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题目链接 题目 You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subsequence aij such that t 阅读全文
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题目链接 题目 Define the distance between two strings of the same length as the numbers of the positions where the characters differ in these two strings. I 阅读全文
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题目链接 题目 Your company has just constructed a new skyscraper, but you just noticed a terrible problem: there is only space to put one game room on each 阅读全文