The DMOJ is a modern contest platform and archive of programming problems. It's also entirely open source.
So far, 118122 developers have submitted to 3984 problems a total of 4250753 times, using 68 languages.
If this is your first visit, please register an account. Then, try the Hello, World! problem.
Hi everyone!
From Saturday, January 22nd to Monday, January 24th, we'll be hosting An Animal Contest 5. Participants will have a 3-hour window to complete 6 problems centered around pandas! See the contest page for more details.
Note that AAC5 is not rated for users with at least 2400 rating.
We hope you enjoy the problems and have fun!
See you soon!
We hope you enjoyed the contest! Special congrats to the top 5 contestants:
We'll see you next month!
New year, new DMOPC! Start the year off with (what could be) a brand new colour!
The contest will run from Friday, January 14th to Monday, January 17th (inclusive of both days).
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 EST of January 14th and 00:00:00 EST of January 18th. Please see the contest page for more details.
As always, good luck and do your best!
Hi, everyone!
At last, the senior contest is here!
From Monday, December 27th to Wednesday, December 29th we'll be hosting the Bayview Secondary School 2021 Senior Programming Contest!
Participants will have a 3-hour window to complete 5 problems. See the contest page for more details.
Note that the contest is not rated for users with at least 2600 rating.
Note: This contest overlaps with AAC. As AAC finishes before BSSPC, it will be rated first. This means that your rating after AAC is rated will determine your eligibility to be rated in BSSPC. If you have concerns or questions, please ask.
We hope you enjoy the problems and have fun!
Hi everyone!
From Friday, December 24th to Monday, December 27th, we'll be hosting An Animal Contest 4. Participants will have a 3-hour window to complete 6 problems centered around christmas! See the contest page for more details.
Note that AAC4 is not rated for users with at least 2400 rating.
We hope you enjoy the problems and have fun!
See you soon!
Thanks for participating in the DMOPC this month! Congrats again to the top 5 contestants:
Happy holidays, and see you next year!
We're back! We know everyone is exhausted during this final stretch before the holidays, so we prepared another contest to cheer you up!
The contest will run from Friday, December 17th to Monday, December 20th (inclusive of both days).
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 EST of December 17th and 00:00:00 EST of December 21st. Please see the contest page for more details.
GLHF!! <3
Welcome to the WOSS Dual Olympiad 2021: Computer Science Individual Round!
The Junior Contest will have a difficulty range from CCC Junior 1 to CCC Junior 4
The Senior Contest will have a difficulty range from CCC Senior 1 to CCC Senior 3
The contest will be from December 14, 2021, 3:00 PM EST to December 20, 2021, 11:59 PM EST
The contest is hosted by WOSS Mathematics Club and WOSS Computer Science Club.
A special thank you to and for their help with contest organization and problem testing!
Thanks for participating! The top 5 contestants are
We hope to see you again in February!
Hi, everyone again!
On Friday, December 17th, 2021, we'll be running the second SAC Code Challenge for this year!
You can write this year's contest in any two-hour window between December 17th, 00:00 EST, until December 21st, 00:00 EST. The contest will be composed of 5 problems with problem difficulty ranging from CCC Junior 1 to CCC Senior 3.
Additionally, the problems will be themed around Christmas.
Like the most recent Code Challenge, there will be no registration requirements to participate.
You can find more details on the contest page.
We hope to see you soon!
SAC Code Culture.
DMOJ is hosting an unofficial mirror of the NOIP '21 — the Chinese National Olympiad in Informatics Provincial Round (NOIP, approximately equivalent to CCC Stage 1).
The contest can be found here.
There are 4 problems, each worth 100 points, and the contest window is 3 hours long.
This contest will not be rated.
As always, thanks for participating in the DMOPC this month! Special congrats to the top 5 contestants:
See you soon!
Hello again! Winter is now approaching, but so is the third DMOJ Monthly Open Programming Contest of the season!
The contest will run from Saturday, November 13th to Tuesday, November 16th.
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 EST of November 13th and 00:00:00 EST of November 16th. Please see the contest page for more details.
See you soon!
Thanks for participating! The top 5 contestants are
We hope to see you again in December!
Hi, everyone!
On Friday, October 29th, 2021, we'll be running the first annual and second-ever SAC Code Challenge!
You can write this year's contest in any two-hour window between October 29th, 00:00 EDT, until November 1st, 00:00 EDT. The contest will be composed of 5 problems with problem difficulty ranging from CCC Junior 1 to CCC Senior 3.
Additionally, the problems will be themed around Halloween.
Unlike last year, there will be no registration requirements to participate.
You can find more details on the contest page.
We hope to see you soon!
SAC Code Culture.
