摘要: 今天学了重链剖分,正好可以补题 描述 You are given a tree with N nodes. The tree’s nodes are numbered 1 through N and its edges are numbered 1 through N − 1. Each edge 阅读全文
posted @ 2024-03-26 01:06 holy_crap 阅读(19) 评论(1) 推荐(1) 编辑