Advent of Code 2021 Directory - All 25 Days Kotlin solutions to Advent of Code 2021 Posted on 2021-12-01 by Todd Ginsberg Below you will find all my Kotlin solutions to Advent of Code 2021. Full solutions, along with tests are located in my GitHub repo! There is also an index for all of the 2017, 2018, 2019, and 2020 solutions in Kotlin as well! 1 2 3 4 5 6 7 8 9 10 11 12 13 13 15 16 17 18 19 20 21 22 23 24 25