The DMOJ is a modern contest platform and archive of programming problems. It's also entirely open source.
So far, 42726 developers have submitted to 2316 problems a total of 1602895 times, using 67 languages.
If this is your first visit, please register an account. Then, try the Hello, World! problem.
From Friday, October 11th to Sunday, October 13th, we'll be hosting the October 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 0:00 am EDT of Oct. 11th and 0:00 am EDT of Oct 14th. Please see the contest page for more details.
See you soon!
Thanks for participating in the DMOPC '19 September contest!
Congratulations to the top 5 contestants!
We hope you enjoyed the contest, and we look forward to seeing you in DMOPC '19 October!
From Friday, September 13th to Sunday, September 15th, we'll be hosting the September 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 0:00 am EDT of Sept. 13th and 0:00 am EST of Sept 16th. Please see the contest page for more details.
See you soon!
Summer is just about over, and school is around the corner. We hope you had a great summer, and we want to make your school year even greater by kicking off with a new rated contest, Back From Summer '19!
The contest will take place between Sunday, September 1, 9AM EDT and Monday, September 2, 9PM EDT, where participants can participate in any 3 hour window.
There will be 6 problems, with expected difficulty of the CCC Senior contest. The problem setters are , , , , and . Good luck!
See the contest page for more details.
Olympiads Computing Competition (OCC) is a fun event for all secondary school students with an interest in programming.
OCC will be a live on-site contest and it will take place at Olympiads School on Saturday, August 31, 2019.
The competition is not limited to Olympiad School students. Anyone who has an interest in programming is welcome.
There are three different divisions featuring problems with difficulty ranging from CCC Junior to IOI.
Please note that if you qualified for the Canadian Computing Olympiad (CCO) in any year, you will be forced to write the gold division.
Please fill out this form in order to register for the contest and be eligible for prizes.
For more details: click here.
It’s that time of the (school) year again, and to celebrate, we present the Back to School '19 contest! Get back into your tip top programming shape and start the school year with a new rating!
The contest will take place between Friday, September 6, 3PM EDT and Sunday, September 8, 11:59PM EDT, where participants can choose a single 4 hour window to compete.
There will be 8 problems, with expected difficulty ranging from CCC Junior to IOI level. The problem setters are , , and . Good luck to all participants!
See the contest page for more details.
We're excited to invite you to Another Contest 5, the first rated contest to be run under the new AtCoder format! This contest format is slightly different from the format used for other contests, so please see the contest page for all the technical details.
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 on the weekend of July 20th.
Good luck to all participants!
Welcome to a new rated DMOJ contest series!
From June 29th to July 1st, we'll be hosting Wesley's Anger Contest! By popular demand, all problems in this contest will have some graph theory component.
Anyone with a DMOJ account is welcome to participate, and anyone without one is welcome to register and participate.
Contestants may participate in any 4-hour window between June 29th, 9:00 AM to July 1st, 11:59 PM. Please see the contest page for more details.
Good luck to all the participants!
Thanks for participating in the Competitive Programming '19 Contest!
The winners are:
Editorials for each of the problems have been uploaded to the respective problem pages.
Once again, a final thank you to all who participated, and to the problem authors!
Welcome to a non-standard DMOJ contest!
From May 4th to May 5th, we'll be hosting the Competitive Programming Contest!
The problem setters are: , , , , and .
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 May 4, 9:00 AM to May 5, 9:00 PM. Please see the contest page for more details.
After a nearly year-long hiatus, we're excited to announce the 2018-19 Trudeau Logic Evaluation!
The problem setters of this contest are , , and , the current leaders of the Pierre Elliott Trudeau High School Computer Science Club. But don't fret, as all problems have been tested and approved by and !
The TLE 2018-19 is a 3-hour virtual contest, which will allow contestants to participate in any 3-hour window from 12:00 AM EDT, March 30, 2019 to 11:59 PM EDT, April 5, 2019. Please see the contest page for more details.
We hope that you will enjoy the contest!
Thanks for participating in the DMOPC '18 March contest!
Once again, we apologize for the incorrect P6. It has been removed from the contest. Anyone who feels they were significantly affected by this is asked to DM on Slack.
Congratulations to everyone who got a perfect score!
Editorials for each of the problems have been uploaded to the respective problem pages.
We hope you enjoyed the contest, and we hope to see you at DMPG!
On Tuesday, March 12th we'll be hosting the March 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 noon EST of Mar. 12th and noon EST of Mar. 13th. Please see the contest page for more details.
See you soon!
