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1009 Product of Polynomials This time, you are supposed to find A×B where A and B are two polynomials. Input Specification: Each input file contains o 阅读全文
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Elevator The highest building in our city has only one elevator. A request list is made up with Npositive numbers. The numbers denote at which floors 阅读全文
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Maximum Subsequence Sum Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+1, ..., 阅读全文
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Sign In and Sign Out At the beginning of every day, the first person who signs in the computer room will unlock the door, and the last one who signs o 阅读全文