I think the Advent of Code (https://www.adventofcode.com) is a great Advent calendar. But some of the puzzles are rather more difficult, and I don't have time to do them every day, so there are still a few puzzles left unsolved. I think many of you feel the same way.
This is an invitation to meet and crack the last puzzles together. It's always more fun together.
I have solved my puzzles in Kotlin and can also provide support for Java, Python, Dart and JavaScript.
Please bring your own laptops.
Disclaimer: I am not affiliated in any way with AdventOfCode.com