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A Simple ProblemProblem DescriptionThere's one row of buttons lying on onmylove's laptop keyboard, which are used to input the numbers,just as shown i... 阅读全文
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B-numberProblem DescriptionA wqb-number, or B-number for short, is a non-negative integer whose decimal form contains the sub- string "13" and can be ... 阅读全文
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OulipoTime Limit:1000MSMemory Limit:65536KTotal Submissions:21682Accepted:8648DescriptionThe French author Georges Perec (1936–1982) once wrote a book... 阅读全文