摘要： 看到shell没几道题，那就把shell先刷了吧 Write a bash script to calculate the frequency of each word in a text file words.txt. For simplicity sake, you may assume: wo 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: Example: k代表这一轮要比较的字串都是长度 阅读全文

摘要： 图样图森破 今天发现LeetCode有solution，而且，点开solution之后，这时点击屏幕大概右上角view in article，里面有具体详解。java或python或。。的代码 虽然不一定就好理解，但是实在不会做的时候，没有思路的时候可以看一哈 阅读全文

摘要： 题源： https://leetcode.com/problemset/all/ 第四题 There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sort 阅读全文

摘要： Given a string, find the length of the longest substring without repeating characters. 找出字串S中最长无重复子串的长度。 Examples: Given "abcabcbb", the answer is "ab 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