part2

Advent of Code 2022 - Day 9 Part 2

Simulate your complete series of motions on a larger rope with ten knots. How many positions does the tail of the rope visit at least once?

Setup

Same.

Implementation

• add 8 positions, switch to :a, :b, :c...
• refactor touching and follow to take arbitrary pairs
• Enum.chunk_every/3 makes it easy to iterate each pair

Running

mix run

Testing

mix test