advent-of-code
advent-of-code | AdventOfCode2021 | |
---|---|---|
7 | 12 | |
65 | 1 | |
- | - | |
8.3 | 2.6 | |
15 days ago | over 2 years ago | |
Python | Perl | |
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advent-of-code
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-❄️- 2023 Day 8 Solutions -❄️-
Step-by-step explanation | full code
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Me: "I'm going to learn rust for Advent of code!" Also me:
Code's all here: https://github.com/xavdid/advent-of-code
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Advent of Code 2022
AoC is one of my favorite events of the year! I find the puzzles generally approachable, but interesting enough to spend time on. I also like that there's a definitively right answer, which motivates me in an interesting way. I've developed a base class over the years that handles input parsing, so I can focus more on the solutions themselves.
Additionally I've been solving for a number of years, but for the past 2 years, I've done a daily explanation of the solution. I use interesting parts of the Python stdlib and walk readers through common algorithms. I've found it _incredibly_ rewarding and plan on doing it again this year.
You can see all of those solutions here: https://github.com/xavdid/advent-of-code/tree/main/solutions
Please let me know if you enjoy reading these, I love hearing from folks!
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-🎄- 2021 Day 13 Solutions -🎄-
Nice! This was basically the same as my solution, but mine was much more verbose.
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-🎄- 2021 Day 6 Solutions -🎄-
Solution and writeup here: https://github.com/xavdid/advent-of-code/tree/main/solutions/2021/day_6
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Day 1 Part 2 Issues
I do a daily solution walkthrough on GitHub if you'd like to follow along. Yesterday's is here: https://github.com/xavdid/advent-of-code/blob/main/solutions/2021/day_1
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Advent of Code 2021
AoC is one of my favorite events of the year. I find the puzzles to be much more approachable than things like Project Euler. I regularly credit my yearly participation for making me a better programmer.
I also do a daily writeup of my solution, which helps make sure I understand the problem and help others who are learning. I found it super rewarding last year, so I'm doing it again this year. They're in my GH repo. Here's today's: https://github.com/xavdid/advent-of-code/tree/main/solutions...
My big tip is that you probably don't need to worry about competing for the leaderboard (unless you really want to). Go at your own pace, don't stay up weird hours, and take a break.
AdventOfCode2021
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-🎄- 2021 Day 18 Solutions -🎄-
Full program on GitHub.
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-🎄- 2021 Day 15 Solutions -🎄-
Full program including code to deal with heaps, on GitHub.
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[2021 Day 11 (Part 2)] What input takes the most steps to synchronize?
Program I used for the above results
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-🎄- 2021 Day 8 Solutions -🎄-
See my solution on GitHub.
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Day 6 Proof of Correctness
Note also that you can solve this without a complexity dependency on n. Most solutions I have seen, including mine run in time O(tD), where t is the maximum value of a timer, and D the number of generation, requiring O(t) memory. (This is assuming we can do the required arithmetic operations in constant time, and each numbers require a fixed around of memory storage; if the number of fish gets huge, throw in an additional log n in the complexities, where n is the number of fish on the final day).
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-🎄- 2021 Day 6 Solutions -🎄-
Based on my matrix exponentiation solution, here is a closed-form solution:
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How do I read today's input ? Part 1
In my Perl solution of today (I assume, you mean 2021, Day 4), I read stuff in paragraph mode ($/ = "") which makes Perl split input on 2 or more newlines.
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2021 Day #4 (Part 1) [Native Python ONLY] - Conceptual Guidance?
I considered doing that for my (Perl) solution, but given the cards are small, that seemed overkill.
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-🎄- 2021 Day 4 Solutions -🎄-
Python implementation on GitHub
What are some alternatives?
Advent-Of-Code16-Prolog - Advent of Code 2016 - Prolog Solutions
Elixir - Elixir is a dynamic, functional language for building scalable and maintainable applications
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Advent-of-code - My solutions of adventofcode.com
protohacks
Advent_of_Code_2021_Solutions_Java - Personal AoC/2021 Solutions in Java
AdventOfCode2022 - https://adventofcode.com/2022
adventofcode - Advent of Code solutions of 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 and 2023 in Scala
aoc2021 - Advent of Code 2021 on my homemade 16-bit CPU SCAMP
adventofcode - Advent of Code challenge solutions
AdventOfCode2021 - Advent of code 2021
adventofcode - Solutions for problems from AdventOfCode.com