Can you solve algorithmic programming challenges, efficiently and correctly, in practice, as a team, under time pressure?


The contest is now over! Many thanks to all participants, and congratulations to the winners!

You can find photos from the event on Storify, or you can check the hashtag #HIITopen on Twitter.

If you missed the contest: there is a virtual online contest with the same problem set. The contest takes 5 hours, and you can start it whenever you want.



Game of Nolife — solved 9/12 tasks:


Ace of Spades — solved 8/12 tasks, total time 594 minutes:


Noname 01 — solved 8/12 tasks, total time 951 minutes:



Time & Place

The contest takes place on Saturday, 28 May 2016 in the Computer Science building, Konemiehentie 2, Espoo.


Please arrive by 10:30.


The contest is open to everyone, including university students, high-school students, university researchers, and teams from companies.

We will mostly follow the same rules as in the NCPC. In brief:

Submission system

The CSES contest system will be used in HIIT Open 2016. The system automatically evaluates the solutions submitted for the tasks.

You can test the contest system beforehand at At the moment, there is a practice contest running with some old tasks.

The submission system supports the following languages and compilers:

However, please note that there is no guarantee that e.g. Python or Scala implementations can be made efficient enough to solve all tasks — all languages have the same time limits, and they are chosen based on the performance of a reasonably efficient C++ implementation.


We will use normal Linux computers, which will have the following programming tools installed:


There is no registration fee — the event is made possible with support from HIIT and Aalto University.

Registration has been closed now, and unfortunately we do cannot accept more participants any more at this point.


We have got 13 teams participating in the contest:

Our participants come from at least 6 different universities or universities of applied sciences and 3 different high schools, and we have also participants from the industry.