Solutions to Advent of Code problems in Haskell. Some problems have also been solved in other languages. All solutions are noted below.

Completion

	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025
ASM						2/25		1/25
Haskell	24/25	✓	✓	11/25	9/25	✓	✓	✓	12/25	20/25
Koka							3/25
Nix							1/25
ngn/k	3/25									2/25	5/12
------	------	------	------	------	------	------	------	------	------	------	------
Total	24/25	✓	✓	11/25	9/25	✓	✓	✓	12/25	20/25	5/12

Running the Code

Setting up the environment for a specific language, day and year is as simple as running ./aoc -l LANG DAY YEAR. Day is the only required value, the others default to hs (Haskell) and 2020 respectively.

$ # Haskell
$ ./aoc 23
Setting up day 23 (2020, hs)
Compile and run with:
  ghc -O2 run.hs && time ./run
$ ghc -V
The Glorious Glasgow Haskell Compilation System, version 8.8.4
$ exit
$ # ASM
$ ./aoc -l asm 23
Setting up day 23 (2020, asm)
Compile and run with:
  nasm -felf64 run.asm && ld -o run run.o && time ./run < input.txt
$ nasm -v
NASM version 2.14.02 compiled on Jan  1 1980

Language Completion

ASM

Solved:

• 2020, day 1
• 2020, day 23
• 2022, day 1

Haskell

Day \ Year	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025
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	✓	✓	✓			✓	✓	✓			-

ngn/k

Solved:

• 2015, day 1
• 2015, day 2
• 2015, day 3
• 2024, day 1
• 2024, day 2
• 2025, day 1
• 2025, day 3
• 2025, day 4
• 2025, day 6
• 2025, day 8

Koka

Solved:

• 2021, day 1
• 2021, day 2
• 2021, day 3

Nix

Solved:

• 2021, day 1