2018年4月27日
CodeForces 376F Tree and Queries(假·树上莫队)
摘要： You have a rooted tree consisting of n vertices. Each vertex of the tree has some color. We will assume that the tree vertices are numbered by integer 阅读全文
posted @ 2018-04-27 21:02 Styx-ferryman 阅读(225) 评论(0) 推荐(0) 编辑