advent of code

Advent of Code 2023 day 08

A reverse-engineering puzzle, not my favourite type.

advent of code

Advent of Code 2023 day 07

Explicit data types save the day.

advent of code

Advent of Code 2023 day 06

A day where you really don't need to overthink things.

advent of code

Advent of Code 2023 day 05

Brute force almost works, but a different representation pays off.

advent of code

Applicative cubes: back to AoC 2023 day 2

Rebuilding a solution with more typeclass fun.

advent of code

Advent of Code 2023 day 04

A puzzle that rewards a little bit of thought about what's actually important

advent of code

Advent of Code 2023 day 03

A lot of scaffolding to get where I wanted to be.

advent of code

Advent of Code 2023 day 02

Declarative code and fun with monoids!

advent of code

Advent of Code 2023 day 01

The importance of comprehensive examples.

python

Optimising riddle generation

Optimising riddle generation, trading space for time, then exploring something like laziness

python

Generating riddles

How to generate the riddles I solved in the last post.

python

Solving riddles

A worked example of how to solve word-guessing riddles

advent of code

Optimising Haskell, example 4

Another example where changing the representation gives a huge speedup. Plus some actual Haskell optimisation as a bonus!

advent of code

Optimising Haskell, example 3

Optimising Haskell programs, mainly by changing the algorithm used.

advent of code

Optimising Haskell, example 2

Using mutable arrays instead of sets

advent of code

Optimising Haskell, example 1

A short case study in optimising a Haskell program

Advent of Code 2022 fan bonus

As a quick bonus, user MBoffin on Reddit posted about a bonus puzzle their daughter made. It seemed like a good fit for Haskell, so I decided to have a

advent of code

Advent of Code 2022 review

A review of my experiences with Advent of Code 2022

advent of code

Advent of Code 2022 day 25

A most odd conversion.

advent of code

Advent of Code 2022 day 24

A search that didn't take too long!

advent of code

Advent of Code 2022 day 23

Use of a raw State monad, and a first use of profiling

advent of code

Advent of Code 2022 day 22

Functions inside readers: there must be a better way. And, lenses start becoming useful!

advent of code

Advent of Code 2022 day 21

Playing with indexed lenses, and binary search

advent of code

Advent of Code 2022 day 20

Modular arithmetic and off-by-one.

advent of code

Advent of Code 2022 day 19

Taking too long, and parallelism not working.