The Canadian Computing Competition is in just over a month! Once again, a mock CCC has been prepared for individuals wishing to get additional practice for the CCC.

The first mock CCC this year will run during the weekend of January 19th. The junior and senior divisions do not share any problems, so you can participate in both if you want additional practice! Although we announced beforehand that the senior contest would be rated, it will no longer be rated.

We expect all contestants to write the mock CCC under real CCC conditions. Please read the rules on the contest page to ensure that you are in compliance. In particular, we would like to remind all contestants that you may not use any pre-written code.

Good luck to everyone writing the CCC!

Thanks for participating in the New Year's 2019 Contest!

The winners are:

1. ksun48
2. lg52931
3. SourSpinach
4. fjzzq2002
5. kyleliu11111

We hoped you enjoyed the contest!

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We hope everyone's been enjoying their winter break because it's about to get better!

On January 4, we will be hosting DMOJ's own New Year's 2019 contest. Please see the contest page for details.

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

See you soon, good luck, and Happy Holidays from all of the DMOJ crew!

Thanks for participating in the second LKP Programming Contest!

The winners are:

1. fjzzq2002 (perfect score)
2. Deemo (perfect score)
3. SourSpinach
4. kyleliu11111
5. SamZhangQingChuan

We hope you enjoyed the contest!

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On Friday, December 28th, we'll be hosting the second LKP 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 12:00 EST of Dec. 28th and 12:00 EST of Dec. 31th. Please see the contest page for more details.

See you soon!

Thanks for participating in the DMOPC '18 December contest!

The winners are:

1. ksun48 (perfect score)
2. neal
3. Eliden
4. koosaga
5. ekzhang

Editorials for each of the problems have been uploaded to the respective problem pages.

We hope you enjoyed the contest, and see you next month!

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On Tuesday, December 11th, we'll be hosting the December 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 Dec. 11th and noon EST of Dec. 12th. Please see the contest page for more details.

See you soon!

Congratulations to the winners of the first GlobeX Cup!

The winners of the junior division of GlobeX Cup '18 are:

1. ericlong2 (perfect score)
2. alvin123321 (perfect score)
3. Fungucide (perfect score)

The winners of the senior division of GlobeX Cup '18 are:

1. zhouzixiang2004 (perfect score)
2. aeternalis1 (perfect score)
3. KevinWan (perfect score)

Once again, congratulations to the winners this year. An email has been sent regarding your awards.

Editorials to problem statements will be posted within the next two months.

We hope that you enjoyed the contest and hope to see you again next year!

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We're excited to invite you to participate in the GlobeX Cup!

The contest will take place on December 15-16 for a 24-hour window. Once you enter the contest, you will have 3 hours to solve the designated problem statements. It will be split into two divisions of increasing difficulty, with more than $1000 in prizes awarded to the top competitors.

Contest

There are two different divisions featuring problem difficulties from elementary to advanced. To determine which division suits you the best, try the junior sample and the senior sample.

Registration

Please fill out this form in order to register for the contest and be eligible for prizes.

Prizes

• 1st Place Junior & Senior: Wolfram|One + Wolfram|Alpha Pro
• 2nd Place Junior & Senior: Any JetBrains Product
• 3rd Place Junior & Senior: Free Admission to TOHacks

Contact

For any inquiries, please email [email protected] or message our Instagram page GlobeXCup.

Details

WEBSITE | DETAIL / RULES | TEAM | SPONSORS

We're excited to invite you to Another Contest 3, the third contest in the Another Contest series!

After seeing the second contest be run, we're adding a fourth problem to the contest and shifting the difficulty curve to be more friendly for less experienced participants. You can see the full parameters of the contest on the contest page.

Good luck to all participants!

Thanks for participating in the first LKP Programming Contest!

The winners are:

1. bruce
2. y0105w49
3. neal
4. SourSpinach
5. arararararararararararararagi

We hope you enjoyed the contest!

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On Saturday, November 17th, we'll be hosting the first LKP 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 16:00 EST of Nov. 17th and 16:00 EST of Nov. 19th. Please see the contest page for more details.

See you soon!

Thanks for participating in the DMOPC '18 November contest!

The winners are:

1. y0105w49
2. neal
3. RainbowRating
4. Eliden
5. KevinWan

Editorials for each of the problems have been uploaded to the respective problem pages.

We hope you enjoyed the contest, and see you next month!

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On Tuesday, November 13th, we'll be hosting the November 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 Nov. 13th and noon EST of Nov. 14th. Please see the contest page for more details.

See you soon!

We're excited to invite you to Another Contest 2, the second contest in the Another Contest series!

After seeing the first contest be run, we're changing up the format a little bit to make the contest experience more pure. Firstly, we're making the contest rated for everyone who opens the contest. Secondly, the scoreboard will be hidden for the duration of the contest. You can see the full parameters of the contest on the contest page.

We'll also be tuning the difficulty of Another Contest 2 to be lower than the difficulty of Another Contest 1.

Good luck to all participants!

This is the first of a series of blog posts about the task `meetings' from IOI18. It is also available in a contest that will take place in conjunction with these posts.

We chose this problem as an experiment to see whether we can present a single problem in a way that it covers a lot of useful knowledge for a contest related topic. In this aspect, meetings is a great task in that it starts with dynamic programming, then moves into range queries and tree constructions, and finally, finishes it off with geometric data structures.

Furthermore, the setting of meetings is as classical as a data structure problem can get: you get a static array, and you query about some statistic on its subintervals. This is a setting that has been viewed as "completely understood" by most competitors who aim for top 40 or higher at the IOI since around 2005. However, this problem was given, and had 0 solvers. I've also heard several past contestants who placed in the Top-3 at IOIs refer to this problem as "Godly", so that's another reason to discuss it in more details.

In short, the ideas underlying meetings are extremely novel, especially given how well understood the topic is. Also, if mechanically you can solve meetings in 2 hours reliably, you shouldn't have trouble with most data structural topics.

Continue reading...