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#advent_of_code

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andioop

Appreciation for Advent of Code

programming.dev/post/29465480

programming.devAppreciation for Advent of Code - programming.devI know I’m not going to be a leaderboard type, especially given my schedule around the holiday seasons. So I take my time and read the whole problem, including the flavor text, and I have to say I appreciate it! Nice and festive, it’s the little things that make this seem more like a fun programming puzzle exercise I actively want to do as recreation, and less like a dry exercise to force myself to learn a new language or library. But it still facilitates me doing those two things anyways. The flavor text, along with the ASCII art that gets colored in each day I star, helps it feel like a festive thing too—so I don’t feel like I’m being a Grinch doing these puzzles during the holiday season. I also appreciate the problems staying up after Advent for people using them off-season ;)
#advent_of_code
Alavi | علوی

I just completed day 1 of #AoC 2024, I know, I'm late to the party but I am learning #clojure so thought I would learn better if I did something with it.

I will be uploading my solutions to github as I go forward, And I will probably be using multiple languages to solve the puzzles, to get better practice with different langs and also compare them.

github.com/alirezaalavi87/adve

GitHubGitHub - alirezaalavi87/advent-of-code: my solutions for solving advent-of-code puzzles. The solutions might be impemented in various languages.my solutions for solving advent-of-code puzzles. The solutions might be impemented in various languages. - alirezaalavi87/advent-of-code
#advent_of_code#AdventOfCode
Alavi | علوی

@ericwastl
Hi Eric, We all love AoC and thank you for it.

I got two main issues with it though.
Why is there a mandatory github/google/reddit login? These are all very privacy hostile platforms, so it means someone who cares about their privacy can't enjoy AoC. Couldn't there be a more privacy friendly option for login?

And why is #reddit the recommended place to ask for help, while reddit is heavily guarded and closed? I don't have a reddit account and using it seems impossible in the last year or so, as it doesn't allow users without accounts to even view posts. I am simply not able to view anything from reddit.
Can you please instead recommend #lemmy for the AoC community? It's open, and everyone can see the guidance and posts in there without a "firewall" or login needed.

#aoc#advent_of_code
somegeek

why should we sort 2024-day1 ?

programming.dev/post/27315043

programming.devwhy should we sort 2024-day1 ? - programming.devHi guys. I just did day1 of 2024 (I know, I’m late) this might be a dumb question but I reallydont understand why we should sort the two lists before substracting? I created some test cases with 10-20 items and calculated them manually, if you don’t sort the list and just add all list1 items and substract from the sum of list2, you get the same answer. But it doesn’t work with the large input file. Let’s say list1 has elements (a,b,c,d) and list2 has (e,f,g,h). (a-e)+(b-f)+(c-g)+(d-h) = a-e+b-f+c-g+d-h = (a+b+c+d)-(e+f+g+h) So the sorting shouldn’t matter. Right? But it does. Am I too bad at basic math?
#advent_of_code
abbadon420

I'm looking for a list of all the puzzles and which programming topics they teach, does anyone know of such a list? Or else, can anyone offer a complete repository of python implementations?

programming.dev/post/24386736

programming.devI'm looking for a list of all the puzzles and which programming topics they teach, does anyone know of such a list? Or else, can anyone offer a complete repository of python implementations? - programming.devI’m looking for something like this (these are not correct, just an example for what I’m looking for): - 2021 - day 1: Dijkstra Algorithm - 2021 - day 2: Dynamic Programming - 2021 - day 3: Time efficiency, Hash tables - etc If there is no such thing, does anyone have a (fairly) complete (github) repository of python implementations from which I can build such a list myself? I would make all the puzzles myself, but I’m not that fast, I’m currently still on day 15 of 2024.
#advent_of_code
morrowind

Is it possible to not brute force day 7?

