Advent of Code 2020 Solution

Will be doing in Python 3 only (and Javascript if I have time).

https://adventofcode.com/2020

Preparing

1. Get session cookies for your Advent of Code input data.
2. Run prepare_day.py when the next day unlock (using UTC+7 as it base)
3. It will generate new folder on src with .js and .py solution file.