feat: day 18
This commit is contained in:
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5 changed files with 2425 additions and 0 deletions
2176
.aoc-cache/18.txt
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2176
.aoc-cache/18.txt
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106
Cargo.lock
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106
Cargo.lock
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@ -35,6 +35,7 @@ dependencies = [
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"lru-cache",
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"peg",
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"petgraph",
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"rayon",
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"regex",
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"time",
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"ureq",
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@ -135,6 +136,55 @@ dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "crossbeam-channel"
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version = "0.5.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"
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dependencies = [
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"cfg-if",
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"crossbeam-utils",
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]
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[[package]]
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name = "crossbeam-deque"
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version = "0.8.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "715e8152b692bba2d374b53d4875445368fdf21a94751410af607a5ac677d1fc"
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dependencies = [
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"cfg-if",
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"crossbeam-epoch",
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"crossbeam-utils",
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]
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[[package]]
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name = "crossbeam-epoch"
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version = "0.9.13"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "01a9af1f4c2ef74bb8aa1f7e19706bc72d03598c8a570bb5de72243c7a9d9d5a"
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dependencies = [
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"autocfg",
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"cfg-if",
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"crossbeam-utils",
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"memoffset",
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"scopeguard",
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]
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[[package]]
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name = "crossbeam-utils"
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version = "0.8.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4fb766fa798726286dbbb842f174001dab8abc7b627a1dd86e0b7222a95d929f"
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dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "either"
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version = "1.8.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
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[[package]]
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name = "eyre"
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version = "0.6.8"
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@ -182,6 +232,15 @@ version = "0.12.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
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[[package]]
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name = "hermit-abi"
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version = "0.1.19"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
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dependencies = [
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"libc",
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]
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[[package]]
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name = "idna"
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version = "0.3.0"
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@ -259,6 +318,15 @@ version = "2.5.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
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[[package]]
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name = "memoffset"
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version = "0.7.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5de893c32cde5f383baa4c04c5d6dbdd735cfd4a794b0debdb2bb1b421da5ff4"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "miniz_oxide"
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version = "0.5.4"
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@ -277,6 +345,16 @@ dependencies = [
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"adler",
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]
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[[package]]
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name = "num_cpus"
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version = "1.14.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
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dependencies = [
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"hermit-abi",
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"libc",
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]
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[[package]]
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name = "object"
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version = "0.29.0"
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@ -365,6 +443,28 @@ dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "rayon"
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version = "1.6.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6db3a213adf02b3bcfd2d3846bb41cb22857d131789e01df434fb7e7bc0759b7"
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dependencies = [
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"either",
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"rayon-core",
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]
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[[package]]
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name = "rayon-core"
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version = "1.10.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cac410af5d00ab6884528b4ab69d1e8e146e8d471201800fa1b4524126de6ad3"
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dependencies = [
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"crossbeam-channel",
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"crossbeam-deque",
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"crossbeam-utils",
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"num_cpus",
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]
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[[package]]
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name = "regex"
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version = "1.7.0"
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@ -415,6 +515,12 @@ dependencies = [
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"webpki",
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]
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[[package]]
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name = "scopeguard"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
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[[package]]
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name = "sct"
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version = "0.7.0"
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@ -20,3 +20,4 @@ regex = "1.7.0"
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petgraph = "0.6.2"
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peg = "0.8.1"
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lru-cache = "0.1.2"
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rayon = "1.6.1"
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129
src/bin/day_18.rs
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129
src/bin/day_18.rs
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@ -0,0 +1,129 @@
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use std::{collections::{HashSet, HashMap}, ops::RangeInclusive};
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use aoc_2022::prelude::*;
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use rayon::prelude::*;
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type Coord = (isize, isize, isize);
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type Input = Vec<Coord>;
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fn parse(s: &str) -> Result<Input> {
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let mut coords = vec![];
