5. Longest Palindromic Substring - Unsolved

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[string]Longest Palindromic Substring

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Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 做这道题之前要先了解什么是回文子串.回文串通俗的解释是,分别从字符串两端开始遍历,得到的结果相同,如"abba",从两端的遍历结果都是:&q

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