[ncpc2021 intro] add event

Author: exoji2e

_events/2021-10-05-ncpc-intro.md

@@ -0,0 +1,20 @@
+---
+layout: event_small_title
+title: "Intro to NCPC 2021"
+place: "E:2106"
+timerange: "17:15 - 20:00"
+---
+
+The Nordic Collegiate Programming Contest ([NCPC](https://nordic.icpc.io/ncpc2021/)) will take place the 9th of October. It is basically the Nordic championships in competitve programming for university teams.
+
+To prepare, we will host a beginner friendly introduction lecture followed by a practice competition the 5th of October.
+
+The lecture will start at 17:15 and you will learn how the NCPC works, what kind of problems to expect, and see a demo where we solving a problem live.
+
+Between 18:00 and 20:00 the [practice contest](https://open.kattis.com/contests/seutao/standings) will be run at the online judge system Kattis, which also is used at NCPC. 
+
+If you have any questions about Kattis or NCPC, please jump into our [discord server](https://discord.gg/NpnXYj4), and ask. Just remember that during the real NCPC contest you are not allowed to communicate with anyone outside your team!
+
+Remember to register your team for NCPC, deadline: the 7th of October! 
+
+Find more info about NCPC at [https://codeatlth.org/ncpc2021/](/ncpc2021/)

_events/2021-10-09-ncpc.md

@@ -17,6 +17,9 @@ The [registration](https://icpc.global/regionals/finder/Nordic-2021) is open! Re
 
 Each team member needs an account in the [ICPC registration system](https://icpc.global/). However the team should only be registered once by one member.
 
+### Intro & Practice
+
+We are hosting an [intro lecture, and a practice contest](/events/2021-10-05-ncpc-intro/) the 5th of October to help you prepare for NCPC!
 
 ### Schedule of the on site event
 
@@ -93,3 +96,5 @@ The full rules can be found at the official [NCPC 2021 website](https://nordic.i
 ### Tips
 
 If you have not previously participated in NCPC a great way to prepare is to have a look at the [problems from last year](https://ncpc20.kattis.com/problems). Solve the problems ordered by how many people solved them during the contest - marked by green on the [scoreboard](https://ncpc20.kattis.com/standings). For example last year 192 teams solved problem M, but no teams solved problem L.
+
+If you wish to help spread the word about NCPC, please attend our [facebook event](https://www.facebook.com/events/334596451747366/), and invite your friends!