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B. Robin Hood time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We all know the impressive 阅读全文
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D. Pair of Numbers time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Simon has an array a1 阅读全文
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Boxes Boxes Boxes There are N There are N boxes, indexed by a number from 1 to N . Each box may (or not may not) be put into other boxes. These boxes 阅读全文