Implement Welsh Powell algorithm

[shadowsaber16]

Implement welshPowellAlgorithm in a language of your choice.

Please read the contributing guidelines in CONTRIBUTING.md

Languages claimed/implemented:

• C
• C++
• Java
• Python
• Any other language

[codelixir]

You can go ahead! I've assigned the issue to you, you can now make a PR.

[LathikaDevraj]

Can I claim the implementation of the algorithm in Java?

[codelixir]

Yes, @LathikaDevraj, you can go ahead!

[codelixir]

Closed #237 for python. Thanks, @shadowsaber16!

[etzl]

I want to work on c++ implementation. Should I use a graph library? Or can I use stdout to show the result?

[codelixir]

I want to work on c++ implementation. Should I use a graph library? Or can I use stdout to show the result?

Hey @etzl, stdout would be enough, but if you are interested in showing the output as a graph, that would be cool too!

[etzl]

@codelixir Ok, thanks I'm working on it