Struct year2017::Day21

pub struct Day21 { /* private fields */ }

2017 Day 21: Iteratively applying pixel transformations.

The key optimization is that every three iterations a 3x3 square splits into nine independent 3x3 squares. Therefore, we can store counts for each of the 512 unique 3x3 squares and simulate three iterations at a time for each square to find the counts for the following three iterations

Implementations

impl Day21

pub fn new(input: &str, _: InputType) -> Result<Self, InputError>

pub fn part1(&self) -> u32

pub fn part2(&self) -> u32

Trait Implementations

impl Clone for Day21

fn clone(&self) -> Day21

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Day21

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Puzzle for Day21

const YEAR: Year = _

Year 2017

const DAY: Day = _

Day 21

impl PuzzleExamples<u32, u32> for Day21

const EXAMPLES: &'static [(&'static str, Option<u32>, Option<u32>)] = _