aoc21
advent-of-code
aoc21 | advent-of-code | |
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4 | 9 | |
2 | 5 | |
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0.0 | 7.1 | |
over 1 year ago | 3 months ago | |
Crystal | Python | |
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aoc21
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Advent of Code Day 24: Computing with Sets
The way I solved this was by squinting a little and realizing that every time a div instruction happened, then a certain number following it needed to be 0, depending on the value of certain constants embedded in the code, and also on certain other fields in the input. So instead of starting with an input number, it is possible to calculate the min and max values the fields may contain right there, as long as we embed the field positions in a stack.
As this is only going through the code once, this is virtually instantaneous and ended up as the day that was fastest of all days to compute.
https://github.com/yxhuvud/aoc21/blob/main/day24.cr
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[2021] Solving AoC with Rust before Python can start
My solution, https://github.com/yxhuvud/aoc21/blob/main/all_days.cr :
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Speeding up Dijkstra by a factor of 2700
Yes, though sometimes it is possible to replace a fully general priority queue with a faster structure that is using the structure of the problem at hand. For example, this problem (AoC day 15) has only ever a count of unique priorities that is 10 or fewer. That allows a queue implementation to be https://github.com/yxhuvud/aoc21/blob/main/day15.cr#L27-L51 , being amortized O(1) in both insertion and deletion. This pushed down the runtime another magnitude for me, the whole day running at 0.014s.
- -🎄- 2021 Day 18 Solutions -🎄-
advent-of-code
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-🎄- 2022 Day 16 Solutions -🎄-
Python my ugliest solution this year! Kill me 🤮
- -🎄- 2021 Day 23 Solutions -🎄-
- -🎄- 2021 Day 18 Solutions -🎄-
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-🎄- 2021 Day 16 Solutions -🎄-
On github
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-🎄- 2021 Day 7 Solutions -🎄-
Python https://github.com/fridokus/advent-of-code/blob/master/2021/7.py
- -🎄- 2021 Day 6 Solutions -🎄-
- -🎄- 2021 Day 3 Solutions -🎄-
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-🎄- 2020 Day 22 Solutions -🎄-
Python 3
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2020 Day 21 Solutions
Python 3 solved second part by inspection first but decided to implement it later in code
What are some alternatives?
nom - Rust parser combinator framework
personal_code - random code that I have lying around
Advent-of-Code - Advent of Code
advent-of-code-2021 - My solutions for the "Advent of Code 2021"
aoc
advent-of-code-2020 - 🎅🌟❄️☃️🎄🎁
adventofcode
Advent-of-Code - My solutions for the Advent of Code puzzles (work in progress).
advent-of-code
algorithm-problems - My solutions to various problems / competitions
adventofcode_2021 - AdventOfCode 2021
advent-of-code-2020-jq - Solving Advent of Code with jq [Moved to: https://github.com/odnoletkov/advent-of-code-jq]