2018年5月3日
Tree and Queries CodeForces - 375D
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 @ 2018-05-03 15:58 天之道，利而不害 阅读(441) 评论(0) 推荐(0) 编辑