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题目描述: In some country there are exactly n cities and m bidirectional roads connecting the cities. Cities are numbered with integers from 1 to n. If ci 阅读全文
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题目描述: Vasiliy has an exam period which will continue for n days. He has to pass exams on m subjects. Subjects are numbered from 1 to m. About every da 阅读全文
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题目描述: On his trip to Luxor and Aswan, Sagheer went to a Nubian market to buy some souvenirs for his friends and relatives. The market has some strange 阅读全文
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题目描述:One day n friends gathered together to play "Mafia". During each round of the game some player must be the supervisor and other n - 1 people take 阅读全文