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题目: 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 lo 阅读全文
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题目: Given a sorted integer array where the range of elements are [0, 99] inclusive, return its missing ranges.For example, given [0, 1, 3, 50, 75], re 阅读全文
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题目: Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letter 阅读全文