Stefan Bühler
5 months ago
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493336905c
12 changed files with 2972 additions and 0 deletions
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1.gitignore
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5Cargo.lock
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9Cargo.toml
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200data/day1/input
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1000data/day2/input
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323data/day3/input
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1146data/day4/input
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35src/bin/day1/main.rs
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69src/bin/day2/main.rs
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65src/bin/day3/main.rs
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13src/bin/day4/main.rs
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106src/bin/day4/passport.rs
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# This file is automatically @generated by Cargo. |
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# It is not intended for manual editing. |
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[[package]] |
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name = "aoc2020" |
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version = "0.1.0" |
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[package] |
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name = "aoc2020" |
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version = "0.1.0" |
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authors = ["Stefan Bühler <stbuehler@web.de>"] |
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edition = "2018" |
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html |
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.#.#...#......#..###...#.....#. |
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#.#..#...#..##.....#...#.#..#.. |
|||
.....#.#..........#..#......... |
|||
.###..##..##.....#...#...#..##. |
|||
#...#.#....#.......##..#....... |
|||
###...#.#.#..#.......#......#.. |
|||
....##........#..........##.... |
|||
............#....#...........#. |
|||
#..#.#....##..#.#..#......##... |
|||
.###....##...#....##..........# |
|||
.###........#........###.....#. |
|||
...#...#.#......#...#....#..... |
|||
.###.......#.........#......... |
|||
....##.#......#...###......##.# |
|||
.###...#..##.....##.......#.... |
|||
.#.#...#..#.##....#........#... |
|||
1146
data/day4/input
File diff suppressed because it is too large
View File
File diff suppressed because it is too large
View File
@ -0,0 +1,35 @@ |
|||
const INPUT: &str = include_str!("../../../data/day1/input");
|
|||
|
|||
fn main() {
|
|||
let expenses: Vec<_> = INPUT.split_whitespace().map(|s| s.parse::<u32>().unwrap()).collect();
|
|||
'outer: for (pos, &exp1) in expenses.iter().enumerate() {
|
|||
for &exp2 in expenses[pos+1..].iter() {
|
|||
if exp1 + exp2 == 2020 {
|
|||
println!(
|
|||
"Found: {exp1} + {exp2} = 2020; {exp1} * {exp2} = {}",
|
|||
exp1 * exp2,
|
|||
exp1 = exp1,
|
|||
exp2 = exp2,
|
|||
);
|
|||
break 'outer;
|
|||
}
|
|||
}
|
|||
}
|
|||
|
|||
'outer2: for (pos, &exp1) in expenses.iter().enumerate() {
|
|||
for (pos2, &exp2) in expenses[pos+1..].iter().enumerate() {
|
|||
for &exp3 in expenses[pos2+1..].iter() {
|
|||
if exp1 + exp2 + exp3 == 2020 {
|
|||
println!(
|
|||
"Found: {exp1} + {exp2} + {exp3} = 2020; {exp1} * {exp2} * {exp3} = {}",
|
|||
exp1 * exp2 * exp3,
|
|||
exp1 = exp1,
|
|||
exp2 = exp2,
|
|||
exp3 = exp3,
|
|||
);
|
|||
break 'outer2;
|
|||
}
|
|||
}
|
|||
}
|
|||
}
|
|||
}
|
|||
@ -0,0 +1,69 @@ |
|||
