All years of Advent of Code - all code here is my own except where explicitly cited
Primarily in Kotlin IntelliJ projects with a few in Python - most should run out of the box if the inputs are correctly added to the input folder of the project as inputs.txt
For a few of the years I have a README in the subdirectory for the year with a recap and analysis of my favorite problems
To use KotlinUtils/utils.kt go to Project Structure -> Project Settings -> Modules -> Add Content Root -> Then mark as Sources