The DMOJ is a modern contest platform and archive of programming problems. It's also entirely open source.
So far, 105880 developers have submitted to 3775 problems a total of 3777109 times, using 67 languages.
If this is your first visit, please register an account. Then, try the Hello, World! problem.
Hi everyone!
From Saturday, July 31st to Wednesday, August 4th, we'll be hosting An Animal Contest 3. Participants will have a 3-hour window to complete 8 problems centered around monkeys! See the contest page for more details.
Note that unlike AAC2, AAC3 is rated for everyone.
We hope you enjoy the problems and have fun!
See you soon!
Hi all,
We are happy to announce that PEG accounts and problems have been migrated to DMOJ, and can now be accessed.
Some usernames on PEG could not be assigned on DMOJ, as they were already in use. A _wcipeg suffix was added to the PEG username in these cases. You can check this list to see if this applies to you.
PEG accounts may be merged into existing DMOJ accounts (in the case you had an account on both DMOJ and PEG, and would like to merge them into one). To initiate this process, visit your profile page while logged in to your PEG account, and follow the instructions.
All PEG submissions were regraded on DMOJ judge hardware to keep rankings consistent. You may view a spreadsheet of aggregate rejudging results here. Submissions to a number of problems (mainly IOI) have not yet been assigned to migrated accounts, but will become available in the coming days.
Feel free to let us know of any questions you may have in the comments, in Slack, or by email.
Hi everyone!
July 17th is World Emoji Day. On most platforms, the calendar emoji 📅 shows this date. Naturally, to celebrate this day, we'll be hosting a week-long contest about calendars. See the contest page for more details.
We hope you enjoy the problems and have fun!
See you soon!
Note: the contest has been extended to July 27th
From Saturday, July 24th to Tuesday, July 27th, we'll be hosting CPC '21 Contest 1!
The contest will feature 7 main problems, along with a P0, and will run for 3 hours. You can find more details on the contest page.
Good luck!
Thanks for participating in the Canada Day '21 Contest!
Congratulations to the top 5 contestants!
From Friday, July 2nd to Tuesday, July 6th, we'll be hosting the Canada Day '21 Contest!
Anyone with a DMOJ account is welcome to participate, and anyone without one is welcome to register and participate.
Contestants may participate in any 2-hour window between 00:00:00 EDT of July 2nd and 00:00:00 EDT of July 6st. Please see the contest page for more details.
Good luck!
Hi, everyone!
From Monday, June 21st to Monday, June 28th we'll be hosting the Bayview Secondary School 2021 Junior Programming Contest! This contest is a culmination of what Bayview Computer Club has learned over the past year. Unfortunately, the senior contest will be hosted at a later date. Participants will have a 3-hour window to complete 6 problems. See the contest page for more details.
We hope you enjoy the problems and have fun!
Thanks for participating in the DMOPC '20 June Contest!
Congratulations to the top 5 contestants!
We hope you enjoyed the contest! We'll see you next year for DMOPC '21!
From Saturday, June 19th to Monday, June 21st, we'll be hosting the June DMOJ Monthly Open Programming Contest!
Anyone with a DMOJ account is welcome to participate, and anyone without one is welcome to register and participate.
Contestants may participate in any 3-hour window between 00:00:00 EDT of June 19th and 00:00:00 EDT of June 21st. Please see the contest page for more details.
See you soon!
Thanks for participating in the DMOPC '20 May Contest!
Congratulations to the top 5 contestants!
See you next month!
From Saturday, May 29th to Monday, May 31st, we'll be hosting the May DMOJ Monthly Open Programming Contest!
Anyone with a DMOJ account is welcome to participate, and anyone without one is welcome to register and participate.
Contestants may participate in any 3-hour window between 00:00:00 EDT of May 29th and 00:00:00 EDT of May 31st. Please see the contest page for more details.
See you soon!
Hi, everyone!
From Saturday, May 22nd to Monday, May 24th we'll be hosting the first (and hopefully last) ever Quarantine Computing Contest! This contest features the very contagious COVID-19. Participants will have a 2.5-hour window to complete 7 problems. See the contest page for more details.
We hope you enjoy the problems and have fun!
Stay safe and see you soon!
Hi everyone!
From Friday, May 7 to Sunday, May 9, we'll be hosting An Animal Contest 2. Participants will have a 3-hour window to complete 7 problems centered around koalas! See the contest page for more details.
We hope you enjoy the problems and have fun!
See you soon!
