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畅通工程 Problem Description 某省调查城镇交通状况，得到现有城镇道路统计表，表中列出了每条道路直接连通的城镇。省政府“畅通工程”的目标是使全省任何两个城镇间都可以实现交通（但不一定有直接的道路相连，只要互相间接通过道路可达即可）。问最少还需要建设多少条道路？ Input 测试输入 阅读全文
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Eddy's picture Problem Description Eddy begins to like painting pictures recently ,he is sure of himself to become a painter.Every day Eddy draws pict 阅读全文
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Constructing Roads Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villa 阅读全文
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Buy the Ticket Problem Description The \\\\\\\"Harry Potter and the Goblet of Fire\\\\\\\" will be on show in the next few days. As a crazy fan of Har 阅读全文
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C. Arpa's loud Owf and Mehrdad's evil plan time limit per test 1 second memory limit per test 256 megabytes input standard input output standard outpu 阅读全文
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B. Arpa’s obvious problem and Mehrdad’s terrible solution time limit per test 1 second memory limit per test 256 megabytes input standard input output 阅读全文