Info and problems are available at https://adventofcode.com/2024
Each day's solutions are in a subdirectory, 01, 02, etc.
Solutions are C++. Compile with:
g++ -std=c++20 -Wall -g -o doit doit.cc
There are occasional problems that need something special; in that case a comment at the start of the file will say what to do.
Example inputs, if any, are called input1, input2, etc.
The real input, as downloaded from the AOC website, would be called
input, though my inputs are not included in the repository.
Input is on stdin, output is printed to stdout. Run part 1 as ./doit 1 < input and part 2 as ./doit 2 < input
Sometimes I might go back and revisit a problem in a different
(usually more efficient) way. Alternatives will be other .cc files
starting with doit.
Here's my list of recommended problems for the year, along with direct links. Recommendations are based on a combination of factors: perhaps the problem admits an unusual and clever solution, or perhaps it would allow an interesting visualization, or perhaps the problem description itself was cute. In whatever way, I found the problem unusually fun. Each of these problems is either ⭐ (recommended) or ⭐⭐ (highly recommended).
- Day 6: Guard Gallivant ⭐ Brute force works fine, but part 2 needs a little cleverness to be really fast
- Day 7: Bridge Repair ⭐
- Day 9: Disk Fragmenter ⭐
- Day 11: Plutonian Pebbles ⭐
- Day 12: Garden Groups ⭐ There's been a nice group of interesting days
- Day 14: Restroom Redoubt ⭐⭐ Wonderful part 2, though definitely a bit open-ended
- Day 17: Chronospatial Computer ⭐ Shades of Intcode
- Day 20: Race Condition ⭐⭐
- Day 21: Keypad Conundrum A spectacularly mind-bending problem, with an elegant solution! ⭐⭐
Overall I rate this year as somewhere between ⭐ and ⭐⭐. There was a very nice stretch of puzzles in the center, but I feel like the final few days were a slight letdown. Still, I enjoyed the look back at all the previous contests and eagerly await next year!
These are my AoC repositories for previous years (all C++, mostly the same format as this year). Years that I thought were more fun are rated with ⭐ or ⭐⭐.
- 2023 ⭐⭐
- 2022 ⭐⭐
- 2021 ⭐ You always remember your
first...
(This was the first year I participated live, and I did the solutions as two separate parts) - 2020
- 2019 Intcode FTW ⭐⭐
- 2018 ⭐⭐
- 2017 ⭐ for the advent calendar animation alone
- 2016 ⭐
- 2015
