IPSC 2015 Announcements
- 2015-06-20 18:53:00 UTC
Correct outputs, checkers, and our programs have now been added to all the tasks
from this year. Everything is now available
on the main Archive page (click the contest name to
- 2015-06-20 16:09:00 UTC
The booklet with all
solutions has now been published. Correct outputs and our solutions will appear in
the Archive soon.
- 2015-06-20 16:05:00 UTC
Problem E: Two teams managed to match our 12-move solution.
The faster of those two teams and the amazing winner of the Cat Challenge
is team Stjupit Dox! Congratulations!
The second place goes to NIN Team who also submitted a 12-move
solution, approximately two and a half hours later than our winners.
Six other teams found a 14-move solution. The fastest of those was
the team Open Ports.
- 2015-06-20 16:03:00 UTC
Congratulations to team R+T+J for winning IPSC 2015, with a three
point lead to boot! Take a look at the Top 10 Teams as well.
We hope you had fun. See you next year!
- 2015-06-20 14:35:00 UTC
Problem H: In the example annotation, we had a typo: "and their difference is 0"
should obviously say "and their difference is 1". This is now fixed.
- 2015-06-20 13:20:00 UTC
Problem D: Graphs that contain negative cycles will be rejected by the grader.
This is consistent with the Python version of the reference implementation.
(The C++ version of the reference implementation will actually terminate on such graphs
because its long longs will eventually overflow. Please pretend that this does not
happen. ;) Thanks to Mykhailo Granik for pointing this out.)
- 2015-06-20 11:50:00 UTC
Large input files: If (and, pretty please, only if) you are unable to generate
the large input files for F, G, and I, you can download them
All three files have Linux end-of-line characters.
- 2015-06-20 11:20:00 UTC
Problem E: By our oversight, the package is missing the cat.png image
file that is needed by the Pygame visualizer. Sorry about that. The file is now
available on the problem set page. Download it (here) and place it
into the directory with the other files.
- 2015-06-20 09:45:00 UTC
You can now download encrypted archives for
will be published when the contest starts.
- 2015-06-20 09:37:00 UTC
We also wanted to remind you that you should install the Pygame library if possible.
A test program is also included in the package below.
- 2015-06-20 09:05:00 UTC
The practice session is now over. As usual, the practice problems were far from trivial.
Congratulations to the 53 teams who managed to solve everything, and especially to the
team "Semi-professional" who had the smallest time penalty.
The real contest will start in two hours. In the meantime, you can
read the solutions for the practice
session. Also, please make sure you have a working Python 2 installation.
(See an older announcement for instructions.)
- 2015-06-19 11:30:00 UTC
Thank you for all the lovely postcards! All postcards we received have now been entered
into the database, except for one team that didn't register yet.
- 2015-06-19 11:07:00 UTC
In problem U, the contestant does know the probability p.
On the other hand, when she plays the game she doesn't know whether Monty is tired for that specific game.
- 2015-06-19 07:59:00 UTC
The practice session will start in an hour. Should you have any questions or
clarification requests, e-mail them to firstname.lastname@example.org. Alternately, you may
use any instant messaging client that supports XMPP to talk to us at
email@example.com whenever the account is online – which will certainly
be during the beginning of the practice session and also during the entire
The postcards we received will be entered into the database later today,
during the practice session.
- 2015-06-19 00:13:00 UTC
During IPSC 2015 you will need a working installation of Python 2.
Please download this package
and follow the instructions in README.pdf to make sure everything works.