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Problem DescriptionA tree is a well-known data structure that is either empty (null, void, nothing) or is ... 阅读全文
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Problem Descriptionice_cream's world is a rich country, it has many fertile lands. Today, the queen of ice... 阅读全文
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Problem Description上次Gardon的迷宫城堡小希玩了很久（见Problem B），现在她也想设计一个迷宫让Gardon来走。但是她设计迷宫的思路不一样，首先她认为所有的通道都应该是双向连通的，... 阅读全文
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Problem DescriptionMr Wang wants some boys to help him with a project. Because the project is rather compl... 阅读全文
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Problem DescriptionToday is Ignatius' birthday. He invites a lot of friends. Now it's dinner time. Ignatiu... 阅读全文
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DescriptionSevere acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recog... 阅读全文
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Problem DescriptionAs we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives R... 阅读全文
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Problem DescriptionGive you three sequences of numbers A, B, C, then we give you a number X. Now you need ... 阅读全文
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Problem DescriptionInhabitants of the Wonderland have decided to hold a regional programming contest. The ... 阅读全文
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Problem DescriptionNow,given the equation 8*x^4 + 7*x^3 + 2*x^2 + 3*x + 6 == Y,can you find its solution b... 阅读全文