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Canada Day '21 Contest

Aaeria posted on June 30, 2021, 12:44 p.m. 2

Thanks for participating in the Canada Day '21 Contest!

Congratulations to the top 5 contestants!

  1. zhouzixiang2004 (perfect score)
  2. ecnerwal (perfect score)
  3. Maksim1744 (perfect score)
  4. Dormi (perfect score)
  5. endagorion (perfect score)

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!

BSSPC 2021 Junior

Enming, Nettlespike, bigskid, sushi, noYou, eggy, azeng posted on June 20, 2021, 1:29 p.m. 0

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!

DMOPC '20 June Contest

Kirito, Eliden, Riolku, 4fecta posted on June 15, 2021, 11:10 a.m. 0

Thanks for participating in the DMOPC '20 June Contest!

Congratulations to the top 5 contestants!

  1. ksun48 (perfect score)
  2. ecnerwal
  3. d
  4. ainta
  5. tabr

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!

DMOPC '20 May Contest

Kirito, Eliden, ADMathNoob, Riolku, 4fecta posted on May 24, 2021, 9:55 a.m. 0

Thanks for participating in the DMOPC '20 May Contest!

Congratulations to the top 5 contestants!

  1. zhouzixiang2004 (perfect score)
  2. ksun48 (perfect score)
  3. ecnerwal
  4. y0105w49
  5. dalt

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!

Quarantine Computing Contest

ArtyKing12, maxcruickshanks, lookcook, Encodeous, qwertytown4life posted on May 18, 2021, 10:20 p.m. 0

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!

An Animal Contest 2

WilliamWu277, sjay05, ThingExplainer, samliu12, Tony1234, danielz1000 posted on May 3, 2021, 5:00 p.m. 0

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!

SAC Code Challenge 2021

maxcruickshanks posted on April 28, 2021, 10:50 p.m. 2

Hi, everyone!

On Wednesday, May 5th, 2021, we'll be running the first annual SAC Code Challenge!

You can write this year's contest in any two-hour block between 8:00 EDT and 22:00 EDT. The contest will be composed of 5 problems with a similar difficulty gradient to the CCC Junior contest.

To register, please request to join the SAC Code Challenges group, making sure to follow the instructions. Please ensure you register BEFORE the contest date.

You can find more details on the contest page.

We hope to see you soon!
SAC Code Culture.

DMOPC '20 April Contest

AvaLovelace, Riolku, 4fecta posted on April 20, 2021, 1:56 p.m. 0

Thanks for participating in the DMOPC '20 April Contest!

Congratulations to the top 5 contestants!

  1. bruce
  2. zhouzixiang2004
  3. d
  4. y0105w49
  5. ksun48

See you next month!


From Saturday, April 24th to Monday, April 26th, we'll be hosting the April 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 April 24th and 00:00:00 EDT of April 26th. Please see the contest page for more details.

See you soon!

UCC Coding Competition 2021

Kevy3030 posted on April 6, 2021, 7:47 p.m. 0

Hi everyone,

We are proud to present the second annual UCC Coding Competition, a 2-hour, 5-problem competition open to all high school students. The contest will run from 8:00am on Thursday, April 22 to 8:00pm on Monday, April 26 (Eastern Daylight Time).

To register, please follow the instructions on our official contest webpage. The contest will be hosted on DMOJ, and you will have to submit your personal information when joining this organization. Please ensure that you register before April 20.

An official honour roll will be published on the contest page, the top scorers will be named as "Coders of the Year", and schools will be ranked by the sum of the three highest scores from each school. As such, please be sure to tell other students in your school to participate (perhaps get your school's coding club involved)!

You can find last year's contest problems here. If you would like to prepare, you can try to solve these problems - they are also available on DMOJ here.

Good luck to all participants!

UCC Coding and Algorithms Academy.

DMOPC '20 March Contest

WallE256, AvaLovelace, Riolku, 4fecta posted on March 8, 2021, 4:10 p.m. 0

Thanks for participating in the DMOPC '20 March Contest!

Congratulations to the top 5 contestants!

  1. bqi343 (perfect score)
  2. zhouzixiang2004 (perfect score)
  3. bruce (perfect score)
  4. ksun48 (perfect score)
  5. ecnerwal (perfect score)

See you next month!


From Saturday, March 13th to Monday, March 15th, 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 00:00:00 EST of March 13th and 00:00:00 EDT of March 15th. Please see the contest page for more details.

See you soon!

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Ongoing contests

COCI '22 Contest 3 Unofficial Mirror
Ends in 11 days 09:30:59.
Mock CCC '23 2 Senior
Ends in 11 days 09:30:59.
Waterloo 2023 Winter Local Unofficial Mirror
Ends in 11 days 09:30:59.
Cheerio Contest 3
Ends in 4 days 09:30:59.

Comment stream Discord

  • gj504772 → CCC '12 S5 - Mouse Journey
  • CenteredBloom → Hello, World! (Hard)
  • Fares_X → CCC '21 S1 - Crazy Fencing
  • korok → CCC '21 S4 - Daily Commute
  • OwenKuang → CCC '16 S1 - Ragaman
  • usererror82 → COCI '12 Contest 5 #1 Ljestvica
  • III → Mock CCC '20 Contest 2 S3 - Tree Programming
  • VictorZhu → Mock CCC '15 J1 - 416
  • oscarhuang885 → Max's Anger Contest Series 1 P1 - Hunger Bar
  • dnialh_ → CCC '05 J3 - Returning Home
RSS / Atom

New problems

  • Waterloo 2023 Winter A - So I’ll Max Out My Constructive Algorithm Skills
  • Waterloo 2023 Winter B - Laser Trap
  • Waterloo 2023 Winter C - Sandpile on Clique
  • Waterloo 2023 Winter D - Link-Cut Tree
  • Waterloo 2023 Winter E - Colourful Tree
  • COCI '22 Contest 3 #1 Estimathon
  • COCI '22 Contest 3 #2 Dirigent
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