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Description A tree is a well-known data structure that is either empty (null, void, nothing) or is a set of one or more nodes connected by directed ed 阅读全文
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1.2.3 Name That Number 命名那个数字 Description 在威斯康辛州牛大农场经营者之中,都习惯于请会计部门用连续数字给母牛打上烙印。但是,母牛用手机时并没感到这个系统的便利,它们更喜欢用它们喜欢的名字来呼叫它们的同伴,而不是用像这个的语句"C'mon, #4734, ge 阅读全文
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Since Sonya is interested in robotics too, she decided to construct robots that will read and recognize numbers. Sonya has drawn nn numbers in a row, 阅读全文
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Slava plays his favorite game "Peace Lightning". Now he is flying a bomber on a very specific map. Formally, map is a checkered field of size 1 × n, t 阅读全文
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Sonya decided to organize an exhibition of flowers. Since the girl likes only roses and lilies, she decided that only these two kinds of flowers shoul 阅读全文
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Allen wants to enter a fan zone that occupies a round square and has nn entrances. There already is a queue of aiai people in front of the ii-th entra 阅读全文