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印度哥的视频讲的很好:https://www.youtube.com/watch?v=sYcOK51hl-A 阅读全文
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Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231- 1.For example,123 -> "One Hundred T... 阅读全文
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Given a singly linked list, determine if it is a palindrome.Follow up:Could you do it in O(n) time and O(1) space? 1 /** 2 * Definition for singly-li... 阅读全文