2016年2月25日
Codeforces Round #343 (Div. 2) E. Famil Door and Roads (树形dp,lca)
摘要： Famil Door’s City map looks like a tree (undirected connected acyclic graph) so other people call it Treeland. There are n intersectio... 阅读全文
posted @ 2016-02-25 20:13 Herumw 阅读(200) 评论(0) 推荐(0)