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Problem DescriptionEconomic times these days are tough, even in Byteland. To reduce the operating costs, the government of Byteland has decided to opt 阅读全文
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Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to 阅读全文
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Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. 阅读全文
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Problem Description相信大家都听说一个“百岛湖”的地方吧，百岛湖的居民生活在不同的小岛中，当他们想去其他的小岛时都要通过划小船来实现。现在政府决定大力发展百岛湖，发展首先要解决的问题当然是交通问题，政府决定实现百岛湖的全畅通！经过考察小组RPRush对百岛湖的情况充分了解后，决定在 阅读全文
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Problem 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 dir 阅读全文