This is the repository for my Advent of Code 2019 solutions, written in C++17. Catch is used as the unit testing framework for the solutions and it is included as a git submodule, thus you need to clone the repository using the --recursive switch. Once you have cloned the repository along with it's submodules you can do a full build and testing the following way:

mkdir Build
cd Build
cmake ..
cmake --build .
ctest

Every project will be built in it's own directory, meaning that the first solution's first part will be under the Day1 folder as Day1_Part1.exe on Windows or as Day1_Part1 on Linux. It is important that every executable expects an input.txt put directly next to it, so if you move the executable file you should also move the input file along with it. I will try and add a short explanation under every directory that describes how I solve each problem.