Day 8: Haunted Wasteland

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[-] reboot6675@sopuli.xyz 2 points 11 months ago

I crafted a simple counter-example (single letters for brevity). The way the sequence goes totally depends on the instructions, and we don't have any guarantees on that. It could be anything. Of course, looking at the input data we could find what the instructions are, but the assumption doesn't hold in general.

A = (B, X)
B = (C, X)
C = (X, Z)
Z = (A, C)
X = (X, X)

L L R L L L R R R -> A B C Z A B C Z C Z
L L R R R L L L R -> A B C Z C Z A B C Z

Here the distance of Z cycling back into itself could be 2 or 4, depending on what the instruction string is doing.

this post was submitted on 08 Dec 2023

21 points (92.0% liked)

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