isomebody的专栏

一、描述：You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and retu

问题描述：Reverse digits of an integer.Example1: x = 123, return 321 Example2: x = -123, return -321click to show spoilers.Note: The input is assumed to be a 32-bit signed integer. Your function should re

一、问题描述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 for better legibility)P A H NA P L S I

一、问题描述Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000.Example:Input: "babad"Output: "bab"Note: "aba" is also a valid answer.Example:In

一. 题目描述：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 below and ask yourself what are the possible input