Advent of Code in C

Testing all solutions on Linux, FreeBSD, OpenBSD and Windows/MinGW64. Target is to make the code platform independent which has turned out to be pretty difficult sometimes.

Possible to build using CMake. Builds with pre-defined custom targets for each day. To build run cmake -B build .

To run a specific day, for example Day 1 2021 run:

cd build
make run_2021_01

Or to run a specific year, for example 2021, run:

cd build
make run_2021

Replace make above with whatever build system you choose to use in CMake

2024 (Year of the plain C)

Day	Stars	Timing Part 1	Timing Part 2	Comment
1	⭐⭐			Pretty fun
2	⭐⭐			Probably not the most efficient...
3	⭐⭐			Plain C almost. Using regex
4	⭐⭐			Simpler solution but not faster
5	⭐⭐			Messy.
6	⭐⭐
12	⭐			Loop mania.
13	⭐⭐			Simple, yet nice
14	⭐⭐			Pretty nice

2023

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐
2	⭐⭐
3	⭐⭐
4	⭐⭐
6	⭐⭐
:---:	:-----------------	--------------:	--------------:

2022

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐	0.029 ms	0.009 ms
2	⭐⭐	0.004 ms	0.027 ms
3	⭐⭐
4	⭐⭐
5
6	⭐⭐	0.371 ms	0.678 ms
12	&#11088

2021

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐	0.029 ms	0.009 ms
2	⭐⭐
3	⭐⭐
4	⭐⭐
5	⭐⭐
6	⭐⭐
7	⭐⭐
8	⭐⭐
10	⭐⭐
18	⭐⭐

2020

Day	Stars	Timing Part 1	Timing Part 2	Comment
1	⭐⭐
2	⭐⭐
3	⭐⭐
4	⭐⭐
5	⭐⭐
6	⭐⭐
7	⭐⭐
8	⭐⭐
9	⭐⭐
10	⭐⭐
11	⭐⭐
12	⭐⭐
13	⭐⭐
14	⭐⭐
15	⭐⭐
16	⭐⭐
17	⭐⭐

2019

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐	0.029 ms	0.009 ms
2	⭐⭐	0.004 ms	0.027 ms
3	⭐⭐	0.881 ms	0.545 s
4	⭐⭐	0.016 s	0.016 s
5	⭐⭐
6	⭐⭐

2018:

Day	Stars	Timing Part 1	Timing Part 2	Comment
1	⭐⭐

2017:

Day	Stars	Timing Part 1	Timing Part 2	Comment
1	⭐⭐
2	⭐⭐
3	⭐⭐	0.266 ms	0.035 ms

2016

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐
2	⭐⭐
3	⭐⭐
5	⭐⭐
6	⭐⭐
7	⭐⭐
8	⭐⭐

2015

Day	Stars	Timing Part 1	Timing Part 2
1	⭐⭐	0.030 ms	0.009 ms
2	⭐⭐
3	⭐⭐
4	⭐⭐
5	⭐⭐
6	⭐⭐
11	⭐⭐