View source for Codegolf/RGB2Rv18

= RGB2Rv18 Codegolf =

To participate in this years codegolf challenges, you need to be in the rgb2r wifi and SSH into a special machine:

<code>ssh <username>@golf</code>

When you first connect, your user will be automatically created and your public key authorized for that user. It is not possible to connect without a public key (i.e. there is no password auth). Once you are connected, you can run the <code>golf</code> command to see the existing challenges, submit solutions, see the leaderboards and get further information. After the event, I will copy all the relevant information here.


== Leaderboard ==

{|
|+
|Bash
|C
|C++
|Go
|Java
|Perl
|Python 2.7
|Python 3
|Ruby
|-
|54 koebi
|205 nicolas
|228 nicolas
|319 supaake
|292 sarge
|52 secure
|159 nicolas
|160 nicolas
|73 xeen
|-
|56 xeen
|335 mero
|267 supaake
|360 mero
|340 empire
|57 mxf
|
|172 emrys-merlin
|-
|62 nicolas
|
|455 judge
|
|
|
|
|174 koebi
|-
|97 supaake
|
|
|
|
|
|
|194 supaake
|}


== FAQ ==

=== Lol, it's so easy to cheat or break this ===

It is <em>definitely</em> possible and <em>likely</em> easy to cheat and/or break the raspberry pi we use. That means that if you <em>do</em> cheat or intentionally break stuff in a way that spoils the fun for others, the only thing you prove is that you're a buzzkill - not that you are clever. Please keep that in mind :)

=== How do I use the commands correctly? ===

 
 scp foo.py <user>@golf:
 golf -challenge <challenge> foo.py

=== I have a great idea for a challenge ===

Query sECuRE in IRC. If you want to make the job extra easy, you can implement this Go interface:

 type Instance struct {
     Input string
     Want  string
 }
 
 type Challenge interface {
     // GenerateInstance generates a random instance, using the given RNG.
     GenerateInstance(*rand.Rand) Instance
     // Solve solves a given instance.
     Solve(input string) string
     // Description outputs a verbose description of the problem to solve.
     Description() string
     // Examples generates a fixed list of examples for documentation.
     Examples() []Instance
 }

=== What languages are supported? ===

There currently is a hardcoded list of languages (for uniformity), containing Brainfuck, C, C++, Go, Haskell, Java, Javascript, Julia, Perl and Python. What language to use is determined on file-extension. If you want to use a different language, you can query sECuRE a) what debian-packages are needed, b) how to build (if needed) programs for that language and c) how to run programs for that language. If you want to use a language that can't run on an ARM64 Raspberry Pi3 (e.g. if you want to code on a Commodore 64 or an Atari ;) ), let me know, but we won't be able to have you in the leaderboards :)

=== I get some weird behavior when using ssh ===

Please file a bug against [https://github.com/Merovius/simsim simsim]. In the meantime, there is an OpenSSH sshd running on port 2222 that you can use via <code>ssh -p 2222 <user>@golf</code> or <code>scp -P 2222 <user>@golf</code>. User creation, however, only works on port 22, so you need to use that at least once.