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6. ZigZag Conversion 题面 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this 阅读全文
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11. Container With Most Water 题面 Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines 阅读全文
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5. Longest Palindromic Substring 题面 Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000 阅读全文
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3. Longest Substring Without Repeating Characters 题面 Given a string, find the length of the longest substring without repeating characters. 给定字符串,找到最长 阅读全文