摘要： Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. The matching should cover the entire  阅读全文

摘要： Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Example 2: Example 3: 阅读全文

摘要： 这题无聊到我都懒得把题目复制过来。。 造轮子，实现atoi函数。 没什么技术含量，就是考虑各种边界情况。 阅读全文

摘要： Given a 32-bit signed integer, reverse digits of an integer. Example 1: Example 2: Example 3: Note:Assume we are dealing with an environment which cou 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

摘要： Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example 1: Example 2: 查找最长的回文子串，这道 阅读全文

摘要： There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity sh 阅读全文

摘要： Given a string, find the length of the longest substring without repeating characters. Example 1: Example 2: Input: "bbbbb" Output: 1 Explanation: The 阅读全文

摘要： 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 contai 阅读全文

摘要： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex 阅读全文