摘要：
Determine whether an integer is a palindrome. Do this without extra space.这题又是Vaguely stated。点开Spoiler，问你负数如何处理？我哪知道你怎样才判对。去discuss看看，才发现负数一律不算palindr... 阅读全文
摘要：
Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below and ... 阅读全文
摘要：
Reverse digits of an integer.Example1:x = 123, return 321Example2:x = -123, return -321逆转一个整数。题目意思很简单，但是有许多需要注意的点。例如，溢出。题目在Spoiler里面说了溢出应该返回0。但是不看Spoi... 阅读全文
摘要：
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 fo... 阅读全文
摘要：
Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest pa... 阅读全文
摘要：
There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be ... 阅读全文