advent-of-code
My Advent of Code solutions through the years - mostly JS (by davidsharp)
aoc2021
Advent of Code 2021 - my answers (by ephemient)
Our great sponsors
advent-of-code | aoc2021 | |
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10 | 32 | |
3 | 26 | |
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8.2 | 0.0 | |
5 months ago | about 1 year ago | |
JavaScript | Kotlin | |
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The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
advent-of-code
Posts with mentions or reviews of advent-of-code.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-12-04.
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-🎄- 2022 Day 5 Solutions -🎄-
JavaScript
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-🎄- 2021 Day 20 Solutions -🎄-
Almost walked away from this when caught out by the "empty" space flipping. But stuck with it and managed to make it work without changing my approach too much.
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-🎄- 2021 Day 16 Solutions -🎄-
I enjoyed this one, despite all the reading. Felt like a nice change of gear from yesterday's. Using recursion to read sub-packets from the binary string, using a function that returns the value (or version sum in part 1) as well as the length, so I know where to read from for the next sub-packet.
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-🎄- 2021 Day 13 Solutions -🎄-
Enjoyed today's one, short and sweet
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-🎄- 2021 Day 8 Solutions -🎄-
Mine is similar (but in JS)
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-🎄- 2021 Day 3 Solutions -🎄-
Struggled to get my head around the explanation of part 2 today, need more coffee
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-🎄- 2021 Day 2 Solutions -🎄-
not the most inspired solution
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-🎄- 2021 Day 1 Solutions -🎄-
JS solutions, already settled back into the habit of relying on reduce functions
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2020 Day 21 Solutions
GitHub - Solutions to both halves
aoc2021
Posts with mentions or reviews of aoc2021.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-02-04.
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All years, all days, everything in Haskell
I've done every year in Haskell (2015 2016 2017 2018 2019 2020 2021), and so have several other people such as /u/glguy. I don't see if /u/mstksg has anything published for 2015 but they've done 2016 2017 2018 2019 2020 2021 along with some pretty good writeups, I recommend checking those out.
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Jetbrains looks like it's about to release Compose ui for ios, and web!
I ran my own benchmarks for a whole ton of code at https://github.com/ephemient/aoc2021 on both Linux x64 and macos x64, and ended up disabling Kotlin/Native because it was varying between 10x and 100x slower than Kotlin/JVM, eventually timing out on CI. The generated code may be reasonable thanks to LLVM, but the runtime certainly is not.
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-🎄- 2021 Day 25 Solutions -🎄-
Took a while for me to get around to completing this in Kotlin, Python, and Rust as well, since I was working on optimizing other solutions, but I finally made it.
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-🎄- 2021 Day 24 Solutions -🎄-
So I switched tacks and implemented this in Kotlin, where mutation is easier. First version was brute-force with duplicate state avoidance (checked before the state explosion at every input), which worked quickly enough for part 1, but ran into OOMs for part 2. Once I replaced the HashSet with a custom LruSet (and later a simpler CacheSet which simply overwrites on hash collisions) it ran part 2 in a few minutes. I then ported this into Haskell.
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-🎄- 2021 Day 23 Solutions -🎄-
Haskell 1171/339
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-🎄- 2021 Day 22 Solutions -🎄-
Kotlin, Python, and Rust solutions are the same solution but much uglier.
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-🎄- 2021 Day 21 Solutions -🎄-
I'm doing the same cached recursion in Kotlin, Python, and Rust.
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-🎄- 2021 Day 20 Solutions -🎄-
Haskell 621/603
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-🎄- 2021 Day 19 Solutions -🎄-
Haskell 258/240
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-🎄- 2021 Day 18 Solutions -🎄-
Haskell Kotlin 622/1185
What are some alternatives?
When comparing advent-of-code and aoc2021 you can also consider the following projects:
advent-of-code-2021
adventofcode - Advent of Code solutions of 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 and 2023 in Scala
scamp-cpu - A homebrew 16-bit CPU with a homebrew Unix-like-ish operating system.
AoC - my personal repo for the advent of code yearly challenge
aoc-2021-python - my Python solutions for Advent of Code 2021!
adventofcode - Advent of Code challenge solutions
z3 - The Z3 Theorem Prover
roast - 🦋 Raku test suite
advent-of-code - Advent of Code 2022
advent-2021 - [Moved to: https://github.com/Crazytieguy/advent-of-code]
aoc-2021-kotlin - Advent of Code 2021 puzzle solving using Kotlin
advent-of-code-go - All 8 years of adventofcode.com solutions in Go/Golang; 2015 2016 2017 2018 2019 2020 2021 2022
advent-of-code vs advent-of-code-2021
aoc2021 vs adventofcode
advent-of-code vs scamp-cpu
aoc2021 vs AoC
advent-of-code vs aoc-2021-python
aoc2021 vs adventofcode
advent-of-code vs z3
aoc2021 vs roast
advent-of-code vs advent-of-code
aoc2021 vs advent-2021
advent-of-code vs aoc-2021-kotlin
aoc2021 vs advent-of-code-go