adventofcode_2024

All AoC 2024 solutions.

This is the new CBL repo with the revised AoC code 2024. I've added a few solution variants to my code based on discussions and some very clever ideas on Reddit - thanks to Eric and everyone else for this year!

(This is a new GitHub account, AoC 2024 has been done as 'Rowlf'.)

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Characterise problems and solutions in terms of programming language features and algorithmic requirements, with a view to learning a new language.

All solutions involve reading data from a text file 'input.txt' and string manipulation. More typical ingredients are (data) classes to model small pieces of data with some properties, and typical collections such as lists/arrays, sets and maps. Tasks with 2D grid data use 2D arrays and, if modelled with classes, may also use indexes and operators.

2024

Day 01 Historian Hysteria

• data '3 4'
• extract numbers, string manipulation, maybe regular expressions
• easy

Day 02 Red-Nosed Reports

• data '7 6 4 2 1'
• lists
• easy

Day 03 Mull It Over

• data 'xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))'
• regular expressions
• easy

Day 04 Ceres Search

• grid data 'MMMSXXMASM'
• (2d)arrays, classes, index-manipulations
• easy

Day 05 Print Queue

• data '47|53 // 97|13 // 75,47,61,53,29'
• maps
• easy

Day 06 Guard Gallivant

• grid data '....#.....'
• (2d)arrays, index-manipulations, math (graph)
• easy/medium

Day 07 Bridge Repair

• data '190: 10 19'
• classes, enums
• easy/medium (idea)

Day 08 Resonant Collinearity

• grid data '........A...'
• (2d)arrays, index-manipulations
• easy

Day 09 Disk Fragmenter

• data '2333133121414131402'
• classes
• easy/medium (complexity)

Day 10 Hoof It

• grid data '...2... // 6543456'
• (2d)arrays, index-manipulations, math (graph)
• easy

Day 11 Plutonian Pebbles

• data '0 1 10 99 999'
• maps
• easy

Day 12 Garden Groups

• grid data 'AAAA // BBCD'
• (2d)arrays, index-manipulations, classes, math (graph)
• medium (part 1)/hard (part 2)

Day 13 Claw Contraption

• data 'Button B: X+22, Y+67 // Prize: X=8400, Y=5400'
• classes, math (lin.algebra)
• easy

Day 14 Restroom Redoubt

• data 'p=0,4 v=3,-3'
• (2d)arrays, index-manipulations, classes
• medium (complexity)

Day 15 Warehouse Woes

• grid data '##@.O..#'
• (2d)arrays, index-manipulations
• hard (complexity)

Day 16 Reindeer Maze

• grid data '#.#.###.#.###.#'
• (2d)arrays, index-manipulations, math (graph)
• medium (graph)

Day 17 Chronospatial Computer

• data 'Register C: 0 // Program: 0,1,5,4,3,0'
• classes, long numbers
• easy/medium

Day 18 RAM Run

• data '5,4 // 4,2'
• math (graph)
• medium (idea)

Day 19 Linen Layout

• data 'r, wr, b, g, bwu, rb, gb, br // brwrr'
• algo (dynamic programming)
• medium/hard (idea)

Day 20 Race Condition

• grid data '#.#.#.#.#.###.#'
• (2d)arrays, index-manipulations, math (graph)
• medium/hard

Day 21 Keypad Conundrum

• data '029A // 980A'
• algo (dynamic programming)
• hard (idea)

Day 22 Monkey Market

• data '1 // 10 // 100 // 2024'
• maps, long numbers
• medium (task description)

Day 23 LAN Party

• data 'kh-tc // qp-kh'
• maps, math (graph)
• medium/hard (graph)

Day 24 Crossed Wires

• data 'y02: 0 // x00 AND y00 -> z00'
• maps, classes
• easy (part 1), devil (part 2, idea)

Day 25 Code Chronicle

• grid data '.#.#.'
• maps
• easy