摘要： Tree http://poj.org/problem?id=3237 Time Limit: 5000MS Memory Limit: 131072K Total Submissions: 12268 Accepted: 3159 Description You are given a tree 阅读全文

摘要： Jiu Yuan Wants to Eat https://nanti.jisuanke.com/t/31714 You ye Jiu yuan is the daughter of the Great GOD Emancipator. And when she becomes an adult, 阅读全文

摘要： 旅行 https://www.luogu.org/problemnew/show/P3313 题目描述 S国有N个城市，编号从1到N。城市间用N-1条双向道路连接，满足从一个城市出发可以到达其它所有城市。每个城市信仰不同的宗教，如飞天面条神教、隐形独角兽教、绝地教都是常见的信仰。 为了方便，我们用不 阅读全文