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Nordic Collegiate Programming Contest 2020

07 Nov 2020 - E:B LTH

10:15 - 17:00

The Nordic Collegiate Programming Contest (NCPC) is the Nordic Championships in Competitive programming in teams for university students. Both student teams and professional teams are welcome to participate.

This year it is possible to participate online, but [email protected] will host an on site event for the competition.

Update: we will host an intro lecture and practice contest the 3rd of November!


Register your 3 member team before the 4th of November.

Each team member needs an account in the ICPC registration system. However the team should only be registered once by one member.

After you have registered in the contest system please fill in this form - to let us know if you are coming to the on site event or if you are participating online. We need this information due to Covid-19. If more than 50 people signs up to participate on site we might hold parallel info sessions.

If you wish to help us spread the word about the contest, please select “Going” at our Facebook event - and invite your friends!

Schedule of the on site event

7th November.

Time Place  
10:15 - 10:30 E:B Information session - Please be there on time
11:00 - 16:00 E-house The contest
16:00 - 17:00 E:B Solution session and Prize Ceremony

About NCPC

NCPC is an annual 5 hour contest where your team are given 8-13 algorithmic problems to solve.

The problems vary greatly in difficulty, from beginner level to extremely hard.

Solve each problem by:

  • Writing a program in one of the supported programming languages
  • Test it locally on your computer with the sample test cases
  • Submit it to the online judge system Kattis.
  • Wait for the results on the secret test cases.

Kattis will tell you if your program:

  • Was Correct (Accepted)
  • Produced the wrong output (Wrong Answer)
  • Ran too slow (Time Limit Exceeded)
  • Crashed (Run Time Error)

If you submit a program which is not correct, but you later in the contest solve the problem, you receive some penalty time for the incorrect attempt.

At LTH this contest is used as the qualifier for the regional contest NWERC. The top student teams that are ICPC-eligible will advance to NWERC.

The contest was created in Lund in 1991 by Roy Andersson at the depatrment of Computer Science at Lund University, and has since been organised yearly. In 1996 it became the Swedish Championships, and in 2011 it became the Nordic Champinships. At http://http://cs.lth.se/contest/ information, images and previous scoreboards are archived.


Due to Covid-19 the rules have changed since previous years. In short:

  • A team consists of 1 - 3 team members
  • You participate on your own computers - from home or on site.
  • You are allowed you use the internet during the contest
  • You are not allowed to ask anyone outside your team for help. It is also forbidden to put up questions on forums or in chat groups.
  • Your team is ranked by the number of problems you solve, and then by penalty time.

Your team is ICPC-eligible (can compete in the student contest) if all team members fulfills the following criteria:

  • Born in 1997 or later
  • Started studying at Lund University 2016 or later
  • Is still enrolled at Lund University.

If these criteria does not hold for all team members, your team instead participate in the open contest.

The full rules can be found at the official NCPC 2020 website.


If you have not previously participated in NCPC a great way to prepare is to have a look at the problems from last year. Solve the problems ordered by how many people solved them during the contest - marked by green on the scoreboard. For example last year over 200 teams solved problem H, but no teams solved problem D.

We plan to hold a practice session in the beginning of November. This page will be update with more details about that shortly.

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