The DMOJ is a modern contest platform and archive of programming problems. It's also entirely open source.
So far, 190287 developers have submitted to 5099 problems a total of 7065273 times, using 70 languages.
If this is your first visit, please register an account. Then, try the Hello, World! problem.
Hello everyone,
As you are likely all aware, AI has improved dramatically at programming recently. Starting now, all usage of AI on rated contests is prohibited. This includes but is not limited to, ChatGPT and Copilot.
We thank you for your cooperation.
Greetings all!
I am pleased to announce my first (rated) DMOJ contest!
The contest will begin on February 18th, 2025 00:00 ET and will last one week. Participants will have a 3-hour window to solve 6 problems.
The contest is rated for all participants.
For more information, please visit the contest page.
Good luck, and have fun!
Hi everyone!
This Thursday, we'll be hosting the third OTHS Coding Competition! The format of this contest will be the same as the CCC.
The contest will be unrated. For more details, check out the contest page.
Have fun!
Hi everyone!
The Dr. Anne Anderson High School Coding Club is proud to announce the first ever Dr. Anne Anderson Coding Contest!
It will take place from February 11th at 17:10 EST to February 18th at 00:00 EST. Participants will have a 2-hour window to complete 6 problems.
The contest will be rated for participants with a rating under 1800. For more info, take a look at the contest page.
Good luck and have fun!
Hi everyone!
Yet another time, this is yet another sentence in yet another paragraph in yet another message in yet another blog post with yet another announcement that there is yet another opportunity for yet another Yet Another Contest!
The contest will run from Friday, January 10th to Monday, January 20th. Participants will have a 3-hour window to complete 6 problems.
Note that the contest is not rated for users with at least 2800 rating.
Good luck and have fun!
Hey everybody!
UTS is back just in time for its triennial open contest! Get ready for UTS Open '24!
The contest will begin on December 31st, 2024 00:00 EST and will last one week. Participants will have a 3 hour window to solve 6 problems.
The contest is rated for participants with a rating less than 2400.
For more information, please visit the contest page.
Good luck, have fun, and happy new year!
Hello everyone!
The Arcadia High School Coding Club is excited to announce the first ever Arcadia Computing Contest! There will be 5 questions, with one and a half hours to solve them. The contest will start on November 13th at 6:30pm EST and will be open for a week.
The contest will be unrated. For more details, check out the contest page.
Good luck and we hope you enjoy the problems!
Hi everyone!
This Thursday, we'll be hosting the second OTHS Coding Competition!
The contest will be unrated. For more details, check out the contest page.
Have fun!
All problems from day 1 and day 2 of IOI have been added. You may access them here.
An unofficial mirror for day 1 and day 2 of the contest has been set up.
Finally, we wish to congratulate team Canada for their amazing performance at IOI!
Hi everyone!
As we gear up for another exciting school year, what better way to kick things off than with a DMOJ contest? With that, we present the Back to School '24 contest!
The contest will take place from Saturday, August 31st to Sunday, September 8th. Participants will have a 3-hour window to complete 6 problems.
The contest is rated for all users with a rating less than 2400.
For more information, please visit the contest page.
Good luck and have fun!