lemmy.ml/post/23705383

lemmy.mlIs it possible to not brute force day 7? - LemmyI thought about it for 15 mins, but couldn’t think of any mathematical tricks. I thought of lots of minor tricks, like comparing the number to the result and not adding any more multiplications if it’s over, things that would cut 10%-20% here and there, but nothing which fundamentally changes big O running time. For reference, here’s my solution for part 2 in smalltalk. I just generated every possible permutation and tested it. Part 1 is similar, mainly I just used bit magic to avoid generating permutations. (even if you haven’t used it, smalltalk is fairly readable, everything is left to right, except in parens) smalltalk day7p2: in | input | input := in lines collect: [ :l | (l splitOn: '\:|\s' asRegex) reject: #isEmpty thenCollect: #asInteger ]. ^ (input select: [ :line | (#(1 2 3) permutationsWithRepetitionsOfSize: line size - 2) anySatisfy: [ :num | (self d7addmulcat: line ops: num) = (line at: 1)] ]) sum: #first. smalltalk d7addmulcat: nums ops: ops | final | final := nums at: 2. ops withIndexDo: [ :op :i | op = 1 ifTrue: [ final := final * (nums at: i + 2) ]. op = 2 ifTrue: [ final := final + (nums at: i + 2) ]. op = 3 ifTrue: [ final := (final asString, (nums at: i+2) asString) asInteger ] ]. ^ final
#advent_of_code
Habr

SQL HowTo: агрегация внутри рекурсии (Advent of Code 2024, Day 11: Plutonian Pebbles)

Сегодня посмотрим на примере задачки из Advent of Code зачем и как можно обойти ошибку aggregate functions are not allowed in a recursive query's recursive term , возникающую при попытке агрегировать какие-то данные внутри шага рекурсии на PostgreSQL - "если нельзя, но очень хочется, то можно" .

habr.com/ru/companies/tensor/a

ХабрSQL HowTo: агрегация внутри рекурсии (Advent of Code 2024, Day 11: Plutonian Pebbles)Сегодня посмотрим на примере задачки из Advent of Code зачем и как можно обойти ошибку aggregate functions are not allowed in a recursive query's recursive term , возникающую при попытке агрегировать...
#postgresql#sql#sql_tips_and_tricks
CameronDev

🌻 - 2024 DAY 12 SOLUTIONS -🌻

programming.dev/post/22749375

programming.dev🌻 - 2024 DAY 12 SOLUTIONS -🌻 - programming.dev# Day 12: Garden Groups ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

🪐 - 2024 DAY 11 SOLUTIONS -🪐

programming.dev/post/22710192

programming.dev🪐 - 2024 DAY 11 SOLUTIONS -🪐 - programming.dev# Day 11: Plutonian Pebbles ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

🐮 - 2024 DAY 10 SOLUTIONS - 🐮

programming.dev/post/22672699

programming.dev🐮 - 2024 DAY 10 SOLUTIONS - 🐮 - programming.dev# Day 10: Hoof It ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
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CameronDev

💿 - 2024 DAY 9 SOLUTIONS -💿

programming.dev/post/22635267

programming.dev💿 - 2024 DAY 9 SOLUTIONS -💿 - programming.dev# Day 9: Disk Fragmenter ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

🛜 - 2024 DAY 8 SOLUTIONS -🛜

programming.dev/post/22596237

programming.dev🛜 - 2024 DAY 8 SOLUTIONS -🛜 - programming.dev# Day 8: Resonant Collinearity ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
bugsmith

[2024 Day 06] Any Gleamings in the house?

