Advent of Code 2020 Directory - All 25 Days Kotlin solutions to Advent of Code 2020 Posted on 2020-12-25 by Todd Ginsberg Below you will find all my Kotlin solutions to Advent of Code 2020 . Full solutions, along with tests are located in my GitHub repo ! There is also an index for all of the 2017 , 2018 , 2019 , and 2021 solutions in Kotlin as well! 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25