Change structs to modules

Split solutions into modules

Update README.md

Split day1 solutions into two parts

Add day2 solutions

Update variable name for readability

Remove unnecessary temporary variable :)

Add multiple days support

Fix comments

WIP: (Q) the second part of day1

Add a solution of the first part of day1 in q

Update day1 for the part two

Fix the default target

Add day1

Update README.md

Add LICENSE file

Initial commit