Day 20
This commit is contained in:
Zoé Cassiopée Gauthier
parent
8384ef7a95
commit
e37e81188d
@ -78,3 +78,7 @@ path = "src/day18.rs"
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[[bin]]
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name = "day19"
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path = "src/day19.rs"
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[[bin]]
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name = "day20"
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path = "src/day20.rs"
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102
inputs/day20.txt
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102
inputs/day20.txt
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@ -0,0 +1,102 @@
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##....#..#####...#######...##.#..####.###.##..###.####.#....##.##.##.#.#####.#.#.#..##.#...#.##.##.#...###.####..###..##.#.#.#....#.#.#..##.....#.##.#.....#..###...##...#####.##.#..#.....#.#.#.#.#.####.###...###..####..#....###..######....####.#..##.##.###.#..#.#.#.###..#.##...#.###.##.#.###.#...#...#....###.##...#.#####.#..#.##..#.##..###.#...###...#######.#.......#...##........######.#########..##.##...##.#...####.....#####....#######..#..###.#####..#.#......#.##..###.####..##...###.########..#.##..#..#..
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.#...#.#..#.###....#.##.####.########..###.#.#.#.#.###.#.#.##.##...######.#..#...#...#..#....##.####
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.##..#.##.##...####....#.##..####..##.##..#...#...#...######.#..##.#.....#.#......####...####...####
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#.#.####..#.##..##.###.#.#...#.#......##.###...####...#.##...#.#.#...#.#.##..##...#...##...###.#####
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#####..#.......#.###.#.######.##.###.#.###..###..##.#..#....#...#..##.##.#####..#.#.#.##......#.###.
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.###...##.#....#..##.######..........#.##..#.#....#.....#.#####..#.#..##......#..#...#.###.#.#.#...#
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13
src/day18.rs
13
src/day18.rs
@ -29,14 +29,14 @@ impl Value {
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fn number(&self) -> Option<u32> {
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match self {
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Self::Number(n, _) => Some(*n),
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_ => None
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_ => None,
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}
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}
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fn index(&self) -> Option<usize> {
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match self {
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Self::Number(_, i) => Some(*i),
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_ => None
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_ => None,
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}
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}
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@ -104,8 +104,7 @@ fn find_exploded(tree: &Value, depth: usize) -> Option<&Value> {
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if depth == 4 && tree.is_number_pair() {
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Some(tree)
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} else {
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find_exploded(left, depth + 1)
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.or_else(|| find_exploded(right, depth + 1))
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find_exploded(left, depth + 1).or_else(|| find_exploded(right, depth + 1))
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}
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} else {
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None
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@ -114,11 +113,13 @@ fn find_exploded(tree: &Value, depth: usize) -> Option<&Value> {
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fn find_number(tree: &mut Value, index: usize, n: u32) -> Option<&Value> {
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match tree {
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Value::Pair(left, right) => find_number(left, index, n).or_else(|| find_number(right, index, n)),
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Value::Pair(left, right) => {
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find_number(left, index, n).or_else(|| find_number(right, index, n))
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}
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Value::Number(_, i) if *i == index => {
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tree.add_number(n);
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Some(tree)
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},
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}
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_ => None,
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}
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}
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@ -17,15 +17,16 @@ impl FromStr for Report {
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fn make_diffs(reports: &Vec<Report>) -> HashSet<Report> {
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let mut set = HashSet::new();
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for (i, report) in reports.iter().enumerate() {
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}
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for (i, report) in reports.iter().enumerate() {}
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set
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}
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fn main() {
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const INPUT: &str = include_str!("../inputs/day19.txt");
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let reports = INPUT.split("\n\n").map(|scanner| scanner.lines().map(|line| line.parse().unwrap()).collect()).collect::<Vec<Vec<Report>>>();
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let reports = INPUT
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.split("\n\n")
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.map(|scanner| scanner.lines().map(|line| line.parse().unwrap()).collect())
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.collect::<Vec<Vec<Report>>>();
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let diffs: Vec<HashSet<Report>> = reports.iter().map(make_diffs).collect();
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println!("solution {}", diffs.len());
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}
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158
src/day20.rs
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158
src/day20.rs
Normal file
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use std::fmt;
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use std::str::FromStr;
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#[derive(Clone)]
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struct Image {
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image: Vec<Vec<char>>,
