq_34374664/article/details/77488976
5.dfs有向图边的种类
https://blog.csdn.net/C_ZhangSir/article/details/98238664