todo-list

补题

• 生成函数 http://vj.bit-studio.cn/contest/222573
• The 2017 China Collegiate Programming Contest, Qinhuangdao Site http://vj.bit-studio.cn/contest/226367
• 2014-2015 ACM-ICPC Southeastern European Regional Programming Contest (SEERC 2014) http://codeforces.com/gym/101470
• 后缀自动机总结 我怎么那套题还没补完阿？？QAQ