I really enjoy programming puzzles and recently I discovered Advent Of Code thanks to a colleague.

Quoting its creator:

Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.

It happens every year since 2015. I started 2020 using my favourite Kotlin.

I plan to do the previous years too, preferably using other languages (Swift is next).

I will upload all solutions on github.