jonas.tngl.sh
Advent of Code solutions in Rust
feat: day 20 of AoC 2020
+757
-2
+755
aoc_2020/src/day20.rs
+755
aoc_2020/src/day20.rs
···
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+
use std::collections::{HashMap, HashSet};
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+
3
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use anyhow::{Context, anyhow, bail};
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use aoc_companion::prelude::*;
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use itertools::Itertools;
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use ndarray::s;
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+
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pub(crate) struct Door {
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tiles: HashMap<TileId, Tile>,
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}
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+
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impl<'input> Solution<'input> for Door {
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fn parse(input: &'input str) -> Result<Self> {
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input
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.split("\n\n")
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.map(|block| {
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let Some((preamble, tile)) = block.split_once(':') else {
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bail!("missing colon after tile preample");
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};
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let tile_id = preamble
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.strip_prefix("Tile ")
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.ok_or_else(|| anyhow!("missing tile introducer"))?
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.parse()
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.context("failed to parse tile ID")
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.map(TileId)?;
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let tile = aoc_utils::geometry::try_parse_map(tile.trim(), |b| match b {
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b'.' => Ok(0),
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b'#' => Ok(1),
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_ => Err(InvalidTileChar { byte: b }),
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})
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.context("")?;
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Ok((tile_id, tile))
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})
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.try_collect()
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.map(|tiles| Self { tiles })
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}
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+
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fn part1(&self) -> u64 {
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corner_tiles(
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tiles_by_edge_signature(self.tiles.iter().map(|(&id, tile)| (id, tile.view())))
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.values(),
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)
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.map(|TileId(id)| id)
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.product()
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}
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+
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fn part2(&self) -> Result<usize> {
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Ok(
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purge_monsters(puzzle(self.tiles.iter().map(|(&id, tile)| (id, tile.view()))).view())?
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.into_iter()
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.filter(|&x| x == 1)
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.count(),
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)
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}
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}
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+
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#[derive(Debug, thiserror::Error)]
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#[error("invalid tile character {:?} ({byte:x})", String::from_utf8_lossy(&[self.byte]))]
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struct InvalidTileChar {
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byte: u8,
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}
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
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struct TileId(u64);
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type Tile = ndarray::Array2<u8>;
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type TileView<'a> = ndarray::ArrayView2<'a, u8>;
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+
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
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struct EdgeSignature(u16);
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impl EdgeSignature {
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fn new<'a>(edge: impl IntoIterator<Item = &'a u8>) -> Self {
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let sig = edge.into_iter().fold(0, |acc, e| (acc << 1) | *e as u16);
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Self(sig.min(sig.reverse_bits() >> 6))
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}
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}
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fn edge_signatures(tile: TileView) -> [EdgeSignature; 4] {
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[
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EdgeSignature::new(tile.slice(s!(.., 0))),
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EdgeSignature::new(tile.slice(s!(0, ..))),
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EdgeSignature::new(tile.slice(s!(.., -1))),
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EdgeSignature::new(tile.slice(s!(-1, ..))),
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]
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}
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fn tiles_by_edge_signature<'a>(
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tiles: impl IntoIterator<Item = (TileId, TileView<'a>)>,
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) -> HashMap<EdgeSignature, Vec<TileId>> {
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tiles
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.into_iter()
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.flat_map(|(tile_id, tile)| edge_signatures(tile).map(|e| (e, tile_id)))
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.into_group_map()
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}
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+
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fn corner_tiles<'a>(
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tiles_with_same_edges: impl IntoIterator<Item = &'a Vec<TileId>>,
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) -> impl Iterator<Item = TileId> {
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tiles_with_same_edges
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.into_iter()
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.filter_map(|v| match v[..] {
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[tile_id] => Some(tile_id),
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_ => None,
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})
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.duplicates()
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}
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+
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fn border_tiles<'a>(
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tiles_with_same_edges: impl IntoIterator<Item = &'a Vec<TileId>>,
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) -> HashSet<TileId> {
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tiles_with_same_edges
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.into_iter()
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.filter_map(|v| match v[..] {