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for line in s.lines() {
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let coord = ints(line);
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let coord = (coord[0], coord[1], coord[2]);
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coords.push(coord);
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}
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Ok(coords)
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}
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#[derive(Clone, Copy, Eq, Hash, PartialEq)]
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enum Face {
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X,
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Y,
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Z,
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}
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#[aoc(day = 18, parse = parse, test_cases = ["day_18.txt"])]
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fn day_18(input: Input) -> Result<()> {
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// Part 1
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let mut faces = HashSet::<(Face, Coord)>::new();
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for cube in &input {
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let cube_faces = [
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(Face::X, *cube),
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(Face::X, (cube.0 + 1, cube.1, cube.2)),
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(Face::Y, *cube),
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(Face::Y, (cube.0, cube.1 + 1, cube.2)),
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(Face::Z, *cube),
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(Face::Z, (cube.0, cube.1, cube.2 + 1)),
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];
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for face in cube_faces {
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if faces.contains(&face) {
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faces.remove(&face);
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} else {
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faces.insert(face);
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}
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}
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}
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println!("Part one: {}", faces.len());
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// Part 2
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let (x_range, y_range, z_range) = {
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let min_x = input.iter().map(|c| c.0).min().unwrap();
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let min_y = input.iter().map(|c| c.1).min().unwrap();
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let min_z = input.iter().map(|c| c.2).min().unwrap();
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let max_x = input.iter().map(|c| c.0).max().unwrap();
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let max_y = input.iter().map(|c| c.1).max().unwrap();
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let max_z = input.iter().map(|c| c.2).max().unwrap();
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(min_x..=max_x, min_y..=max_y, min_z..=max_z)
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};
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let corrected_sa = faces.par_iter().filter(|(face, coord)| {
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let other = match face {
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Face::X => (coord.0 - 1, coord.1, coord.2),
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Face::Y => (coord.0, coord.1 - 1, coord.2),
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Face::Z => (coord.0, coord.1, coord.2 - 1),
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};
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let mut cache = HashMap::new();
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can_reach_outside(&input, (&x_range, &y_range, &z_range), *coord, &HashSet::new(), &mut cache)
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|| can_reach_outside(&input, (&x_range, &y_range, &z_range), other, &HashSet::new(), &mut cache)
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}).count();
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println!("Part 2: {corrected_sa}");
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Ok(())
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}
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fn can_reach_outside(
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input: &Input,
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(x_range, y_range, z_range): (
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&RangeInclusive<isize>,
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&RangeInclusive<isize>,
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&RangeInclusive<isize>,
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),
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position: Coord,
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visited: &HashSet<Coord>,
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cache: &mut HashMap<Coord, bool>,
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) -> bool {
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if let Some(result) = cache.get(&position) {
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*result
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} else {
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let result = if x_range.contains(&position.0) && y_range.contains(&position.1) && z_range.contains(&position.2) {
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if input.contains(&position) {
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false
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} else {
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let mut visited = visited.clone();
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visited.insert(position);
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const DIRECTIONS: &[(isize, isize, isize)] = &[
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( 1, 0, 0),
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(-1, 0, 0),
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( 0, 1, 0),
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( 0, -1, 0),
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( 0, 0, 1),
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( 0, 0, -1),
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];
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let mut can_reach = false;
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for direction in DIRECTIONS {
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let new_position = (position.0 + direction.0, position.1 + direction.1, position.2 + direction.2);
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if visited.contains(&new_position) {
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continue;
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}
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if can_reach_outside(input, (x_range, y_range, z_range), new_position, &visited, cache) {
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can_reach = true;
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break;
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}
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}
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can_reach
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}
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} else {
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true
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};
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cache.insert(position, result);
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result
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}
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}
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13
test_cases/day_18.txt
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13
test_cases/day_18.txt
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@ -0,0 +1,13 @@
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2,2,2
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1,2,2
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3,2,2
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2,1,2
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2,3,2
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2,2,1
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2,2,3
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2,2,4
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2,2,6
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1,2,5
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3,2,5
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2,1,5
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2,3,5
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