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You are given a number of case-sensitive strings of alphabetic characters, find the largest string X, such that either X, or its inverse can be found 阅读全文
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You may have wondered why most extraterrestrial life forms resemble humans, differing by superficial traits such as height, colour, wrinkles, ears, ey 阅读全文
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The repetition number of a string is defined as the maximum number R such that the string can be partitioned into R same consecutive substrings. For e 阅读全文
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题面就不弄了 题意：给你一个串，让你求出补充最少的字符形成的回文串 思路:思路很好想，就是对一个串，找其最后一个字符（第一个也行）和原串的反串的最长公共前缀，这样就求出了该串中的已有最长回文，然后把剩下部分 倒序添加到原串上即可。 也就是我们可以固定一个位置，即使反串的第一个单词（原串最后一个），然 阅读全文
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Given a sequence, {A1, A2, ..., An} which is guaranteed A1 > A2, ..., An, you are to cut it into three sub-sequences and reverse them separately to fo 阅读全文