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[tile_id] => Some(tile_id),
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_ => None,
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})
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.collect()
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}
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+
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fn shares_edge_with(edge: EdgeSignature, tile: TileView) -> bool {
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edge_signatures(tile).into_iter().any(|e| e == edge)
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}
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fn puzzle<'a>(tiles: impl IntoIterator<Item = (TileId, TileView<'a>)>) -> ndarray::Array2<u8> {
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let tiles = HashMap::<_, _>::from_iter(tiles);
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let tiles_by_edges = tiles_by_edge_signature(tiles.iter().map(|(&k, &v)| (k, v)));
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+
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let dim = tiles.len().isqrt();
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let mut puzzled_ids = ndarray::Array2::from_elem((dim, dim), None);
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// Identify corner and border tiles based on edge-sharing statistics
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let top_left_corner = corner_tiles(tiles_by_edges.values()).next().unwrap();
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let mut border_tiles = border_tiles(tiles_by_edges.values());
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+
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// Trace out the border tiles in order
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border_tiles.remove(&top_left_corner);
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let mut border_ids = std::iter::successors(Some(top_left_corner), |prev| {
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let prev_edges = edge_signatures(tiles[prev]);
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border_tiles
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.extract_if(|b| {
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prev_edges
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.iter()
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.any(|&edge| shares_edge_with(edge, tiles[b]))
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})
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.next()
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});
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+
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// Spread the border tile IDs on the square border
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for slice in [s![0, ..-1], s![..-1, -1], s![-1,1..;-1], s![1..;-1,0]] {
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for (dest, source) in puzzled_ids.slice_mut(slice).iter_mut().zip(&mut border_ids) {
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*dest = Some(source);
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}
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}
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// Fill in the inner tiles based two neighboring known tiles
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for (i, j) in (0..dim - 2).cartesian_product(0..dim - 2) {
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let upper_edges = edge_signatures(tiles[&puzzled_ids[(i, j + 1)].unwrap()]);
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let left_edges = edge_signatures(tiles[&puzzled_ids[(i + 1, j)].unwrap()]);
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puzzled_ids[(i + 1, j + 1)] = Some(
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*tiles
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.iter()
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.filter(|(id, _)| **id != puzzled_ids[(i, j)].unwrap())
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.find(|(_, tile)| {
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upper_edges
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.iter()
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.any(|&edge| shares_edge_with(edge, **tile))
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&& left_edges
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.iter()
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.any(|&edge| shares_edge_with(edge, **tile))
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})
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.unwrap()
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.0,
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);
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}
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// Place matching rotoreflection of tile in the final grid
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let cell_dim = tiles.values().next().unwrap().dim().0 - 2;
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let grid_dim = cell_dim * dim;
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let mut grid = ndarray::Array2::from_elem((grid_dim, grid_dim), 0);
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+
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dbg!(puzzled_ids.clone().map(|t| t.unwrap().0));
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+
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for (((i, j), id), mut dest) in puzzled_ids
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.indexed_iter()
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.zip_eq(grid.exact_chunks_mut((cell_dim, cell_dim)))
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{
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let id = id.unwrap();
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let fitting_rotoreflection = rotoreflections(tiles[&id])
190
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.iter()
191
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.copied()
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.filter(|&rr| {
193
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if i > 0 {
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shares_edge_with(
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edge_signatures(rr)[1],
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tiles[&puzzled_ids[(i - 1, j)].unwrap()],
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)
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} else {
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shares_edge_with(
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edge_signatures(rr)[3],
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tiles[&puzzled_ids[(i + 1, j)].unwrap()],
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)
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}
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})
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.find(|&rr| {
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if j > 0 {
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shares_edge_with(
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edge_signatures(rr)[0],
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tiles[&puzzled_ids[(i, j - 1)].unwrap()],
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)
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} else {
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shares_edge_with(
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edge_signatures(rr)[2],
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tiles[&puzzled_ids[(i, j + 1)].unwrap()],
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)
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}
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})
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.with_context(|| format!("failed to find fitting rotoreflection for {:?}", (i, j)))
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.unwrap();
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+
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dest.assign(
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&fitting_rotoreflection
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.slice(s![1.., 1..])