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algorithm: Vec<char>,
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background: bool,
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}
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impl Image {
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fn is_light(&self, x: i32, y: i32) -> bool {
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if x < 1 || y < 1 || x as usize > self.image[0].len() || y as usize > self.image.len() {
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return self.background;
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}
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match self.image[(y - 1) as usize][(x - 1) as usize] {
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'#' => true,
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'.' => false,
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p => panic!("invalid pixel '{}'", p),
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}
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}
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fn enhance(self) -> Self {
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let image = (0..self.image.len() + 2)
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.map(|y| {
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(0..self.image[0].len() + 2)
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.map(|x| {
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let mut idx = 0;
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if self.is_light(x as i32 - 1, y as i32 - 1) {
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idx += 0x100;
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}
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if self.is_light(x as i32, y as i32 - 1) {
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idx += 0x080;
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}
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if self.is_light(x as i32 + 1, y as i32 - 1) {
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idx += 0x040;
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}
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if self.is_light(x as i32 - 1, y as i32) {
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idx += 0x020;
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}
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if self.is_light(x as i32, y as i32) {
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idx += 0x010;
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}
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if self.is_light(x as i32 + 1, y as i32) {
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idx += 0x008;
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}
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if self.is_light(x as i32 - 1, y as i32 + 1) {
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idx += 0x004;
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}
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if self.is_light(x as i32, y as i32 + 1) {
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idx += 0x002;
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}
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if self.is_light(x as i32 + 1, y as i32 + 1) {
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idx += 0x001;
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}
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self.algorithm[idx]
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})
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.collect()
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})
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.collect();
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let background = if self.algorithm[0] == '#' {
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!self.background
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} else {
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false
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};
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Image {
|
||||
image,
|
||||
algorithm: self.algorithm,
|
||||
background,
|
||||
}
|
||||
}
|
||||
|
||||
fn light_pixels(self) -> usize {
|
||||
let result = self.enhance().enhance();
|
||||
result
|
||||
.image
|
||||
.iter()
|
||||
.map(|row| row.iter().filter(|p| **p == '#').count())
|
||||
.sum()
|
||||
}
|
||||
|
||||
fn super_light_pixels(self) -> usize {
|
||||
let mut image = self;
|
||||
for _ in 0..50 {
|
||||
image = image.enhance();
|
||||
}
|
||||
image
|
||||
.image
|
||||
.iter()
|
||||
.map(|row| row.iter().filter(|p| **p == '#').count())
|
||||
.sum()
|
||||
}
|
||||
}
|
||||
|
||||
impl FromStr for Image {
|
||||
type Err = ();
|
||||
|
||||
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
||||
let (algorithm, image) = s.split_once("\n\n").unwrap();
|
||||
let algorithm = algorithm.chars().collect();
|
||||
let image = image
|
||||
.lines()
|
||||
.map(|line| line.trim_end().chars().collect())
|
||||
.collect();
|
||||
Ok(Image {
|
||||
image,
|
||||
algorithm,
|
||||
background: false,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Debug for Image {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
writeln!(
|
||||
f,
|
||||
"algorithm: {}\n",
|
||||
self.algorithm.iter().collect::<String>()
|
||||
)?;
|
||||
for row in self.image.iter() {
|
||||
writeln!(f, "{}", row.iter().collect::<String>())?;
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
const INPUT: &str = include_str!("../inputs/day20.txt");
|
||||
let image: Image = INPUT.parse().unwrap();
|
||||
println!("solution {}", image.clone().light_pixels());
|
||||
println!("solution {}", image.super_light_pixels());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_light_pixels() {
|
||||
const INPUT: &str = "..#.#..#####.#.#.#.###.##.....###.##.#..###.####..#####..#....#..#..##..###..######.###...####..#..#####..##..#.#####...##.#.#..#.##..#.#......#.###.######.###.####...#.##.##..#..#..#####.....#.#....###..#.##......#.....#..#..#..##..#...##.######.####.####.#.#...#.......#..#.#.#...####.##.#......#..#...##.#.##..#...##.#.##..###.#......#.#.......#.#.#.####.###.##...#.....####.#..#..#.##.#....##..#.####....##...##..#...#......#.#.......#.......##..####..#...#.#.#...##..#.#..###..#####........#..####......#..#
|
||||
|
||||
#..#.
|
||||
#....
|
||||
##..#
|
||||
..#..
|
||||
..###";
|
||||
let image: Image = INPUT.parse().unwrap();
|
||||
assert_eq!(image.light_pixels(), 35);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_super_light_pixels() {
|
||||
const INPUT: &str = "..#.#..#####.#.#.#.###.##.....###.##.#..###.####..#####..#....#..#..##..###..######.###...####..#..#####..##..#.#####...##.#.#..#.##..#.#......#.###.######.###.####...#.##.##..#..#..#####.....#.#....###..#.##......#.....#..#..#..##..#...##.######.####.####.#.#...#.......#..#.#.#...####.##.#......#..#...##.#.##..#...##.#.##..###.#......#.#.......#.#.#.####.###.##...#.....####.#..#..#.##.#....##..#.####....##...##..#...#......#.#.......#.......##..####..#...#.#.#...##..#.#..###..#####........#..####......#..#
|
||||
|
||||
#..#.
|
||||
#....
|
||||
##..#
|
||||
..#..
|
||||
..###";
|
||||
let image: Image = INPUT.parse().unwrap();
|
||||
assert_eq!(image.super_light_pixels(), 3351);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user