随笔分类 -  POI

[POI2014] HOT-Hotels 加强版
摘要：[POI2014] HOT-Hotels 题面翻译 给定一棵树，在树上选 \(3\) 个点，要求两两距离相等，求方案数。 题目描述 There are \(n\) towns in Byteotia, connected with only \(n-1\) roads. Each road dire 阅读全文
posted @ 2023-10-01 12:00 灰鲭鲨 阅读(51) 评论(0) 推荐(0)