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SGS Programming Challenge

AustinJiang, andy_zhu23 posted on Oct. 4, 2022, 11:02 a.m. 0

SGS Banner

Welcome to the St. George's School Programming Challenge!

The contest will run from Saturday, October 8th to Monday, October 10th (inclusive of both days).

Anyone with a DMOJ account is welcome to participate, and anyone without one is welcome to register and participate.

The contest is rated for all users with a rating less than 2400.

Please see the contest page for more details.

Have fun!

DMOPC '22 September Contest

zhouzixiang2004, Riolku, 4fecta posted on Sept. 27, 2022, 3:54 p.m. 0

We hope you enjoyed the first DMOPC contest of the season! As usual, special congrats to the top 5 contestants:

  1. ksun48 (perfect score!)
  2. Gennady
  3. BalintR
  4. yuyue
  5. kotatsugame

See you soon!


Sorry for the wait! We are back, and excited to announce that the first DMOPC of the new school year will be held this coming weekend!

The contest will run from Friday, September 30th to Monday, October 3rd (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 EDT of September 30th and 00:00:00 EDT of October 4th.

Please see the contest page for more details.

Have fun!!

An Animal Contest 7

WilliamWu277, andrewtam, julian33, Tony1234 posted on Sept. 2, 2022, 3:09 p.m. 0

Hello everyone!

From Saturday, September 3rd to Monday, September 5th, we'll be hosting An Animal Contest 7. Participants will have a 3-hour window to complete 6 problems centred around squirrels!

Note that An Animal Contest 7 is rated for all participants with less than 2600 rating.

For more details, please see the contest page.

We hope you enjoy the problems and have fun!

See you soon!

Yet Another Contest 4

Josh, Nils_Emmenegger, RandomLB posted on Aug. 1, 2022, 9:15 p.m. 0

YAC Banner

Hi everyone!

This is yet another announcement that it is yet another time for yet another Yet Another Contest!

The contest will run from Friday, August 5th to Monday, August 8th. 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. This differs from previous YACs.

For more details, please see the contest page.

Good luck and have fun!

A Math Contest

d, Plasmatic, Josh, TechnobladeNeverDies, Joelfu, BalintR, Lost, Tommy_Shan, LogicXD posted on July 13, 2022, 12:00 a.m. 0

AMC Banner

Hello everyone!

The fundamental theorem of math states that math is difficult. To make some math topics more approachable, we've decided to create a contest to help you brush up on your skills!

We will be hosting A Math Contest from Tuesday, July 12th, to Tuesday, July 26th. You will have 15 days to solve 17 problems of roughly increasing difficulty.

This contest will be unrated.

For more details, please see the contest page.

Good luck and have fun!

Another Random Contest 1

HenryYi, andy_zhu23 posted on June 27, 2022, 7:08 p.m. 0
ARC Banner

Hello everyone!

To keep everyone's summer break busy, here comes Another Random Contest!

This contest will be unrated.

The contest will run from Wednesday, June 29th to Saturday, July 2nd. Participants will have a 3-hour window to complete 6 problems.

For more details, please see the contest page.

Good luck and have fun!

DMOPC '21 June Contest

zhouzixiang2004, Riolku, 4fecta posted on June 22, 2022, 3:57 p.m. 0

We hope you enjoyed the last contest of the DMOPC 2021-2022 season! As usual, special congrats to the top 5 contestants:

  1. Gennady (perfect score!)
  2. ecnerwal (perfect score!)
  3. ksun48
  4. noimi
  5. xiaowuc1

See you in September!


We made it! We are excited to announce that the 10th and final DMOPC of the school year will be held this coming weekend!

The contest will run from Friday, June 24th to Monday, June 27th (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 EDT of June 24th and 00:00:00 EDT of June 28th.

Please see the contest page for more details.

Good luck!!

Bloor CI Programming Contest 1

squishybanana04, BalintR posted on June 17, 2022, 12:49 a.m. 0
BPC Banner

Hello everyone!

We will be hosting the first-ever Bloor C.I. Programming Contest from Saturday, June 18th to Tuesday, June 21st. The contest will have a junior and a senior division.

The junior contest will be unrated and the senior contest will be rated for all participants.

You can find more details at the contest page for the junior contest and the contest page for the senior contest.

Good luck and have fun!

Cheerio Contest 1

EdwinSun, InkJoy, LeviDanjio, rickyqin005, ShawnChen4 posted on June 5, 2022, 10:13 p.m. 0

Hello fellow programmers!

On Thursday, June 9th, from 3:30 pm to 12:00 am (Eastern Daylight Time), we'll be hosting the first-ever Cheerio Contest! The contest will be split into a junior division (for those new to programming) and a senior division (for experienced programmers). Both divisions will be unrated.

The junior contest page can be found here.

The senior contest page can be found here.

We hope to see you soon!

Richmond Hill High School CS Club

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Yet Another Contest 3

Josh, Nils_Emmenegger, RandomLB posted on May 21, 2022, 11:35 p.m. 1

YAC Banner

Hi everyone!

It's yet another time for yet another Yet Another Contest!

The contest will run from Friday, May 27th to Monday, May 30th. Participants will have a 3-hour window to complete 5 problems.

Note that the contest is not rated for users with at least 2600 rating.

For more details, please see the contest page.

Good luck and have fun!

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Ongoing contests

COCI '22 Contest 3 Unofficial Mirror
Ends in 11 days 09:46:27.
Mock CCC '23 2 Senior
Ends in 11 days 09:46:27.
Waterloo 2023 Winter Local Unofficial Mirror
Ends in 11 days 09:46:27.
Cheerio Contest 3
Ends in 4 days 09:46:27.

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
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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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