Module advent_solutions::advent2017::day21

Day 21: Fractal Art

You find a program trying to generate some art. It uses a strange process that involves repeatedly enhancing the detail of an image through a set of rules.

Structs

Grid	The image consists of a two-dimensional square grid of pixels that are either on (#) or off (.).

Functions

parse_input
part1	How many pixels stay on after 5 iterations?
part2	How many pixels stay on after 18 iterations?
solve	The program always begins with this pattern: