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转自：http://blog.sina.com.cn/s/blog_8b5a0d0001011779.html 三角函数：(所有参数必须为弧度) 1.acos 函数申明：acos (double x); 用途:用来返回给定的 X 的反余弦函数。 2.asin 函数申明：asin (double x) 阅读全文
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Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10504 Accepted Submission(s): 3701 Problem Descri 阅读全文
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Description 阿狸喜欢收藏各种稀奇古怪的东西，最近他淘到一台老式的打字机。打字机上只有28个按键，分别印有26个小写英文字母和'B'、'P'两个字母。经阿狸研究发现，这个打字机是这样工作的：l 输入小写字母，打字机的一个凹槽中会加入这个字母(这个字母加在凹槽的最后)。l 按一下印有'B'的 阅读全文
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Problem Description In the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bring this feature 阅读全文
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2016-06-13 13:13:42 阅读全文
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Description You’ve just built a circuit board for your new robot, and now you need to power it. Your robot circuit consists of a number of electrical 阅读全文
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Description In a country there are n cities connected by m one way roads. You can paint any of these roads. To paint a road it costs d unit of money w 阅读全文
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Description A tournament can be represented by a complete graph in which each vertex denotes a player and a directed edge is from vertex x to vertex y 阅读全文
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Description A prominent microprocessor company has enlisted your help to lay out some interchangeable components(widgets) on some of their computer ch 阅读全文
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Description Presumably, you all have known the question of stable marriage match. A girl will choose a boy; it is similar as the game of playing house 阅读全文
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Description The mobile network market in country XYZ used to be dominated by two large corporations, XYZTelecom and XYZ Mobile. The central government 阅读全文
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Description You are appointed director of a famous concert hall, to save it from bankruptcy. The hall is verypopular, and receives many requests to us 阅读全文
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Description There are N cities, and M directed roads connecting them. Now you want to transport K units ofgoods from city 1 to city N. There are many 阅读全文
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Description We are supposed to make a budget proposal for this multi-site competition. The budget proposal is a matrix where the rows represent differ 阅读全文
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Problem Description 欢迎来到珠海！由于土地资源越来越紧张，使得许多海滨城市都只能依靠填海来扩展市区以求发展。作为Z市的决策人，在仔细观察了Z市地图之后，你准备通过填充某些海域来扩展Z市的海岸线到最长，来吸引更多的游客前来旅游度假。为了简化问题，假设地图为一个N*M的格子，其中一些 阅读全文
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Description 给定一棵有n个节点的无根树和m个操作，操作有2类： 1、将节点a到节点b路径上所有点都染成颜色c； 2、询问节点a到节点b路径上的颜色段数量（连续相同颜色被认为是同一段），如“112221”由3段组成：“11”、“222”和“1”。 请你写一个程序依次完成这m个操作。 给定一 阅读全文
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Description 一棵树上有n个节点，编号分别为1到n，每个节点都有一个权值w。我们将以下面的形式来要求你对这棵树完成一些操作： I. CHANGE u t : 把结点u的权值改为t II. QMAX u v: 询问从点u到点v的路径上的节点的最大权值 III. QSUM u v: 询问从点u 阅读全文
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Description Write a program that takes as input a rooted tree and a list of pairs of vertices. For each pair (u,v) the program determines the closest 阅读全文
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Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In the figure, each node is l 阅读全文
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Description You are given a tree with N nodes. The tree’s nodes are numbered 1 through N and its edges are numbered 1 throughN − 1. Each edge is assoc 阅读全文