Advent of Code 2020 https://adventofcode.com/2020

My attempts to participate.

I've included my code solutions - so spoiler alert - if you go looking you will find code solutions. I am not sharing the puzzle data, only the sample data for the puzzles.

Notes

• Day 1: Great start, reading files, doing math. N cubed.
• Day 2: Basic string processing
• Day 3: Building the right in memory representation is key
• Day 4: Regex fun. Having the right debug statements helps a lot
• Day 5: Mapping results to internal bitmap
• Day 6: Python set functionality saves the day (overlap)
• Day 7: Parsing and recursion.
• Day 8: State machine.
• Day 9: Not really crypto.
• Day 10: Brute force won't work, need to use combinatorics
• Day 11: Game of life
• Day 12: Got stuck on part 2, needed to reference another solution
• Day 13
• Day 14: Bit masking fun.
• Day 15: Intresting performance trade off of data structure used
• Day 16: Dictionary abuse.
• Day 17:
• Day 18: Calculator. Easy if you pick the right bracket parsing approach
• Day 19
• Day 20
• Day 21: Fun with sets. Also, super messy code. Oh well.