algorithm & bitwise operation & the best leetcode solutions leetcode 136 single-number the better solution /** * @param {number[]} nums * @return {number} */ var singleNumber = function(nums) { return nums.reduce((sum, i) => sum ^ i, 0); }; //…

Given a linked list, swap every two adjacent nodes and return its head. For example, Given 1->2->3->4, you should return the list as 2->1->4->3. Your algorithm should use only constant space. You may not modify the values in the list, on…

→-→Ln-1→Ln, reorder it to: L→Ln-2→- You must do this in-place without altering the nodes' values. For example, Given {1,2,3,4}, reorder itto {1,4,2,3}. Considering the following steps:  * 1. split such list into two list, first and second, according…

Leetcode Solutions Language: javascript c mysql Last updated: 2019-01-04 https://github.com/nusr/leetcode # Problems Solutions Difficulty Acceptance Paid-Only 001 two-sum c,javascript Easy 39.69% No 002 add-two-numbers javascript Medium 30.01% No 007…

Gas Station There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journ…

Leetcode 简略题解 - 共567题     写在开头:我作为一个老实人,一向非常反感骗赞.收智商税两种行为.前几天看到不止两三位用户说自己辛苦写了干货,结果收藏数是点赞数的三倍有余,感觉自己的无偿付出连认同都得不到,很是失望.明白人都知道这是潜水伸手党的锅.但同时,截止写这段话时,我发现这篇Leetcode简略(得不能再简略的)题解得到了一千多赞,三千多收藏.所以,在我不向任何人做任何广告.收任何费用的前提下,麻烦在收藏的同时,顺手点个赞(对只收藏不点赞的行为表示明确鄙视).如果连点一个…

leetcode solution cracked tutorial problemset https://leetcode.com/problemset/all/ Top Interview Questions https://leetcode.com/problemset/all/?listId=wpwgkgt free solution hack ways leetcode solutions 破解教程 https://github.com/xgqfrms/leetcode/issues/…

Hello Internet ! This blog is to store my algorithm practices. Since Evernote code blocks do not show indent properly, here I am, back to cnblog. Before 12/2017: LeetCode solutions in Python, a few in Java. After 12/2017: Introduction to Algorithm ch…

分享一下最近逛Github看到了一些对于Java面试以及学习有帮助的仓库,这些仓库涉及Java核心知识点整理.Java常见面试题.算法.基础知识点比如网络和操作系统等等. 知识点相关 1.JavaGuide Github地址: https://github.com/Snailclimb/JavaGuidestar: 64.0k•介绍: [Java学习+面试指南] 一份涵盖大部分Java程序员所需要掌握的核心知识. 2.CS-Notes Github 地址:https://github.com/C…

一.https://github.com/zhangdaiscott/jeecg-boot 简介:一款基于代码生成器的JAVA快速开发平台!全新架构前后端分离:SpringBoot 2.x,Ant Design&Vue,Mybatis,Shiro,JWT.强大的代码生成器让前后端代码一键生成,无需写任何代码,绝对是全栈开发福音!! JeecgBoot的宗旨是提高UI能力的同时,降低前后分离的开发成本,JeecgBoot还独创在线开发模式,No代码概念,一系列在线智能开发:在线配置表单.在线配置报…

github上热门深度学习项目 项目名 Stars 描述 TensorFlow 29622 使用数据流图进行可扩展机器学习的计算. Caffe 11799 Caffe:深度学习的快速开放框架. [Neural Style](https://github.com/jcjohnson/neural-style) 10148 火炬实现神经风格算法. Deep Dream 9042 深梦. Keras 7502 适用于Python的深度学习库.Convnets,递归神经网络等等.在Theano和Tens…

I found summary of k Sum problem and solutions in leetcode on the Internet. http://www.sigmainfy.com/blog/summary-of-ksum-problems.html…

leetcode best solutions how to learning algorithms form the leetcode best solutions https://leetcode.com/problems/third-maximum-number/ open details https://leetcode.com/problems/third-maximum-number/submissions click best line bar, support scrollbar…

Wildcard Matching Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any sequence of characters (including the empty sequence). The matching should cover the entire input string (not partia…

Surrounded Regions Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'. A region is captured by flipping all 'O's into 'X's in that surrounded region. For example, X X X X X O O X X X O X X O X X After running your function…

1, 如何不排序而找到最大,次大或者最小值? var int max1, max2, min1; iterate array once: update max1, max2, min1, for example: if(A[i]>max1){max2=max1; max1=A[i];}... 2, 关于括号对称性的问题,如果String包含多种括号类型,需要用Stack.如果String只包含一种括号类型,例如"()",那么只需一个var int leftBrackets来存储'…

Counting Bits Given a non negative integer number num. For every numbers i in the range 0 ≤ i ≤ num calculate the number of 1's in their binary representation and return them as an array. Example:For num = 5 you should return [0,1,1,2,1,2]. Follow up…

Add Digits Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like: 3 + 8 = 11, 1 + 1 = 2. Since 2 has only one digit, return it. Follow up:Could you do it…

因为在开始写这个博客之前,已经刷了100题了,所以现在还是有很多题目没有加进来,为了方便查找哪些没加进来,先列一个表可以比较清楚的查看,也方便给大家查找.如果有哪些题目的链接有错误,请大家留言和谅解,链多了会眼花.  # Title Category Difficulty  697  Degree of an Array  Algorithms  Easy  695  Max Area of Island  Algorithms  Easy  674  Longest Continuous In…

Valid Anagram Given two strings s and t, write a function to determine if t is an anagram of s. For example,s = "anagram", t = "nagaram", return true.s = "rat", t = "car", return false. Note:You may assume the strin…

Implement strStr() Implement strStr(). Returns a pointer to the first occurrence of needle in haystack, or null if needle is not part of haystack. 解法一:暴力解 class Solution { public: int strStr(string haystack, string needle) { int m = haystack.size();…

Lowest Common Ancestor of a Binary Search Tree Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two…

Palindrome Linked List Given a singly linked list, determine if it is a palindrome. Follow up:Could you do it in O(n) time and O(1) space? 解法一: 一次遍历,装入vector,然后再一次遍历判断回文. 时间复杂度O(n),空间复杂度O(n) /** * Definition for singly-linked list. * struct ListNode…

Kth Smallest Element in a BST Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. Follow up:What if the BST is modified (insert/delete…

Contains Duplicate Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 解法一: 排序,然后比较相邻元素是否相同…

Kth Largest Element in an Array Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example,Given [3,2,1,5,6,4] and k = 2, return 5. Note: You may assume k…

Course Schedule There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1] Given the total number of…

Reverse Linked List Reverse a singly linked list. click to show more hints. Hint: A linked list can be reversed either iteratively or recursively. Could you implement both? 解法一:非递归 /** * Definition for singly-linked list. * struct ListNode { * int va…

Number of Islands Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are…

Binary Search Tree Iterator Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. Calling next() will return the next smallest number in the BST. Note: next() and hasNext() should run in…