Advent of Code Solutions 🎄

My solutions to puzzles at adventofcode.com. Also check out my collected tricks.

                                      `}-'       `}-'
 ___                    `}-' `}-'  ____/`-,  _____/`-,
"-_/}__             `}-'_/`-, /`-,( _,,.{-,_(__,,,.(
  [(_.-'`--,__   ____/`-,.(,-`}-'_,>___\/`-, >|`---\
  [(__\___\  _`-(--...(..-'_`./`-,/(--,,.(  //    / >
  |_______/-'    >`---\ / (   `{    >`---\ 
  __|___|__)    / \  / \  /`--/<   / \   /|
                         /  \/  \

See also:

• erikw/hackerrank-solutions
• erikw/kattis-solutions
• erikw/leetcode-solutions
• erikw/project-euler-solutions

2022 Results

Day	Part 1	Part 2
Day 1	⭐	⭐
Day 2	⭐	⭐
Day 3	⭐	⭐
Day 4	⭐	⭐
Day 5	⭐	⭐
Day 6	⭐	⭐
Day 7	⭐	⭐
Day 8	⭐	⭐
Day 9	⭐	⭐
Day 10	⭐	⭐
Day 11	⭐	⭐
Day 12	⭐	⭐
Day 13	⭐	⭐
Day 14	⭐	⭐
Day 15	⭐	⭐

Development Setup

Env: Ruby

brew bundle install
bundle install

Env: JavaScript

npm install

Solve puzzle

and now solve today's puzzle or a specific one

bin/solve_day.sh
bin/solve_day.sh 19/5  # 2019 day 5
bin/solve_day.sh -l rb # Solve with language, here ruby 

Session Cookie Expired?

Update:

• AOC_SESSION in local .env
• AOC_SESSION at Action Secret for .github/workflows/readme-stars.yml
• SESSION at Vercel Envvar for stackcats/adventofcode-badge
  • Then redeploy to restart the service.