Hello Codeforces!

--d and I would like to invite everyone to write the Trudeau Logic Evaluation (TLE) 2016 December contest. The TLE is a monthly contest series written by high school students, predominantly from Pierre Elliott Trudeau High School, Canada. The contest serves as preparation for OI-style contests such as the CCO (Canadian Computing Olympiad) and IOI (International Olympiad in Informatics). The contest will be hosted on the DMOJ platform.

The contest will consist of 6 problems, and the problem difficulty will range from Div. 2 A to Div. 1 D. Only problems 4, 5, and 6 will have pretests, and partial points (in the form of subtasks) will be awarded!

The contest window will be 24 hours long and will last from 12:00 EST, December 23, 2016 to 12:00 EST, December 24, 2016. You may start your 3 hour interval at any time during this contest window, but be wary of the hard deadline at 12:00 EST, December 24 if you want to start late!

The top 5 winners overall and the top 2 winners from Pierre Elliott Trudeau High School will each receive a free t-shirt!

For more information, visit the contest page!

We hope that you will enjoy the contest and we wish you a Merry Christmas!

EDIT 1

The contest is starting in 1 hour! Due to request(s), the time window has also been extended by 11 hours.

EDIT 2

The contest has started! The contest window is open until 11PM EST on December 24, 2016.

EDIT 3

11 hours until the contest ends! Only 1 participant has passed pretests for problems 4, 5, and 6, so prizes are still up for grabs!

EDIT 4

The contest is over and systests have been done. The winners are posted on DMOJ. Editorials will be out on their respective problem pages very soon.

Thanks for participating and see you next month!