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摘要： D. Arpa's weak amphitheater and Mehrdad's valuable Hoses D. Arpa's weak amphitheater and Mehrdad's valuable Hoses Just to remind, girls in Arpa's land 阅读全文

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摘要： 题意：知道矩阵的前i行之和，和前j列之和（任意i和j都可以）。求这个矩阵。每个格子中的元素必须在1~20之间。矩阵大小上限20*20 阅读全文

摘要： A Plug for UNIX You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an 阅读全文

摘要： Dining Description Cows are such finicky eaters. Each cow has a preference for certain foods and drinks, and she will consume no others. Farmer John h 阅读全文

摘要： The Maximum Number of Strong Kings Description A tournament can be represented by a complete graph in which each vertex denotes a player and a directe 阅读全文

摘要： Ombrophobic Bovines Description FJ's cows really hate getting wet so much that the mere thought of getting caught in the rain makes them shake in thei 阅读全文

摘要： Sightseeing tour Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every cor 阅读全文

摘要： PIGS Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. 阅读全文

摘要： Detachment Problem Description In a highly developed alien society, the habitats are almost infinite dimensional space.In the history of this planet,t 阅读全文