### Блог пользователя ahmed_aly

Автор ahmed_aly, история, 7 дней назад, ,

I'm sadly announcing that a2oj.com (A2 Online Judge) will be retiring by end of 2019, I'll shut it down at midnight on New Year's Eve. It was something I took care of for about 10 years.

I'm really sorry, but I prefer not to explain my reasons, so please don't ask me why I'm doing this, it was hard enough for me to make this decision, and also please don't try to convince me to change my mind.

I'd like to say thank you to everyone who used it, and please accept my sincere apologies for shutting it down.

If you have something good to say about A2OJ (how you used it or how it helped you in any way), I'd love to read that, please send it to the following email (or in a comment here): bye@a2oj.com

Also please feel free to take a copy of any data you can access, and if you need some data in a specific format, please send your request to the following email: bye@a2oj.com (if the data isn't public, make sure to send from your registered and verified email which can access this data). I'll do my best to fulfill all requests.

Please only use the above email, because soon I'll be deactivating my personal Facebook account again, I'll also deactivate A2 Online Judge.

Edit 1: I'll keep a static version of all Ladders & Categories.

Edit 2: Here's how I generated the ladders, in case if anyone wants to implement it: https://codeforces.com/blog/entry/47442

• +1735

 » 7 дней назад, # |   +26 I just started using it and sadly its retiring already. But, thanks for your 10+ years of work for newbies like me.
 » 7 дней назад, # | ← Rev. 2 →   +9 is there any other sites as such which can help us like a2 online judge ahmed_aly?and thanks for the site. I had recently started using it again
•  » » 7 дней назад, # ^ |   0
•  » » 7 дней назад, # ^ |   0 If you need recommendations, you can code-drills by Balajiganapathi
•  » » 7 дней назад, # ^ |   +111 codeforces.com
•  » » » 7 дней назад, # ^ |   +117 what is this?
 » 7 дней назад, # |   +15 It's so sad to know that you will be closing the site. Good luck for your future.Can anyone please make a Google sheet for all the ladders that are present on A2OJ.Thanks in Advance.
•  » » 7 дней назад, # ^ |   +78 I'll keep static pages of all Ladders & Categories.
•  » » » 7 дней назад, # ^ |   +7 means there will be no updates in the website but the problems will be there
•  » » » » 7 дней назад, # ^ |   0 Does that mean I can access those ladder, feature of problem dependency will be there or not?
•  » » » » 6 дней назад, # ^ | ← Rev. 3 →   +75 Added all ladders from 11 to 21, please checkUPD. Added ladders from 22 to 31
•  » » » » » 5 дней назад, # ^ |   0 Thanks dmkozyrev .
•  » » » 7 дней назад, # ^ |   0 Man you are the best. Thanks for your 10+ years of work and helping people to improve their coding skills systematically using the online judge. Thanks
•  » » 6 дней назад, # ^ |   0 ask ahmed sir i too need it..
 » 7 дней назад, # |   +113 Just a suggestion: Can the ladders be included somehow in Codeforces website. Its a really good collection of problems.MikeMirzayanov Sir can this be done?
 » 7 дней назад, # |   +3 Auto comment: topic has been updated by ahmed_aly (previous revision, new revision, compare).
 » 7 дней назад, # |   +130 why not giving it to someone who can care instead?
•  » » 7 дней назад, # ^ |   +7 Codeforces itself maybe?
 » 7 дней назад, # |   +1 I was currently using it for improving my skills for div2 C and D problems. This is really a sad newss :(
 » 7 дней назад, # | ← Rev. 2 →   +30 FFFFFFFF F FFFFFF F F F F 
 » 7 дней назад, # |   +19 why i am really sad ! the ladder helped me a lot and still .. i wish you can change your mind
 » 7 дней назад, # |   +3 I just started using it few weeks ago and its sad to know that it will be closed soon . The ladders was an awesome concept and i am very much thankful for that.
 » 7 дней назад, # |   +16 M3lsh..
 » 7 дней назад, # |   +93 The ladders have helped me a lot in progressing (especially the feature about not being able to look at the next problem unless you ac the current one). Thanks for creating it in the first place.
•  » » 7 дней назад, # ^ |   0 ahmed_aly will you keep this feature as well with the ladders?
 » 7 дней назад, # |   +23 Sad to hear this. Your site helped me and my friends a lot. I'm grateful for all the work and effort you've put in. If you decided to do so, then go ahead.
 » 7 дней назад, # |   +9 seriously Why doesn't Codeforces have Sad reacts? :"(
 » 7 дней назад, # |   0 I use this site mostly to find the problem in category.
 » 7 дней назад, # |   0 F
 » 7 дней назад, # |   +65 This site was super helpful for me after I finished USACO training pages. Thanks for making it :) I'm glad you're keeping a static version of the ladders/categories.
•  » » 7 дней назад, # ^ |   -23 Love your answers on Quora, Aman!
 » 7 дней назад, # |   +26 Open source it.
 » 7 дней назад, # |   +1 It's very helpful for all programmers because there is a set of problems for all categories, Ladders are so helpful for all programmers also.
 » 7 дней назад, # |   -116 vjudge >> a2oj
 » 7 дней назад, # | ← Rev. 2 →   +2 End of an era. Thanks man Ahmed
 » 7 дней назад, # |   +93 Maybe you could find someone willing to host it instead.
