aoc2021
advent-of-code
aoc2021 | advent-of-code | |
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9 | 44 | |
1 | 23 | |
- | - | |
0.0 | 8.5 | |
9 months ago | 22 days ago | |
C | C++ | |
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
- -❄️- 2023 Day 11 Solutions -❄️-
- -❄️- 2023 Day 10 Solutions -❄️-
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-❄️- 2023 Day 9 Solutions -❄️-
Click here for a solution which will predict the humidity and other values, in all directions you can think of! You'll be able to use the water from the oasis, and predict when exactly it'll be salty enough for your taste!
- -❄️- 2023 Day 7 Solutions -❄️-
- -🎄- 2022 Day 25 Solutions -🎄-
- -🎄- 2022 Day 24 Solutions -🎄-
- -🎄- 2022 Day 23 Solutions -🎄-
- -🎄- 2022 Day 22 Solutions -🎄-
- -🎄- 2022 Day 21 Solutions -🎄-
- -🎄- 2022 Day 20 Solutions -🎄-
What are some alternatives?
AdventOfCode
adventofcode - Advent of Code solutions of 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 and 2023 in Scala
aoc-2021 - Advent of code 2021 challenges written in Rust to learn the language and get more comfortable with the it (and sometimes I just use C++)
advent-of-code-go - All 8 years of adventofcode.com solutions in Go/Golang; 2015 2016 2017 2018 2019 2020 2021 2022
AdventOfCode - My Advent of Code solutions. I also upload videos of my solves: https://www.youtube.com/channel/UCuWLIm0l4sDpEe28t41WITA
advent_of_code - Solutions to programming puzzles on Advent of Code
adventofcode - Solutions for problems from AdventOfCode.com
AoC - my personal repo for the advent of code yearly challenge
eigen
advent-2021 - [Moved to: https://github.com/Crazytieguy/advent-of-code]
AdventOfCode2021 - My solutions to https://adventofcode.com/2021
Advent-of-Code - Advent of Code