9255: Too Rich 时间限制: 1 Sec 内存限制: 128 MB 提交: 100 解决: 22 [提交] [状态] [讨论版] [命题人:admin] 题目描述 You are a rich person, and you think your wallet is too heavy and full now. So you want to give me some mon
9262: Partial Tree 时间限制: 1 Sec 内存限制: 128 MB 提交: 70 解决: 29 [提交] [状态] [讨论版] [命题人:admin] 题目描述 In mathematics, and more specifically in graph theory, a tree is an undirected graph in which any two no