这是一道面试亚马逊时的题目,要求Time O(n). 我刚开始想的是算出所有的数的总product,再去除以对应位置的元素,但这种做法的问题是若该位置为0,就会报错. 到网上搜了下,才知道,原来有这种做法. e.g. arr = {0,1,2,3},生成两个array: upArr = {1,arr[0], arr[0]*arr[1],arr[0]*arr[1]*arr[2]} downArr = {arr[0]*arr[1]*arr[2],arr[1]*arr[2], arr[2],1} 最后…

參考自: https://love2dev.com/blog/javascript-remove-from-array/ 1. Removing Elements from End of Array var ar = [1, 2, 3, 4, 5, 6]; ar.length = 4; // set length to remove elements console.log( ar ); // [1, 2, 3, 4] var ar = [1, 2, 3, 4, 5, 6]; ar.pop();…

句法: M = max(A) M = max(A,[],dim) [M,I] = max(___) C = max(A,B) ___ = max(___,nanflag)   描述: M=max(A)返回集合A中最大的元素. 如果A是一个向量,则max(A)返回的是集合A的一个元素. 如果A是一个矩阵,则max(A)返回的是包含每列最大值的行向量. 如果A是一个多维数组,则max(A)沿着第一个数组维度运行,其大小不等于1,将元素作为向量进行处理.该维度变为1,而所有其他维度的大小保持不变.如果…

最近工作中,因为某某某某原因,需要用到Node.js  . 发现在很多方面和python很像,比如generator / yield ,比如模块的使用方式,比如http模块. 先安装个环境,windows没什么难度,下载个安装包装一下就行,主要看一下centos的 并且修改了npm源为淘宝源,主要是下载速度快.并且安装了forever组件,作为服务器的 node 服务器守护程序. // centos6.5下安装 // 官网下载: https://nodejs.org/en/download/ /…

准备运行环境: 1)Portable Basemap Server(PBS)用于创建地图服务 官网网址:http://geopbs.codeplex.com/ 如何创建底图服务?操作步骤如下: 如果启动的时候端口冲突的话,打开PortableBasemapServer.exe.config配置端口号. 打开PortableBasemapServer.exe[以管理员身份运行] 下载底图:(mbtiles格式的) 选择区域进行下载即可: 配置启动地图服务:点击Browse选中lanzhou.mbt…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements.    Your algorithm's time complexity must be…

原题链接在这里:https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/ 题目: Given a non-empty integer array, find the minimum number of moves required to make all array elements equal, where a move is incrementing a selected element by 1 or d…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. 其实最简单的就是想到就是用一个小顶堆实现,如果堆中元素个数小于K,则插入元素,如果大于K,则和堆顶比较,如果大于堆顶,则弹出堆顶,插入新元素. 自己实现红黑树有点难,好在C++ STL容器中,map,set和priority_queue都…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. public class Solution { //桶排序 public List<In…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must be bet…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. 分析: http://blog.csdn.net/itismelzp/article/details/51451374 bucket sort, 出现次数作为被sort的对象. public class Solution { public…

Explain "chaining". Chaining allows us to run multiple jQuery methods (on the same element) within a single statement.like this: $(selector).doA().doB().doC() Explain "deferreds". The Deferred object, introduced in jQuery 1.5, is a cha…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: 347. Top K Frequent ElementsYou may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's…

Description You are given two arrays of integers a and b. For each element of the second array bj you should find the number of elements in array athat are less than or equal to the value bj. Input The first line contains two integers n, m (1 ≤ n, m …

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must be bet…

我们来看看rulelist,它是整个ABNF文法的入口,就是说一个ABNF文法就是一个规则列表rulelist.一个rulelist由若干个rule规则组成,每个rule由规则名rulename.定义方式define-as和元素elements构成. 先来看解析代码: /* This file is one of the component a Context-free Grammar Parser Generator, which accept a piece of text as the i…

B. Queries about less or equal elements time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given two arrays of integers a and b. For each element of the second array bj you should fin…

Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ number of unique ele…

版权声明: 本文为博主Bravo Yeung(知乎UserName同名)的原创文章,欲转载请先私信获博主允许,转载时请附上网址 http://blog.csdn.net/lzuacm. C#版 - Leetcode 347. Top K Frequent Elements - 题解 在线提交: https://leetcode.com/problems/top-k-frequent-elements/ Description Given a non-empty array of integers…

203题是在链表中删除一个固定的值,83题是在链表中删除重复的数值,但要保留一个:82也是删除重复的数值,但重复的都删除,不保留. 比如[1.2.2.3],83题要求的结果是[1.2.3],82题要求的结果是[1,3]. 这种题用递归去做比较方便思考,特别是这种重复的数值.递归就是只遍历当前的节点的情况,之前的不用管,之后的以当前节点为出发点思考问题. 203. Remove Linked List Elements class Solution { public: ListNode* remo…

［抄题］: Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must…

Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ number of unique ele…

You are given two arrays of integers a and b. For each element of the second arraybj you should find the number of elements in array a that are less than or equal to the value bj. Input The first line contains two integers n, m (1 ≤ n, m ≤ 2·105) — t…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must be bet…

本文转自:http://msdn.microsoft.com/zh-cn/magazine/cc280502(en-us,SQL.100).aspx SQL statements and stored procedures frequently use input parameters, output parameters, and return codes. In Integration Services, the Execute SQL task supports the Input, Ou…

题目描述: Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must…

传送门: http://codeforces.com/problemset/problem/600/B Queries about less or equal elements time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given two arrays of integers a and b. For e…

题意:移除链表中元素值为val的全部元素. 思路:算法复杂度肯定是O(n),那么就在追求更少代码和更少额外操作.我做不出来. /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public: ListNode* removeElemen…

Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ number of unique ele…

Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] Note: You may assume k is always valid, 1 ≤ k ≤ number of unique ele…