 » 7 дней назад, # |   -58 Kindly do not deactivate! I have just started using it.It is quite useful. Kindly change your mind please.
•  » » 7 дней назад, # ^ |   +87 and also please don't try to convince me to change my mind. And I really like how this is not even an elaborate attempt to change their mind, there's no reassuring speech, no "A2OJ has been so important to many", no arguments at all, just "pls change your mind!!"
•  » » » 7 дней назад, # ^ |   0 There are probably so many reasons, that he couldn't list them in a single comment. :)
 » 7 дней назад, # |   -8 please make an excl sheet of every categories and ladder also. Thanks <3
•  » » 7 дней назад, # ^ |   0
•  » » » 7 дней назад, # ^ |   0 ok
 » 7 дней назад, # |   -35 idk but it was the great site for beginners, please don't shut it down :( please.
 » 7 дней назад, # |   +4 F
 » 7 дней назад, # |   +3 Ladders help me a lot. I will miss you A2. And thanks for your contribution.
 » 7 дней назад, # |   -8 If possible please hand it over to someone or rather Codeforces to take care of it and continue updating the website as it has been very helpful to many of us and will be helpful in the future.Thanks for all the efforts.
 » 7 дней назад, # |   +6 thanks you so much a2oj
 » 7 дней назад, # |   0 how about the chances to re-run a2oj in the future?
 » 7 дней назад, # |   0 I can't receive verification email,and it isn't in the spam,is it still working?
 » 7 дней назад, # |   0 "I am not crying......"
 » 7 дней назад, # |   +3 a2oj, ffffffffffffffffffffffffffffff, please make your project open source or give someone who can care about it
 » 7 дней назад, # |   +2 The ladders have helped me a lot. Thank you so much a2oj we will miss you. Goodbye :(
 » 7 дней назад, # |   0 My memories <3 Bye
 » 7 дней назад, # | ← Rev. 2 →   +4 Thanks for 10 years of dedication :((
 » 7 дней назад, # |   +3 Is it possible to create a group here in CF and then add all ladders as contests, because the problem selection in the ladders is very nice.
 » 7 дней назад, # | ← Rev. 2 →   +10 I am really very sad to hear it. It was a large online judge with problems of tasks from various sources with handy ladders & categories. Your site really helps me and my friends... Thank you for 10 years of hard work!
 » 7 дней назад, # |   0 Will miss A20j badly. The ladder have helped me a lot. As you made up your mind, I will respect your decision, but its a request from whole cp community to please make your project opensource. Thank you and good bye A2oj :(
 » 7 дней назад, # |   +23 Can you please add the contests on the website to the Codeforces Gym? These contests have great value and many people can get benefits from them.I'm willing to help you with this
 » 6 дней назад, # |   0 I wish one day someone will come forward and make something like a2oj and help the newcomers to get the best pathway for better problem solving as it did to me .. #will_miss_u_a2oj.
 » 6 дней назад, # |   0 I had been a wanderer in terms of problem solving, with no proper idea or plan on how to practice well to solve more problems in contests. Thus my progression in terms of effective practice had been going down the ranking. Thanks to A2Oj I not only beleived that the ladders would be effective if I solved accordingly, I have also been getting the results.Thank you so much. Good luck.
 » 6 дней назад, # |   -10 please please don't do this if you are shutting it down can you please merge it with code forces
 » 6 дней назад, # |   0 This site help me alot thanks for your hard work And i wish good for you
 » 6 дней назад, # |   0 Auto comment: topic has been updated by ahmed_aly (previous revision, new revision, compare).
 » 6 дней назад, # |   0 I am so sad .... A2 Online Judge helped me a lot in my past . Thank you man for every thing you did ahmed_aly .
 » 6 дней назад, # |   0 “Say bye .”"Bye Bye!"
 » 6 дней назад, # |   0 Oh no!!!!!!!! That's too sad !!!!!!!!!!!!
 » 6 дней назад, # |   0 Thank you for all your hard work. Please accept my gratitude as your ladder helped me alot to overcome and understand how to practice CP.
 » 6 дней назад, # |   +2 can anyone please explain me what difference will occur after static version.means then also we can access problems and solve them.so what will be difference??
 » 6 дней назад, # |   0 I used a2oj during last winter holiday, it helped me gain pretty much CP knowledge and win a gold medal in this year's ICPC, thanks and goodbye.
 » 5 дней назад, # |   +1 Bye a2oj, you were an incredible online judge and I will solve on you till the last moment
 » 5 дней назад, # |   0 A2OJ really helped me a lot in improving my coding skills. Thanks a lot man A2OJ will be remembered forever
 » 4 дня назад, # |   0 nooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
 » 4 дня назад, # |   0 When i found this,I was a beginner! CP was new for me! These ladders are good teachers especially for people like me who give up quite fast when you cant find the solutions in few minutes or hours!but unable to get the next question kept me trying my best to find out the other ways of doing the current question!much thanks to ahmed! thanks a lot! from--> A BEGINNER !
 » 3 дня назад, # |   0 This sounds not good for me. By the way, this site was very helpfull.