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.slice(s![..-1, ..-1]),
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);
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}
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grid
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}
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fn rotoreflections(tile: TileView) -> [TileView; 8] {
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let mut swapped = tile;
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swapped.swap_axes(0, 1);
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[
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tile.slice_move(s![.., ..]),
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tile.slice_move(s![..;-1,..]),
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tile.slice_move(s![..,..;-1]),
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tile.slice_move(s![..;-1,..;-1]),
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swapped.slice_move(s![.., ..]),
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swapped.slice_move(s![..;-1,..]),
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swapped.slice_move(s![..,..;-1]),
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swapped.slice_move(s![..;-1,..;-1]),
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]
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}
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+
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fn purge_monsters(puzzle: TileView) -> Result<Tile> {
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const MONSTER_MASK: TileView = ndarray::aview2(&[
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0],
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[1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1],
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[0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0],
251
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]);
252
+
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let Some(puzzle) = rotoreflections(puzzle).iter().copied().find(|puzzle| {
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puzzle
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.windows(MONSTER_MASK.dim())
256
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.into_iter()
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.any(|window| &window * &MONSTER_MASK == MONSTER_MASK)
258
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}) else {
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bail!("did not find any sea monsters");
260
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};
261
+
262
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let mut monsters = Tile::from_elem(puzzle.dim(), 0);
263
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for (puzzle_win, monsters_win) in puzzle
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.windows(MONSTER_MASK.dim())
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.into_iter()
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.zip_eq(monsters.cell_view().windows(MONSTER_MASK.dim()))
267
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{
268
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if &puzzle_win * &MONSTER_MASK == MONSTER_MASK {
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ndarray::Zip::from(monsters_win)
270
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.and(MONSTER_MASK)
271
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.for_each(|dest, mask| dest.update(|d| d.max(*mask)));
272
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}
273
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}
274
+
275
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Ok(monsters ^ puzzle)
276
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}
277
+
278
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#[cfg(test)]
279
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mod tests {
280
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use std::convert::Infallible;
281
+
282
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use itertools::Itertools;
283
+
284
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use super::*;
285
+
286
+
#[test]
287
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fn parse_example_input() {
