Android 数据存储(二)-SP VS DataStore VS MMKV
一、SharedPreferences
不同于文件的存储方式，如果要保存的键值集合相对较小，则应使用SharedReferences API。SharedReferences对象指向一个包含键值对的文件，并提供简单的读写方法。
本文从SharedReferences开始逐步引入Preference、MMKV。
[UPC | 山东省赛] The Largest SCC | Tarjan强连通分量瞎搞 + 状态还原
题目描述
Consider a directed graph with N (1 <= N <= 1000) vertices and M (0 <=M <= 20000) edges. The edges are numbered from 1 to M and the vertices are numbered from 1 to N. Now I will make ONE edge bidirectional, and you are to tell me the number of vertices of the largest strong connected components
