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问题描述 ~~~ Example1: x = 123, return 321 Example2: x = 123, return 321 ~~~ 原题链接: https://leetcode.com/problems/reverse integer/ 解决方案 ~~~ public int reve 阅读全文
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Given a string, find the length of the longest substring without repeating characters. Examples ~~~ Given "abcabcbb", the answer is "abc", which the l 阅读全文
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The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font 阅读全文
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问题描述 Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see b 阅读全文