288
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let Door { tiles } = Door::parse(EXAMPLE_INPUT).unwrap();
289
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let expected_tiles = HashMap::from(EXAMPLE_TILES);
290
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for tile_id in tiles.keys().chain(expected_tiles.keys()).unique() {
291
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assert_eq!(
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tiles.get(tile_id).map(|a| a.view()).as_ref(),
293
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expected_tiles.get(tile_id),
294
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"mismatch for {tile_id:?}"
295
+
)
296
+
}
297
+
}
298
+
299
+
#[test]
300
+
fn edge_signatures_of_example_tile_2311() {
301
+
assert_eq!(
302
+
HashSet::from(edge_signatures(EXAMPLE_TILES[0].1)),
303
+
HashSet::from(TILE_2311_EDGE_SIGNATURES)
304
+
);
305
+
}
306
+
307
+
#[test]
308
+
fn rotoreflections_have_the_same_edge_signatures() {
309
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for rotoreflection in rotoreflections(EXAMPLE_TILES[0].1) {
310
+
assert_eq!(
311
+
HashSet::from(edge_signatures(rotoreflection)),
312
+
HashSet::from(TILE_2311_EDGE_SIGNATURES)
313
+
);
314
+
}
315
+
}
316
+
317
+
#[test]
318
+
fn example_tiles_by_edge_signature() {
319
+
assert_eq!(
320
+
tiles_by_edge_signature(EXAMPLE_TILES),
321
+
HashMap::from([
322
+
// corner tiles
323
+
(EdgeSignature(391), vec![TileId(1171)]),
324
+
(EdgeSignature(24), vec![TileId(1171)]),
325
+
(EdgeSignature(587), vec![TileId(1951)]),
326
+
(EdgeSignature(177), vec![TileId(1951)]),
327
+
(EdgeSignature(78), vec![TileId(2971)]),
328
+
(EdgeSignature(161), vec![TileId(2971)]),
329
+
(EdgeSignature(501), vec![TileId(3079)]),
330
+
(EdgeSignature(66), vec![TileId(3079)]),
331
+
// border tiles
332
+
(EdgeSignature(43), vec![TileId(1489)]),
333
+
(EdgeSignature(481), vec![TileId(2473)]),
334
+
(EdgeSignature(231), vec![TileId(2311)]),
335
+
(EdgeSignature(271), vec![TileId(2729)]),
336
+
// inner tiles
337
+
(EdgeSignature(234), vec![TileId(1427), TileId(2473)]),
338
+
(EdgeSignature(85), vec![TileId(2971), TileId(2729)]),
339
+
(EdgeSignature(399), vec![TileId(1171), TileId(2473)]),
340
+
(EdgeSignature(9), vec![TileId(1427), TileId(2729)]),
341
+
(EdgeSignature(318), vec![TileId(2311), TileId(1951)]),
342
+
(EdgeSignature(89), vec![TileId(2311), TileId(3079)]),
343
+
(EdgeSignature(210), vec![TileId(2311), TileId(1427)]),
344
+
(EdgeSignature(18), vec![TileId(1171), TileId(1489)]),
345
+
(EdgeSignature(565), vec![TileId(1489), TileId(2971)]),
346
+
(EdgeSignature(116), vec![TileId(2473), TileId(3079)]),
347
+
(EdgeSignature(183), vec![TileId(1427), TileId(1489)]),
348
+
(EdgeSignature(397), vec![TileId(1951), TileId(2729)]),
349
+
])
350
+
);
351
+
}
352
+
353
+
#[test]
354
+
fn identify_example_corner_tiles() {
355
+
assert_eq!(
356
+
HashSet::from_iter(corner_tiles(
357
+
tiles_by_edge_signature(EXAMPLE_TILES).values()
358
+
)),
359
+
HashSet::from([TileId(1171), TileId(1951), TileId(2971), TileId(3079)])
360
+
);
361
+
}
362
+
363
+
#[test]
364
+
fn identify_example_border_tiles() {
365
+
assert_eq!(
366
+
border_tiles(tiles_by_edge_signature(EXAMPLE_TILES).values()),
367
+
HashSet::from([
368
+
TileId(1951),
369
+
TileId(2311),
370
+
TileId(3079),
371
+
TileId(2473),
372
+
TileId(1171),
373
+
TileId(1489),
374
+
TileId(2971),
375
+
TileId(2729),
376
+
])
377
+
);
378
+
}
379
+
380
+
#[test]
381
+
fn solve_example_puzzle() {
382
+
assert!(
383
+
rotoreflections(puzzle(EXAMPLE_TILES).view())
384
+
.iter()
385
+
.contains(&EXAMPLE_PUZZLE)
386
+
);
387
+
}
388
+
389
+
#[test]
390
+
fn purge_monsters_from_example() {
391
+
let expected: Tile =
392
+
aoc_utils::geometry::try_parse_map::<_, Infallible>(PURGED_EXAMPLE, |b| {
393
+
Ok((b == b'#') as u8)
394
+
})
395
+
.unwrap();
396
+
for puzzle_roto in rotoreflections(EXAMPLE_PUZZLE) {
397
+
assert_eq!(purge_monsters(puzzle_roto).unwrap(), expected);
398
+
}
399
+
}
400
+
401
+
const TILE_2311_EDGE_SIGNATURES: [EdgeSignature; 4] = [
402
+
EdgeSignature(0b0100111110),
403
+
EdgeSignature(0b0001011001),
404
+
EdgeSignature(0b0011010010),
405
+
EdgeSignature(0b0011100111),
406
+
];
407
+
408
+
const EXAMPLE_INPUT: &str = "\
409
+
Tile 2311:
410
+
..##.#..#.
