Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other.
Here you will find the solution arranged day wise. For practical purposes I have removed the input files as you can login to AoC and get your own input files.
Note - Your input files may differ from others. To add your own input files you will need to rename your input files to something like the following -
day1input.txt
The day can be incremented depending on the day you are working on. So for day 2 the file name will be day2input.txt and so on.