problem was equivalent to finding the topological order in a directed graph. If a cycle exists, no topological ordering exists and therefore it'll be impossible to take all courses.
Topological Sort via dfs-a great video tutorial (minutes) on Coursera explaining the basic concepts of topological so Rt.
Topological sort could also is done via BFS.
Links: http://leetcode.com/problems/course-schedule-ii/ExercisesLike course
ArticleDirectory
Life schedule
How to find out the reason for wasting time
Everyone needs time management
How do you use the money if you have to pay 86400 yuan a day to access your bank account? Is there such a good thing in the world? Yes, you really have such an account, that is, "Time ". Every person has a new 86400-second billing every day.Looks rich? If a person's life is 60 years old, it will take 20 years to go to bed, ea
Task scheduletime limit: 2000/1000 MS (Java/others) memory limit: 65536/32768 K (Java/Others)
Total submission (s): 4003 accepted submission (s): 1347
Problem descriptionour geometry princess XMM has stoped her study in computational geometry to concentrate on her newly opened factory. her factory has introduced m new machines in order to process the coming n tasks. for the I-th task, the factory has to start processing it at or after day Si, process it for Pi days, and finish the task before
How to schedule a job in Oracle --
... Currently, popular mainstream databases all have this function, most representative of which are Microsoft SQL Server 7.0, Oracle8i/9i, etc. However, to make the job work, we still need to configure it. All these configurations have GUI operations. This article introduces how to configure a job through the command line in Oracle9i ......
As we all know, generally, the operating system provides a method to regul
The company began to follow the regular path, so everything had to have a flowchart. To prepare a software development schedule, we had to strictly follow the schedule. The previous progress was basically only the actual work content, not subdivided into each stage
I found a good decision on the Internet, and then modified it based on actual needs. The record is shown as follows:
I recently read "project management art". Get a very important message: schedule is one of the important factors for project success!The schedule provides a form of contract between every person on a team or in an organization, confirming what each person is going to deliver over the next week, month, or year.This includes three purposes of Schedule:1. A form of
(1) Establish a preliminary engineering Network Diagram
(2) Calculate the earliest occurrence time (EET) and the latest occurrence time (LET) of each event, and mark it in the project network diagram.
(3) determine and mark the key paths.
(4) Calculate the maneuver time of non-critical jobs and mark them in the engineering network diagram.
(5) use the mobile time to schedule the progress with time and resource constraints.
When arranging the
With the help of computers, the course schedule that was previously completed in two days can be completed within two hours. The teachers can relax after learning this trick.
At the beginning of each school year, the leaders in charge of teaching affairs are most afraid of arranging courses. They repeatedly thought about the course before and after, and made several adjustments, so they could blow up their heads to a slightly larger school, it may tak
In Node.js, I use Node-schedule to perform timed tasks. Cron-style's time format is not intuitive for beginners, so it is generally used in this way: for example, the official example of 42 minutes per hour to perform the task
Copy Code code as follows:
var schedule = require (' Node-schedule ');
var rule = new s
Daily laravel-20160712 | Schedule
events[] = $event = new CallbackEvent($callback, $parameters); return $event; }// get a instance about the event function ,and add it to the events array. /** * Add a new Artisan command event to the schedule. * * @param string $command * @param array $parameters * @return \Illuminate\Console\Scheduling\Event */ public function
all about.How do I use Fluentscheduler?I recommend you go to the author's Github to see the source code or example, address: Https://github.com/fluentscheduler/FluentSchedulerOf course, here I use the author's example to do a demonstration and translation, to ensure that anyone can read.First, install the FluentScheduler packageOpen the package Management Console and enter Install-Package FluentScheduler . Step: Status bar Selection Tool-Library Package Manager-Package management console , such
When it comes to scheduling scheduled tasks, I believe a lot of people will thinkCeleryCelery, or just write a script and plug it into the crontab. However, a small timing script, to use celery words too "heavy".So, I found a lightweight scheduled Task Scheduler library: schedule. The installation of the library or the simplest pip install schedule is easy to understand. We look at the simplest chestnuts:Im
How Linux is scheduled in many processes, this involves the Linux process scheduling concept, the Linux kernel in the schedule () function to determine whether the process to switch, if you want to switch, switch to which process and so on.
The timing of Linux process scheduling is mainly as follows:
1, the process of state transition time: Process termination, process sleep;
2. The time slice of the current process is run out (current->counter=0);
3.
Sometimes it may help if you need to do something in the morning, depending on your business needs, and I'm looking at this recently, and welcome to discuss it together.
GitHub Address: Https://github.com/mattpat/node-schedule
First, installation
Copy Code code as follows:
NPM Install Node-schedule
Ii. determination of time, for example: November 21, 2012, 5:30
Copy Code code as
This article mainly introduces the detailed Python scheduling framework Apscheduler use, small series feel very good, and now share to everyone, but also for everyone to do a reference. Let's take a look at it with a little knitting.
Recently in the study of Python scheduling framework Apscheduler use of the road, then today is a study notes it!
# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 s
The parent process executes WAIT4 and calls schedule to switch to the child process:WAIT4 (child, NULL, 0, NULL);Like any other system call, the WAIT4 () entry in the kernel is SYS_WAIT4 (), and the code is as follows:Asmlinkage Long SYS_WAIT4 (pid_t pid,unsigned int * stat_addr, int options, struct rusage * ru)//pid is the process number of the child process {int flag, RETV Al;declare_waitqueue (wait, current); struct task_struct *tsk;if (Options ~
How do you add a schedule to your mindmapper mind map? Mindmapper scheduling function is actually our common Gantt Chart, used to help us with project management, control the progress of the task, efficiency and so on, because it is intuitive, flexible by most users, the following small series tells you how to add a schedule in the Mindmapper.
1, we open the run Mindmapper thinking map, click on the "
Machine Schedule
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 12621
Accepted: 5399
DescriptionAs we all know, machine scheduling are a very classical problem in computer science and have been studied for a very long hi Story. Scheduling problems differ widely in the nature of the constraints that must be satisfied and the type of schedul
POJ 1325 Machine Schedule (the minimum point set in the bipartite graph covers the Hungary algorithm)
Machine Schedule
Time Limit:1000 MS
Memory Limit:10000 K
Total Submissions:12621
Accepted:5399
DescriptionAs we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history. scheduling problems differ widely
Machine Schedule
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 14375
Accepted: 6135
DescriptionAs we all know, machine scheduling are a very classical problem in computer science and have been studied for a very long hi Story. Scheduling problems differ widely in the nature of the constraints that must be satisfied and the type of schedul
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