411
+
##..#.....
412
+
#...##..#.
413
+
####.#...#
414
+
##.##.###.
415
+
##...#.###
416
+
.#.#.#..##
417
+
..#....#..
418
+
###...#.#.
419
+
..###..###
420
+
421
+
Tile 1951:
422
+
#.##...##.
423
+
#.####...#
424
+
.....#..##
425
+
#...######
426
+
.##.#....#
427
+
.###.#####
428
+
###.##.##.
429
+
.###....#.
430
+
..#.#..#.#
431
+
#...##.#..
432
+
433
+
Tile 1171:
434
+
####...##.
435
+
#..##.#..#
436
+
##.#..#.#.
437
+
.###.####.
438
+
..###.####
439
+
.##....##.
440
+
.#...####.
441
+
#.##.####.
442
+
####..#...
443
+
.....##...
444
+
445
+
Tile 1427:
446
+
###.##.#..
447
+
.#..#.##..
448
+
.#.##.#..#
449
+
#.#.#.##.#
450
+
....#...##
451
+
...##..##.
452
+
...#.#####
453
+
.#.####.#.
454
+
..#..###.#
455
+
..##.#..#.
456
+
457
+
Tile 1489:
458
+
##.#.#....
459
+
..##...#..
460
+
.##..##...
461
+
..#...#...
462
+
#####...#.
463
+
#..#.#.#.#
464
+
...#.#.#..
465
+
##.#...##.
466
+
..##.##.##
467
+
###.##.#..
468
+
469
+
Tile 2473:
470
+
#....####.
471
+
#..#.##...
472
+
#.##..#...
473
+
######.#.#
474
+
.#...#.#.#
475
+
.#########
476
+
.###.#..#.
477
+
########.#
478
+
##...##.#.
479
+
..###.#.#.
480
+
481
+
Tile 2971:
482
+
..#.#....#
483
+
#...###...
484
+
#.#.###...
485
+
##.##..#..
486
+
.#####..##
487
+
.#..####.#
488
+
#..#.#..#.
489
+
..####.###
490
+
..#.#.###.
491
+
...#.#.#.#
492
+
493
+
Tile 2729:
494
+
...#.#.#.#
495
+
####.#....
496
+
..#.#.....
497
+
....#..#.#
498
+
.##..##.#.
499
+
.#.####...
500
+
####.#.#..
501
+
##.####...
502
+
##..#.##..
503
+
#.##...##.
504
+
505
+
Tile 3079:
506
+
#.#.#####.
507
+
.#..######
508
+
..#.......
509
+
######....
510
+
####.#..#.
511
+
.#...#.##.
512
+
#.#####.##
513
+
..#.###...
514
+
..#.......
