leetcode array|442. Find All Duplicates in an Array

Given an array of integers, 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear twice in this array. Could you do it without extra space and in O(n) runtime?   Example: Input: [4,3,2,7,8,2,3,1] Output: [2,3] This topic is very similar to the previous p ...

Posted on Mon, 04 Feb 2019 10:24:16 -0800 by feliperal

C# IComparable interface, IComparer interface, C ompareTo (Object x) method, Compare() method

I believe everyone will encounter the sorting of the elements in the list. How to solve the sorting problem? We usually use the way of implementing IComparable interface or IComparer interface to sort. I will take a simple program as an example to explain how to sort. Let's first look at the status of using Sort sort list s di ...

Posted on Mon, 04 Feb 2019 10:00:16 -0800 by Dave100

vue+axios (front end) node+express (back end) uploads pictures using form data

Prerequisite: In ordinary HTML, we upload files mostly using the entire form of direct submit in the label. Nowadays, we can't use labels. How can we just upload files? The problems to be solved in order to meet the requirements are as follows: 1. How to get files in js logic? 2. In what form? 3. How does the background rece ...

Posted on Mon, 04 Feb 2019 09:12:17 -0800 by bluebyyou

MTK platform captures system resource information (CPU/GPU/fps/temperature/GPU limit power/CPU limit power)

The contrast platform is the rubbish X25 platform used a few days ago. MTK should have a lot of information, especially X series, P series are similar. First of all, we need to know where some private information of MTK platform is. For example, fps,gpu info, etc. #define SYSTEM_FPS_PATH "/proc/fps_tm/fps_count" #define SYSTE ...

Posted on Mon, 04 Feb 2019 08:39:16 -0800 by Rottingham

North American Invitational Programming Contest 2018 (NAIPC2018)(solve4/11)

Clais Boss Questions: https://www.cnblogs.com/clrs97/p/8730429.html Topic link: https://nanti.jisuanke.com/?kw=The%20North%20American%20Invitational%20Programming%20Contest%202018 C Title: Significance: Give you a string of 01 to show the brightness of the bulb, 1 is on or off. Ask how long you can make all the lights on. It ...

Posted on Mon, 04 Feb 2019 08:21:18 -0800 by luke_barnes

[Nowcoder 2018 ACM Multicultural Game 8 H] Playing games

Main idea of the title: The original topic can be converted into a sequence aiai with a length of n. Ask how many numbers you can choose to make XOR zero at most. (n,ai < 5 105)(n,ai < 5 105) Topic train of thought: Considering that the XOR of the original sequence is sum, the answer is n minus it if the minimum number ...

Posted on Mon, 04 Feb 2019 07:27:16 -0800 by Someone789

「LYOI2018 Summer」Hzy's Rabbit Candy

「LYOI2018 Summer」Hzy's Rabbit Candy     Title Description Hz y and her m rabbit play on a directed acyclic graph with n dots and m m m edges. To make the rabbits happy, Hz y brought some sugar. Hz y can start at any point and end at any point. On the way, whenever Hz y passes by a point I I i, she will pick up aia_ia_i. Wheneve ...

Posted on Mon, 04 Feb 2019 05:24:15 -0800 by mc2007

Initial knowledge of Vue - (the combination of JS animation and Velocity.js in Vue)

The Combination of JS Animation in Vue and Velocity.js Add animation through JS hook (Entry) <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> Vue Medium JS Animation and Velocity.js Combination</title> <script src = './vue.js'></script> </hea ...

Posted on Mon, 04 Feb 2019 05:21:16 -0800 by DevilsAdvocate

[bzoj4756][Usaco2017 Jan]Promotion Counting -- Introduction to Line Segment Tree Merging

Main idea of the title: n cows form a tree-like company, each cow has a capacity value pi, and cow number 1 is the root of the tree. For each cow, there are several abilities in its subtree that are larger than it. Train of thought: The weighted line segment tree is used to query the number of nodes larger than it in the ...

Posted on Mon, 04 Feb 2019 04:57:15 -0800 by rathlon

Alex and broken contest (string) CodeForces - 877A

One day Alex was creating a contest about his friends, but accidentally deleted it. Fortunately, all the problems were saved, but now he needs to find them among other problems. But there are too many problems, to do it manually. Alex asks you to write a program, which will determine if a problem is from this contest by its na ...

Posted on Mon, 04 Feb 2019 04:54:16 -0800 by Sinister747