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摘要： Problem Description There are a lot of trees in an area. A peasant wants to buy a rope to surround all these trees. So at first he must know the minim 阅读全文

摘要： DreamGrid has classmates numbered from to . Some of them are boys and the others are girls. Each classmate has some gems, and more specifically, the - 阅读全文

摘要： Problem Description On a plain of hexagonal grid, we define a step as one move from the current grid to the lower/lower-left/lower-right grid. For exa 阅读全文

摘要： Problem Description Hmz likes to play fireworks, especially when they are put regularly.Now he puts some fireworks in a line. This time he put a trigg 阅读全文

摘要： Problem Description 很多学校流行一种比较的习惯。老师们很喜欢询问，从某某到某某当中，分数最高的是多少。这让很多学生很反感。不管你喜不喜欢，现在需要你做的是，就是按照老师的要求，写一个程序，模拟老师的询问。当然，老师有时候需要更新某位同学的成绩。 Input 本题目包含多组测试，请 阅读全文

摘要： 题目描述 Farmer John is trying to hire contractors to help rearrange his farm, but so far all of them have quit when they saw the complicated sequence of 阅读全文

摘要： Problem Description C国的死对头A国这段时间正在进行军事演习，所以C国间谍头子Derek和他手下Tidy又开始忙乎了。A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务就是要监视这些工兵营地的活动情况。由于采取了某种先进的监测手段，所以每个工兵营地的人数C国都掌握的 阅读全文

摘要： 火车站的列车调度铁轨的结构如下图所示。 Figure 两端分别是一条入口（Entrance）轨道和一条出口（Exit）轨道，它们之间有N条平行的轨道。每趟列车从入口可以选择任意一条轨道进入，最后从出口离开。在图中有9趟列车，在入口处按照{8，4，2，5，3，9，1，6，7}的顺序排队等待进入。如果要 阅读全文

摘要： 题目描述 A low-budget airline is designing a sophisticated algorithm that will assign more desirable seats to passengers who buy tickets earlier. Their ai 阅读全文

摘要： 题目描述 Mårten and Simon enjoy playing the popular board game Seven Wonders, and have just finished a match. It is now time to tally the scores.One of the 阅读全文