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Description Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the pho... 阅读全文
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Description Benny has a spacious farm land to irrigate. The farm land is a rectangle, and is divided into a lot of samll squares. Water pipes ar... 阅读全文
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Description A segment and all segments which are connected with it compose a segment set. The size of a segment set is the number of segments in... 阅读全文
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Description 动物王国中有三类动物A,B,C，这三类动物的食物链构成了有趣的环形。A吃B， B吃C，C吃A。 现有N个动物，以1－N编号。每个动物都是A,B,C中的一种，但是我们并不知道它到底是哪一种。 有人用两种说法对这N个动物所构成的食物链关系进行描述： 第一种说法... 阅读全文
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Description Background Professor Hopper is researching the sexual behavior of a rare species of bugs. He assumes that they feature two differen... 阅读全文
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Description 严重急性呼吸系统综合症( SARS), 一种原因不明的非典型性肺炎,从2003年3月中旬开始被认为是全球威胁。为了减少传播给别人的机会, 最好的策略是隔离可能的患者。 在Not-Spreading-Your-Sickness大学( NSYSU), 有许多学生团体。... 阅读全文
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Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of sev... 阅读全文
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Buy Tickets Time Limit: 4000MS Memory Limit: 65536K Total Submissions: 15869 Accepted: 7905 Description Railway tickets were diffi... 阅读全文
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Description A friend of you is doing research on the Traveling Knight Problem (TKP) where you are to find the shortest closed tour of knight mov... 阅读全文
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Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change ... 阅读全文