aoc2021
Advent-of-Code
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aoc2021 | Advent-of-Code | |
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9 | 42 | |
1 | 9 | |
- | - | |
0.0 | 8.6 | |
8 months ago | 4 months ago | |
C | Python | |
MIT License | - |
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aoc2021
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[2021 day 6] What's you're fastest solution?
This in C runs in 215 us on a Pi 4 with the cpu in performance mode: https://github.com/ednl/aoc2021/blob/main/day06.c
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[DAY 6] C# solution with commentary
I took a few hints from the solutions thread and made this in C which executes in 0.4 milliseconds on a Raspberry Pi 4: https://github.com/ednl/aoc2021/blob/main/day06.c
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[2021 Day 18] [C++] Overcomplicated solution after a lot of grief and hair loss.
Good outcome. I'm not well versed in C++ so I can't say much about it. For my solution in C, I figured that a full-blown tree was too much work and also not really needed if I kept track of the level myself, because everything is always in the same order left to right, just expanding and contracting. So I used a linked list and a SF number became an array of SF digits where each digit is a struct { left,right,level,value }. I guess the trickiest bit was to do the accountancy of keeping everything linked correctly when exploding and splitting.
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[2021] What did you learn or take away from AoC 2021?
The constant time thing is counting fish in an age histogram mod 9, right? I think that idea floated around the solution thread. I am no longer sure if I saw it there first or came up with it myself..... but here's my implementation in C: https://github.com/ednl/aoc2021/blob/main/day06.c
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-🎄- 2021 Day 14 Solutions -🎄-
Added lots of comments as explanation of the ideas and the code: https://github.com/ednl/aoc2021/blob/main/day14.c
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-🎄- 2021 Day 6 Solutions -🎄-
Good ol' C code. Very simple program once you think of making a circular buffer from the population histogram by age bins, and simulating every day. I got stuck for a while trying to come up with a direct mathematical function which never gave me the exact number. The crux:
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-🎄- 2021 Day 4 Solutions -🎄-
C, which takes some bookkeeping but it can be fast. I didn't push for every last drop of speed but still: about 3 ms on a Raspberry Pi 4 (1.8 GHz overclock, Buster desktop, not very quiet so I picked a good run). Code with lots of comments
Advent-of-Code
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-❄️- 2023 Day 11 Solutions -❄️-
Fun one :D
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-❄️- 2023 Day 10 Solutions -❄️-
Way trickier than I was expecting
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-❄️- 2023 Day 9 Solutions -❄️-
:D
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-❄️- 2023 Day 8 Solutions -❄️-
Classic LCM
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-❄️- 2023 Day 7 Solutions -❄️-
Who wants spaghetti?
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-❄️- 2023 Day 6 Solutions -❄️-
Much easier than yesterday's :D
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-🎄- 2022 Day 12 Solutions -🎄-
195/242
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-🎄- 2022 Day 11 Solutions -🎄-
Messy. Thankfully got part two pretty quickly recognizing that we can mod the worry level by the product of the test integers. Might refactor / clean this up tomorrow morning
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-🎄- 2022 Day 10 Solutions -🎄-
2343 / 2119
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-🎄- 2022 Day 6 Solutions -🎄-
Impressive how fast everyone was with this one today
What are some alternatives?
AdventOfCode
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AdventOfCode-Java - adventOfCode(Language.JAVA);
AoC - my personal repo for the advent of code yearly challenge
Advent_of_Code_in_Pascal - My solutions to the Advent of Code, in Free Pascal
adventofcode - Solutions for problems from AdventOfCode.com
AdventOfCode - My Advent of Code solutions. I also upload videos of my solves: https://www.youtube.com/channel/UCuWLIm0l4sDpEe28t41WITA
aoc2020 - Advent of Code 2020 - my answers
advent-of-code-2021 - 🎅🌟❄️☃️🎄🎁
advent-of-code-go - All 8 years of adventofcode.com solutions in Go/Golang; 2015 2016 2017 2018 2019 2020 2021 2022
AdventOfCode2021 - Solutions to all 25 AoC 2021 problems in Rust :crab: Less than 100 lines per day and under 1 second total execution time! :christmas_tree: