Just my thoughts on solving Advent of Code 2015 in Java / Kotlin.
See https://adventofcode.com/2015 for the puzzle descriptions.
I tried to do it with intuitive approaches and without going too deep into math and complex algorithms. My focus was on having fun, not producing production grade code 😁
I hadn't used Java for quite some time and it was fun exploring it after some time - but also reminded me why I use C# on a day to day basis 😅 Kotlin was a new language for me, but it's easy to learn and really a great Java replacement on the JVM. I liked it a lot despite its syntax being a bit further away from my preferred C/C# style.
My inputs are not included (for reference see https://adventofcode.com/about -> If you're posting a code repository somewhere, please don't include parts of Advent of Code like the puzzle text or your inputs.)