515
+
..#.###...";
516
+
517
+
const EXAMPLE_TILES: [(TileId, TileView); 9] = [
518
+
(
519
+
TileId(2311),
520
+
ndarray::aview2(&[
521
+
[0, 0, 1, 1, 0, 1, 0, 0, 1, 0],
522
+
[1, 1, 0, 0, 1, 0, 0, 0, 0, 0],
523
+
[1, 0, 0, 0, 1, 1, 0, 0, 1, 0],
524
+
[1, 1, 1, 1, 0, 1, 0, 0, 0, 1],
525
+
[1, 1, 0, 1, 1, 0, 1, 1, 1, 0],
526
+
[1, 1, 0, 0, 0, 1, 0, 1, 1, 1],
527
+
[0, 1, 0, 1, 0, 1, 0, 0, 1, 1],
528
+
[0, 0, 1, 0, 0, 0, 0, 1, 0, 0],
529
+
[1, 1, 1, 0, 0, 0, 1, 0, 1, 0],
530
+
[0, 0, 1, 1, 1, 0, 0, 1, 1, 1],
531
+
]),
532
+
),
533
+
(
534
+
TileId(1951),
535
+
ndarray::aview2(&[
536
+
[1, 0, 1, 1, 0, 0, 0, 1, 1, 0],
537
+
[1, 0, 1, 1, 1, 1, 0, 0, 0, 1],
538
+
[0, 0, 0, 0, 0, 1, 0, 0, 1, 1],
539
+
[1, 0, 0, 0, 1, 1, 1, 1, 1, 1],
540
+
[0, 1, 1, 0, 1, 0, 0, 0, 0, 1],
541
+
[0, 1, 1, 1, 0, 1, 1, 1, 1, 1],
542
+
[1, 1, 1, 0, 1, 1, 0, 1, 1, 0],
543
+
[0, 1, 1, 1, 0, 0, 0, 0, 1, 0],
544
+
[0, 0, 1, 0, 1, 0, 0, 1, 0, 1],
545
+
[1, 0, 0, 0, 1, 1, 0, 1, 0, 0],
546
+
]),
547
+
),
548
+
(
549
+
TileId(1171),
550
+
ndarray::aview2(&[
551
+
[1, 1, 1, 1, 0, 0, 0, 1, 1, 0],
552
+
[1, 0, 0, 1, 1, 0, 1, 0, 0, 1],
553
+
[1, 1, 0, 1, 0, 0, 1, 0, 1, 0],
554
+
[0, 1, 1, 1, 0, 1, 1, 1, 1, 0],
555
+
[0, 0, 1, 1, 1, 0, 1, 1, 1, 1],
556
+
[0, 1, 1, 0, 0, 0, 0, 1, 1, 0],
557
+
[0, 1, 0, 0, 0, 1, 1, 1, 1, 0],
558
+
[1, 0, 1, 1, 0, 1, 1, 1, 1, 0],
559
+
[1, 1, 1, 1, 0, 0, 1, 0, 0, 0],
560
+
[0, 0, 0, 0, 0, 1, 1, 0, 0, 0],
561
+
]),
562
+
),
563
+
(
564
+
TileId(1427),
565
+
ndarray::aview2(&[
566
+
[1, 1, 1, 0, 1, 1, 0, 1, 0, 0],
567
+
[0, 1, 0, 0, 1, 0, 1, 1, 0, 0],
568
+
[0, 1, 0, 1, 1, 0, 1, 0, 0, 1],
569
+
[1, 0, 1, 0, 1, 0, 1, 1, 0, 1],
570
+
[0, 0, 0, 0, 1, 0, 0, 0, 1, 1],
571
+
[0, 0, 0, 1, 1, 0, 0, 1, 1, 0],
572
+
[0, 0, 0, 1, 0, 1, 1, 1, 1, 1],
573
+
[0, 1, 0, 1, 1, 1, 1, 0, 1, 0],
574
+
[0, 0, 1, 0, 0, 1, 1, 1, 0, 1],
575
+
[0, 0, 1, 1, 0, 1, 0, 0, 1, 0],
576
+
]),
577
+
),
578
+
(
579
+
TileId(1489),
580
+
ndarray::aview2(&[
581
+
[1, 1, 0, 1, 0, 1, 0, 0, 0, 0],
582
+
[0, 0, 1, 1, 0, 0, 0, 1, 0, 0],
583
+
[0, 1, 1, 0, 0, 1, 1, 0, 0, 0],
584
+
[0, 0, 1, 0, 0, 0, 1, 0, 0, 0],
585
+
[1, 1, 1, 1, 1, 0, 0, 0, 1, 0],
586
+
[1, 0, 0, 1, 0, 1, 0, 1, 0, 1],
587
+
[0, 0, 0, 1, 0, 1, 0, 1, 0, 0],
588
+
[1, 1, 0, 1, 0, 0, 0, 1, 1, 0],
589
+
[0, 0, 1, 1, 0, 1, 1, 0, 1, 1],
590
+
[1, 1, 1, 0, 1, 1, 0, 1, 0, 0],
591
+
]),
592
+
),
593
+
(
594
+
TileId(2473),
595
+
ndarray::aview2(&[
596
+
[1, 0, 0, 0, 0, 1, 1, 1, 1, 0],
597
+
[1, 0, 0, 1, 0, 1, 1, 0, 0, 0],
598
+
