Advent of Code 2021

My solutions to the Advent of Code 2021 using Python.

Day	Code	Stars
1	advent_of_code/challenges/day01.py	⭐️⭐️
2	advent_of_code/challenges/day02.py	⭐️⭐️
3	advent_of_code/challenges/day03.py	⭐️⭐️
4	advent_of_code/challenges/day04.py	⭐️⭐️
5	advent_of_code/challenges/day05.py	⭐️⭐️
6	advent_of_code/challenges/day06.py	⭐️⭐️
7	advent_of_code/challenges/day07.py	⭐️⭐️
8	advent_of_code/challenges/day08.py	⭐️⭐️
9	advent_of_code/challenges/day09.py	⭐️⭐️
10	advent_of_code/challenges/day10.py	⭐️⭐️
11	advent_of_code/challenges/day11.py	⭐️⭐️
12	advent_of_code/challenges/day12.py	⭐️⭐️
13	advent_of_code/challenges/day13.py	⭐️⭐️
14	advent_of_code/challenges/day14.py	⭐️⭐️
15	advent_of_code/challenges/day15.py	⭐️⭐️
16	advent_of_code/challenges/day16.py	⭐️⭐️
17	advent_of_code/challenges/day17.py	⭐️⭐️
18	advent_of_code/challenges/day18.py	⭐️⭐️
19	advent_of_code/challenges/day19.py	⭐️⭐️
20	advent_of_code/challenges/day20.py	⭐️⭐️
21	advent_of_code/challenges/day21.py	⭐️⭐️
22	advent_of_code/challenges/day22.py	⭐️⭐️
23	advent_of_code/challenges/day23.py	⭐️

Help

I do my best to solve these puzzle on my own, but I do have a job and other responsibilities. So if a puzzle takes too long, I will find help from others working on Advent of Code 2021. Below are the attributions to these other programmers.

1. I received help on part 2 of day 14 from kresimir-lukin.
2. I received help on day 20 from fridokus.

Visualizations

Day 17

Day 20

Details

Installation

This project can be installed as a Python package using pip. Once it is installed, the code for the challenges can be executed using the CLI command as demonstrated later.

# pyenv local 3.9.9
python3 -m venv .env # or `pyenv exec python3 -m venv .env`
pip install --upgrade pip
pip install git+https://github.com/jhrcook/advent-of-code_2021.git

Development setup

The steps to setting up the development version of this project are shown below.

pyenv local 3.9.9
pyenv exec python3 -m venv .env
source .env/bin/activate
pip install --upgrade pip
pip install flit
flit install

Run the challenges

It is possible to run the code for a single day's challenge as demonstrated:

aoc21 --day 1
#> Day 1 part 1 answer: 1226
#> Day 1 part 2 answer: 1252

If no day is supplied as input, then the code for all of the challenges is executed in order.

aoc21
#> Day 1 part 1 answer: 1226
#> Day 1 part 2 answer: 1252
#> Day 2 part 1 answer: 1507611
#> ...

Alternatively, if you have the development system setup, you can use [tox]https://tox.wiki).

tox
#> .package recreate: /Users/admin/Developer/Python/advent-of-code_2021/.tox/.package
#> .package installdeps: flit_core >=3.2,<4
#> ...

Organization

This repository is actually a Python package with all of the code in the advent_of_code directory. Within there, all of the challenges are in the advent_of_code/challenges sub-module where are day has a separate file. Each of these "day"s can be run by Python to complete the challenge.