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Problem DescriptionIn Vivid’s school, there is a strange class(SC). In SC, the students’ names are very strange. They are in the same format:anbncn(a,... 阅读全文
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Problem DescriptionLong long ago, there is a gunner whose name is Jack. He likes to go hunting very much. One day he go to the grove. There arenbirds ... 阅读全文
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DescriptionThe little cat is so famous, that many couples tramp over hill and dale to Byteland, and asked the little cat to give names to their newly-... 阅读全文
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DescriptionThe French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter'e'. He was a member of the Oulipo group. ... 阅读全文