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B. Nikita and stringOne day Nikita found the string containing letters "a" and "b" only. Nikita thinks that string is beautiful if it can be cut into 阅读全文
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Problem DescriptionThe input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000. This n 阅读全文
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C. White SheetThere is a white sheet of paper lying on a rectangle table. The sheet is a rectangle with its sides parallel to the sides of the table. 阅读全文