Advent of Code Solutions

Introduction

This repo has solutions to the Advent of Code online coding problems. It solves all historical problems and will be updated to solve new ones as they are released.

The solutions are written for combined development and execution speed (i.e. to minimize the total time from when I start reading the problem to when I have submitted the correct answer) and are therefore not up to the highest standards of excellence stylistically.

Utilities

Data

Variable	Purpose
dt	raw data
ls	lines
l	line
ss	sections
sm(…)	submit

Processing

Variable	Purpose
pa(l, pt+)	pattern match, e.g. pa(l, "valve {} has flow rate={i}")
gr(ls, fn?)	gridify lines, optionally postprocessing each character
cngr(es, tgs)	condense graph from (edge_map: {T, {T, int}}, targets: [T]) -> {T, {T, int}}

Other

• Assembly
• Search
• Timer

Project Structure

• aoc.py utility for standard imports
• assembly.py utility for assembly problems
• search.py utility for search problems
• timer.py utility for timing a process
• web.py utility for interacting with the website
• prototype a directory to copy and rename for a new problem
• [year] a year
  • [day] a day of december
    • sln.py the solution file
    • inp.txt the input from the specific problem; optional if the input data is in solution file

Yearly Setup

Set the AOC_SESSION environment variable by following the following steps in Chrome

1. Login to AOC online
2. Right click > Inspect > Application > Cookies > https://adventofcode.com/
3. Copy the value of the session cookie to the AOC_SESSION environment variable

Execution

Run a given solution with

cd ./[year]/[day]
./sln.py

Next Steps

• Simplify imports so root doesn't have to be in PYTHONPATH
• Centralize 100% of imports into aoc.py and replace all imports
• Fix TODOs
• Migrate all problems to use web.py
• Migrate all search problems to use search.py
• Identify and improve other common patterns
• Translate text like in 2021-13 and elsewhere to a submission
• Improve types and naming of common stuff