Update: Thank you to all who participated!
If you were not able to take part (probably due to actual exams), below are the problems for you to solve post-contest:

French Homework
Physics Duel
Chemistry Homework
Exam Delay
Happy Teachers
Math Homework

The first Don Mills Open Programming Competition of 2015 will be held on Tuesday, January 13 from 3:30 to 8:30 PM.

There were initially no plans for a January Contest due to exams, which is why Sentient came up with a contest based on exams! Therefore you may think of this as the January Contest, except that it will be 5 hours long rather than the usual 3 (the difficulty will remain similar to previous DMOPCs and it should take most participants about an hour to solve the first 3 problems).

You can access the contest page here.

Back in the days students were forced to choose between studying for their school exams and participating in programming contests. No more will they have to endure such harsh conditions! With the creation of the Exam Time Contest, you can prepare for your exams as you complete the questions in this contest.

Moreover, what was supposed to be an ordinary exam week at Don Mills takes a turn for the extraordinary in the last few problems.

Do you find yourself with nothing to do even on December 25?

Xyene and Kirito have prepared a contest for this day. The contest will last for 4 days, and there are 3 problems in total.

The theme is about trees. If you like trees or want to learn more about graph theory, you should check out this contest.

https://dmoj.ca/contest/christmastree

Unfortunately, the author of the contest has decided to push the contest back to December 29. We are sorry for the inconvenience!

In its place, we offer a new contest about trees -- check the contest page for more details!

Oh no, the Phantom has kidnapped Christine Daaé and is about to force her into a marriage with him. Raoul, the vicomte de Chagny, is anxious to stop this, and make Christine marry him instead return freedom to Christine. The Persian, an old acquaintance of the Phantom, is also determined to stop the Phantom's terrorism of the Opera house, and to save Christine from a forced marriage, joins in with Raoul.

The Phantom hid Christine inside his house on the lake under the Opera house, well guarded. Can you help the duo break through all the defences to save Christine? We know that the Phantom, like any other crypto nerd, likes prime numbers...

The pressure is on. Solve these problems!

• The Mirror
• The Third Cellar
• The Torture Chamber
• And the ultimate challenge: Phantom's Python Challenge

Contest Link: https://dmoj.ca/contest/stnbd

It is an ongoing week-long contest. Check out the contest page for more details.

Thanks to everyone who participated in the DMOPC December! The contest is now over.

If you have the time, please fill out an anonymous survey so we can make the next DMOPC even better.

If you have disagreements about judging verdicts, feel free to send them to us. We don't guarantee anything, but we will certainly read your appeal and consider it carefully.