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自从Lele开发了Rating系统，他的Tetris事业更是如虎添翼，不久他遍把这个游戏推向了全球。为了更好的符合那些爱好者的喜好，Lele又想了一个新点子：他将制作一个全球Tetris高手排行榜，定时更新，名堂要比福布斯富豪榜还响。关于如何排名，这个不用说都知道是根据Rating从高到低来排，如果 阅读全文
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A certain local trucking company would like to transport some goods on a cargo truck from one place to another. It is desirable to transport as much g 阅读全文
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Order is an important concept in mathematics and in computer science. For example, Zorn's Lemma states: ``a partially ordered set in which every chain 阅读全文
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A catenym is a pair of words separated by a period such that the last letter of the first word is the same as the last letter of the second. For examp 阅读全文