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There are N points in 3D-space which make up a 3D-Convex hull*. How many faces does the 3D-convexhull have? It is guaranteed that all the points are n 阅读全文
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Farmer John has decided to reward his cows for their hard work by taking them on a tour of the big city! The cows must decide how best to spend their 阅读全文
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Palace Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 404 Accepted Submission(s): 104 Problem 阅读全文
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Quoit Design Problem DescriptionHave you ever played quoit in a playground? Quoit is a game in which flat rings are pitched at some toys, with all the 阅读全文
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In a certain course, you take n tests. If you get ai out of bi questions correct on test i, your cumulative average is defined to be . Given your test 阅读全文
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序列变换 给定序列A={A1,A2,...,An}A={A1,A2,...,An}, 要求改变序列A中的某些元素，形成一个严格单调的序列B（严格单调的定义为：Bi<Bi+1,1≤i<NBi<Bi+1,1≤i<N）。 我们定义从序列A到序列B变换的代价为cost(A,B)=max(|Ai−Bi|)(1 阅读全文
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In a postorder traversal of the vertices of T, we visit the vertices of T1 in postorder, then the vertices of T2 in postorder and finally we visit r.N 阅读全文
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有N个比赛队（1<=N<=500），编号依次为1，2，3，。。。。，N进行比赛，比赛结束后，裁判委员会要将所有参赛队伍从前往后依次排名，但现在裁判委员会不能直接获得每个队的比赛成绩，只知道每场比赛的结果，即P1赢P2，用P1，P2表示，排名时P1在P2之前。现在请你编程序确定排名。 Input 输入 阅读全文
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1、继承：可以基于某个父类对对象的定义加以扩展，而制定出一个新的子类定义。子类可以继承父类原来的某些定义；也可以增加原来的父类所没有的定义；也可以重写父类中的某些特性。 2、在java中，所有的类都直接或间接继承了java.lang.Object类。 3、扩展（Extends）父类。Java中使用e 阅读全文
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Farmer John is an astounding accounting wizard and has realized he might run out of money to run the farm. He has already calculated and recorded the 阅读全文