摘要：Ada, Bertrand and Charles often argue over which TV shows to watch, and to avoid some of their fights they have finally decided to buy a video tape re 阅读全文

摘要：问题 D: Transit Tree Path 问题 D: Transit Tree Path You are given a tree with N vertices.Here, a tree is a kind of graph, and more specifically, a connect 阅读全文

摘要：题目描述 4X概念体系，是指在PC战略游戏中一种相当普及和成熟的系统概念，得名自4个同样以“EX”为开头的英语单词。eXplore（探索）eXpand（拓张与发展）eXploit（经营与开发）eXterminate（征服）——维基百科今次我们着重考虑exploit部分，并将其模型简化：你驾驶着一台带 阅读全文