[1, 0, 1, 1, 0, 0, 1, 0, 0, 0],
599
+
[1, 1, 1, 1, 1, 1, 0, 1, 0, 1],
600
+
[0, 1, 0, 0, 0, 1, 0, 1, 0, 1],
601
+
[0, 1, 1, 1, 1, 1, 1, 1, 1, 1],
602
+
[0, 1, 1, 1, 0, 1, 0, 0, 1, 0],
603
+
[1, 1, 1, 1, 1, 1, 1, 1, 0, 1],
604
+
[1, 1, 0, 0, 0, 1, 1, 0, 1, 0],
605
+
[0, 0, 1, 1, 1, 0, 1, 0, 1, 0],
606
+
]),
607
+
),
608
+
(
609
+
TileId(2971),
610
+
ndarray::aview2(&[
611
+
[0, 0, 1, 0, 1, 0, 0, 0, 0, 1],
612
+
[1, 0, 0, 0, 1, 1, 1, 0, 0, 0],
613
+
[1, 0, 1, 0, 1, 1, 1, 0, 0, 0],
614
+
[1, 1, 0, 1, 1, 0, 0, 1, 0, 0],
615
+
[0, 1, 1, 1, 1, 1, 0, 0, 1, 1],
616
+
[0, 1, 0, 0, 1, 1, 1, 1, 0, 1],
617
+
[1, 0, 0, 1, 0, 1, 0, 0, 1, 0],
618
+
[0, 0, 1, 1, 1, 1, 0, 1, 1, 1],
619
+
[0, 0, 1, 0, 1, 0, 1, 1, 1, 0],
620
+
[0, 0, 0, 1, 0, 1, 0, 1, 0, 1],
621
+
]),
622
+
),
623
+
(
624
+
TileId(2729),
625
+
ndarray::aview2(&[
626
+
[0, 0, 0, 1, 0, 1, 0, 1, 0, 1],
627
+
[1, 1, 1, 1, 0, 1, 0, 0, 0, 0],
628
+
[0, 0, 1, 0, 1, 0, 0, 0, 0, 0],
629
+
[0, 0, 0, 0, 1, 0, 0, 1, 0, 1],
630
+
[0, 1, 1, 0, 0, 1, 1, 0, 1, 0],
631
+
[0, 1, 0, 1, 1, 1, 1, 0, 0, 0],
632
+
[1, 1, 1, 1, 0, 1, 0, 1, 0, 0],
633
+
[1, 1, 0, 1, 1, 1, 1, 0, 0, 0],
634
+
[1, 1, 0, 0, 1, 0, 1, 1, 0, 0],
635
+
[1, 0, 1, 1, 0, 0, 0, 1, 1, 0],
636
+
]),
637
+
),
638
+
(
639
+
TileId(3079),
640
+
ndarray::aview2(&[
641
+
[1, 0, 1, 0, 1, 1, 1, 1, 1, 0],
642
+
[0, 1, 0, 0, 1, 1, 1, 1, 1, 1],
643
+
[0, 0, 1, 0, 0, 0, 0, 0, 0, 0],
644
+
[1, 1, 1, 1, 1, 1, 0, 0, 0, 0],
645
+
[1, 1, 1, 1, 0, 1, 0, 0, 1, 0],
646
+
[0, 1, 0, 0, 0, 1, 0, 1, 1, 0],
647
+
[1, 0, 1, 1, 1, 1, 1, 0, 1, 1],
648
+
[0, 0, 1, 0, 1, 1, 1, 0, 0, 0],
649
+
[0, 0, 1, 0, 0, 0, 0, 0, 0, 0],
650
+
[0, 0, 1, 0, 1, 1, 1, 0, 0, 0],
651
+
]),
652
+
),
653
+
];
654
+
655
+
const EXAMPLE_PUZZLE: ndarray::ArrayView2<u8> = ndarray::aview2(&[
656
+
[
657
+
0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1,
658
+
],
659
+
[
660
+
1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0,
661
+
],
662
+
[
663
+
1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0,
664
+
],
665
+
[
666
+
1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1,
667
+
],
668
+
[
669
+
1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1,
670
+
],
671
+
[
672
+
0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1,
673
+
],
674
+
[
675
+
0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0,
676
+
],
677
+
[
678
+
0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
679
+
],
680
+
[
681
+
1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0,
682
+
],
683
+
[
684
+
