Struct Day12 

pub struct Day12 { /* private fields */ }

2025 Day 12: Checking region sizes.

The solution assumes that each present shape can be treated as a solid 3x3 square. This makes the implementation trivial and much faster than a general solution to 2D bin packing (which is NP-complete).

Implementations

impl Day12

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

pub fn part1(&self) -> usize

pub fn part2(&self) -> &'static str

Trait Implementations

impl Clone for Day12

fn clone(&self) -> Day12

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Day12

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

Formats the value using the given formatter.

impl PuzzleDate for Day12

const DATE: Date

2025 Day 12

impl PuzzleExamples<usize, &'static str> for Day12

const EXAMPLES: &'static [(&'static str, Option<usize>, Option<&'static str>)]