2019年5月20日
2018 ICPC青岛网络赛 B. Red Black Tree(倍增lca)
摘要： BaoBao has just found a rooted tree with n vertices and (n-1) weighted edges in his backyard. Among the vertices, m of them are red, while the others 阅读全文
posted @ 2019-05-20 23:58 进击的黑仔 阅读(320) 评论(0) 推荐(0) 编辑