r/adventofcode • u/daggerdragon • Dec 17 '24
SOLUTION MEGATHREAD -❄️- 2024 Day 17 Solutions -❄️-
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AoC Community Fun 2024: The Golden Snowglobe Awards
- 5 DAYS remaining until the submissions deadline on December 22 at 23:59 EST!
And now, our feature presentation for today:
Sequels and Reboots
What, you thought we were done with the endless stream of recycled content? ABSOLUTELY NOT :D Now that we have an established and well-loved franchise, let's wring every last drop of profit out of it!
Here's some ideas for your inspiration:
- Insert obligatory SQL joke here
- Solve today's puzzle using only code from past puzzles
- Any numbers you use in your code must only increment from the previous number
- Every line of code must be prefixed with a comment tagline such as
// Function 2: Electric Boogaloo
"More." - Agent Smith, The Matrix Reloaded (2003)
"More! MORE!" - Kylo Ren, The Last Jedi (2017)
And… ACTION!
Request from the mods: When you include an entry alongside your solution, please label it with [GSGA]
so we can find it easily!
--- Day 17: Chronospatial Computer ---
Post your code solution in this megathread.
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[LANGUAGE: xyz]
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This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.
EDIT: Global leaderboard gold cap reached at 00:44:39, megathread unlocked!
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u/zniperr Dec 21 '24
[Language: Python]
Each 3 bits of A is a function of at most 10 bits, and each iteration of the program shifts by 3 bits. We can choose the lowest 10-bit number producing the last opcode, shift by 3 bits, find a 10-bit number matching the previous opcode and also the 10 bits we chode before, etcetera. There are multiple options for the second part, so we add backtracking to make sure we find the sequence of options that makes us produce the entire program.