1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0,
685
+
],
686
+
[
687
+
1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1,
688
+
],
689
+
[
690
+
1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1,
691
+
],
692
+
[
693
+
1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0,
694
+
],
695
+
[
696
+
0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1,
697
+
],
698
+
[
699
+
0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0,
700
+
],
701
+
[
702
+
1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0,
703
+
],
704
+
[
705
+
0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0,
706
+
],
707
+
[
708
+
0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1,
709
+
],
710
+
[
711
+
0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1,
712
+
],
713
+
[
714
+
1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0,
715
+
],
716
+
[
717
+
1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1,
718
+
],
719
+
[
720
+
1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1,
721
+
],
722
+
[
723
+
0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0,
724
+
],
725
+
[
726
+
0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1,
727
+
],
728
+
]);
729
+
730
+
const PURGED_EXAMPLE: &str = "\
731
+
.####...#####..#...###..
732
+
#####..#..#.#.####..#.#.
733
+
.#.#...#.###...#.##.O#..
734
+
#.O.##.OO#.#.OO.##.OOO##
735
+
..#O.#O#.O##O..O.#O##.##
736
+
...#.#..##.##...#..#..##
737
+
#.##.#..#.#..#..##.#.#..
738
+
.###.##.....#...###.#...
739
+
#.####.#.#....##.#..#.#.
740
+
##...#..#....#..#...####
741
+
..#.##...###..#.#####..#
742
+
....#.##.#.#####....#...
743
+
..##.##.###.....#.##..#.
744
+
#...#...###..####....##.
745
+
.#.##...#.##.#.#.###...#
746
+
#.###.#..####...##..#...
747
+
#.###...#.##...#.##O###.
748
+
.O##.#OO.###OO##..OOO##.
749
+
..O#.O..O..O.#O##O##.###
750
+
#.#..##.########..#..##.
751
+
#.#####..#.#...##..#....
752
+
#....##..#.#########..##
753
+
#...#.....#..##...###.##
754
+
#..###....##.#...##.##.#";
755
+
}
+2
-2
aoc_2020/src/main.rs
+2
-2
aoc_2020/src/main.rs
···
19
19
mod day17;
20
20
mod day18;
21
21
mod day19;
22
-
// mod day20;
22
+
mod day20;
23
23
// mod day21;
24
24
// mod day22;
25
25
// mod day23;
···
50
50
door!(2020-12-17 ~> day17),
51
51
door!(2020-12-18 ~> day18),
52
52
door!(2020-12-19 ~> day19),
53
-
// door!(2020-12-20 ~> day20),
53
+
door!(2020-12-20 ~> day20),
54
54
// door!(2020-12-21 ~> day21),
55
55
// door!(2020-12-22 ~> day22),
56
56
// door!(2020-12-23 ~> day23),