There are plenty of problems on ProjectEuler

https://projecteuler.net/

With solutions in Picat

http://picat-lang.org/

By Mr. Hakan Kjellerstrand and Lei Chen

• http://hakank.org/picat/
• https://github.com/leichen007/projecteuler

Then why this repo?

Because I've been solving the problems independently and sometimes use a different approach which is interesting (not necessarily good). I'll mainly use Picat programming language with the help of pen and paper.