摘要： Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321思路：要注意溢出。用以下做法，会溢出。class Solution {public: int reverse(in... 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 阅读全文