programming.dev/post/22574694

programming.dev[2024 Day 06] Any Gleamings in the house? - programming.devI’m running behind as usual. I’m still rather new to Gleam and would love some feedback on how I handled the Day 06 puzzle: gleam import gleam/dict import gleam/io import gleam/list import gleam/option.{None, Some} import gleam/result import gleam/set.{type Set} import gleam/string import simplifile pub type Point = #(Int, Int) pub type Grid(a) = dict.Dict(Point, a) pub type Direction { North East South West } pub type Loops { DoesLoop DoesNotLoop } pub type Guard { Guard(position: Point, direction: Direction) } fn get_guard(grid: Grid(String)) -> Guard { let pos = dict.filter(grid, fn(_pos, char) { char == "^" }) let assert Ok(pos) = case dict.size(pos) { 1 -> list.first(dict.keys(pos)) 0 -> panic as "No guard found in input!" _ -> panic as "More than one guard found in input!" } Guard(pos, North) } fn move_guard(guard: Guard) -> Guard { let new_pos = case guard.direction { North -> #(-1, 0) East -> #(0, 1) South -> #(1, 0) West -> #(0, -1) } Guard( #(guard.position.0 + new_pos.0, guard.position.1 + new_pos.1), guard.direction, ) } fn turn_guard(guard: Guard) -> Guard { let new_dir = case guard.direction { North -> East East -> South South -> West West -> North } Guard(guard.position, new_dir) } fn get_obstacles(grid: Grid(String)) -> List(Point) { dict.filter(grid, fn(_pos, char) { char == "#" }) |> dict.keys() } fn recurse_grid( grid: Grid(String), guard: Guard, obstacles: List(#(Int, Int)), visited: Set(#(#(Int, Int), Direction)), ) -> #(Set(#(#(Int, Int), Direction)), Loops) { let new_guard = move_guard(guard) let position = new_guard.position let dir = new_guard.direction case dict.has_key(grid, position) { False -> #(visited, DoesNotLoop) True -> { case set.contains(visited, #(position, dir)) { True -> { #(visited, DoesLoop) } False -> { case list.contains(obstacles, position) { True -> recurse_grid(grid, turn_guard(guard), obstacles, visited) False -> recurse_grid( grid, new_guard, obstacles, set.insert(visited, #(position, dir)), ) } } } } } } fn get_grid_input(filename: String) -> Grid(String) { let lines = filename |> simplifile.read() |> result.unwrap("") |> string.trim() |> string.split("\n") use grid, row, row_idx <- list.index_fold(lines, dict.new()) use grid, col, col_idx <- list.index_fold(string.to_graphemes(row), grid) dict.insert(grid, #(row_idx, col_idx), col) } fn part_one( grid: Grid(String), ) -> #(#(Set(#(#(Int, Int), Direction)), Loops), Int) { let guard = get_guard(grid) let obstacles = get_obstacles(grid) let visited = set.new() |> set.insert(#(guard.position, guard.direction)) let visited = recurse_grid(grid, guard, obstacles, visited) let visited_without_dir = set.fold(visited.0, set.new(), fn(acc, x) { set.insert(acc, x.0) }) #(visited, visited_without_dir |> set.size()) } fn check_loop(grid: Grid(String), blocker: Point) -> Loops { let blocked_grid = dict.upsert(grid, blocker, fn(x) { case x { Some("^") -> "^" Some(_) -> "#" None -> "#" } }) let visited = part_one(blocked_grid).0 visited.1 } fn part_two(grid: Grid(String), visited: Set(#(#(Int, Int), Direction))) { let visited = set.fold(visited, set.new(), fn(acc, x) { set.insert(acc, x.0) }) use counter, position <- set.fold(visited, 0) case check_loop(grid, position) { DoesLoop -> counter + 1 DoesNotLoop -> counter } } pub fn main() { let input = "input.in" let p1 = input |> get_grid_input() |> part_one let visited = p1.0.0 io.debug(p1.1) input |> get_grid_input |> part_two(visited) |> io.debug() }
#advent_of_code
CameronDev

🌉 - 2024 DAY 7 SOLUTIONS - 🌉

programming.dev/post/22558447

programming.dev🌉 - 2024 DAY 7 SOLUTIONS - 🌉 - programming.dev# Day 7: Bridge Repair ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

💂 - 2024 DAY 6 SOLUTIONS - 💂

programming.dev/post/22521066

programming.dev💂 - 2024 DAY 6 SOLUTIONS - 💂 - programming.dev# Day 6: Guard Gallivant ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

🖨️ - 2024 DAY 5 SOLUTIONS - 🖨️

programming.dev/post/22486116

programming.dev🖨️ - 2024 DAY 5 SOLUTIONS - 🖨️ - programming.dev# Day 5: Print Queue ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
CameronDev

🌚 - 2024 DAY 4 SOLUTIONS - 🌚

programming.dev/post/22445571

programming.dev🌚 - 2024 DAY 4 SOLUTIONS - 🌚 - programming.dev# Day 4: Ceres Search ## Megathread guidelines - Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever) - You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ [https://topaz.github.io/paste/] if you prefer sending it through a URL ## FAQ - What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268 [https://programming.dev/post/6637268] - Where do I participate?: https://adventofcode.com/ [https://adventofcode.com/] - Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465 [https://programming.dev/post/6631465]
#advent_of_code
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