adventofcode2020 VS aoc2021

I don't use a lot of things besides the STL, but I do like to mess around and roll out my own iterators to implement some algorithms. One or twice, I've used yacc/bison for parsing purposes. So, I don't know if it helps but if you want to have a look: https://github.com/lgeorget/adventofcode2020, https://github.com/lgeorget/adventofcode2021, etc.

The fiddliest part is processing the input into usable form. I ended up with a template which used regex to convert a file of similar lines into a vector of tuples. It's not amazing code, I'm sure, but it did the job: https://github.com/UnicycleBloke/aoc2021/blob/master/utils/utils.h, used for example here in the run() function: https://github.com/UnicycleBloke/aoc2021/blob/master/day13/day13.cpp. Share and enjoy. ;)

I'm not certain, but this seems similar to my solution: https://github.com/UnicycleBloke/aoc2021/blob/master/day06/day06.cpp. I rotate an array of counts for days, and add the count for Day 8 to that for Day 6. Speed depends on the machine, but both parts run in about a millisecond on mine.

My code isn't amazing or anything, but it is here: https://github.com/UnicycleBloke/aoc2021

C++: https://github.com/UnicycleBloke/aoc2021/blob/master/day05/day05.cpp

C++ https://github.com/UnicycleBloke/aoc2021/blob/master/day03/day03.cpp. I suspect I'm overdoing the template-y goodness, but it's a learning exercise. Made such a meal of Part 2...

Nice. I figured we'll be parsing lines a lot so have written a function to parse the input into a vector of tuples: https://github.com/UnicycleBloke/aoc2021/blob/master/day02/day02.cpp.