use std::convert::TryInto;
|
|||
|
|||
const INPUT: &str = include_str!("../../../data/day2/input");
|
|||
|
|||
struct Policy {
|
|||
min: usize,
|
|||
max: usize,
|
|||
chr: char,
|
|||
}
|
|||
|
|||
impl Policy {
|
|||
fn parse(text: &str) -> Self {
|
|||
let tokens: Vec<_> = text.trim().split_whitespace().collect();
|
|||
let [range, chr]: [&str; 2] = tokens.try_into().unwrap();
|
|||
let tokens: Vec<_> = range.split("-").collect();
|
|||
let [min, max]: [&str; 2] = tokens.try_into().unwrap();
|
|||
assert!(chr.len() == 1);
|
|||
let chr = chr.chars().next().unwrap();
|
|||
let min = min.parse::<usize>().unwrap();
|
|||
let max = max.parse::<usize>().unwrap();
|
|||
Self { min, max, chr }
|
|||
}
|
|||
|
|||
fn test(&self, input: &str) -> bool {
|
|||
let count = input.chars().filter(|&c| c == self.chr).count();
|
|||
count >= self.min && count <= self.max
|
|||
}
|
|||
|
|||
fn test_crazy(&self, input: &str) -> bool {
|
|||
let chars: Vec<_> = input.chars().collect();
|
|||
assert!(self.min > 0 && self.max > 0);
|
|||
assert!(self.min <= chars.len() && self.max <= chars.len());
|
|||
(chars[self.min-1] == self.chr) != (chars[self.max-1] == self.chr)
|
|||
}
|
|||
}
|
|||
|
|||
struct Entry {
|
|||
policy: Policy,
|
|||
password: String,
|
|||
}
|
|||
|
|||
impl Entry {
|
|||
fn parse(line: &str) -> Self {
|
|||
let tokens: Vec<_> = line.split(":").collect();
|
|||
let [policy, password]: [&str; 2] = tokens.try_into().unwrap();
|
|||
Self {
|
|||
policy: Policy::parse(policy),
|
|||
password: password.trim().into(),
|
|||
}
|
|||
}
|
|||
|
|||
fn parse_list(input: &str) -> Vec<Self> {
|
|||
input.lines().map(Self::parse).collect()
|
|||
}
|
|||
|
|||
fn valid(&self) -> bool {
|
|||
self.policy.test(&self.password)
|
|||
}
|
|||
|
|||
fn valid_crazy(&self) -> bool {
|
|||
self.policy.test_crazy(&self.password)
|
|||
}
|
|||
}
|
|||
|
|||
fn main() {
|
|||
let entries = Entry::parse_list(INPUT);
|
|||
println!("Valid entries: {}", entries.iter().filter(|e| e.valid()).count());
|
|||
println!("Crazy valid entries: {}", entries.iter().filter(|e| e.valid_crazy()).count());
|
|||
}
|
|||
@ -0,0 +1,65 @@ |
|||
const INPUT: &str = include_str!("../../../data/day3/input");
|
|||
|
|||
struct Forest {
|
|||
pub rows: usize,
|
|||
stride: usize,
|
|||
trees: Vec<bool>,
|
|||
}
|
|||
|
|||
impl Forest {
|
|||
fn parse(text: &str) -> Self {
|
|||
let first_line = text.lines().next().unwrap();
|
|||
let stride = first_line.len();
|
|||
let mut trees = Vec::new();
|
|||
let mut rows = 0;
|
|||
for line in text.lines() {
|
|||
assert_eq!(line.len(), stride);
|
|||
trees.extend(line.as_bytes().iter().map(|&c| c == b'#'));
|
|||
rows += 1;
|
|||
}
|
|||
Self {
|
|||
rows,
|
|||
stride,
|
|||
trees,
|
|||
}
|
|||
}
|
|||
|
|||
fn is_tree(&self, row: usize, column: u64) -> bool {
|
|||
assert!(row < self.rows);
|
|||
let column = (column % self.stride as u64) as usize;
|
|||
self.trees[column + row * self.stride]
|
|||
}
|
|||
|
|||
fn hit_trees(&self, slope_y: usize, slope_x: u64) -> u64 {
|
|||
let mut row = slope_y;
|
|||
let mut col = slope_x;
|
|||
let mut hits = 0;
|
|||
while row < self.rows {
|
|||
if self.is_tree(row, col) {
|
|||
hits += 1;
|
|||
}
|
|||
row += slope_y;
|
|||
col += slope_x;
|
|||
}
|
|||
hits
|
|||
}
|
|||
}
|
|||
|
|||
const TEST_SLOPES: &[(usize, u64)] = &[
|
|||
(1, 1),
|
|||
(1, 3),
|
|||
(1, 5),
|
|||
(1, 7),
|
|||
(2, 1),
|
|||
];
|
|||
|
|||
fn main() {
|
|||
let forest = Forest::parse(INPUT);
|
|||
println!("Hit trees: {}", forest.hit_trees(1, 3));
|
|||
println!(
|
|||
"Hit product: {}",
|
|||
TEST_SLOPES.iter().map(|(slope_y, slope_x)| {
|
|||
forest.hit_trees(*slope_y, *slope_x)
|
|||
}).product::<u64>(),
|
|||
);
|
|||
}
|
|||
@ -0,0 +1,13 @@ |
|||
pub mod passport;
|
|||
|
|||
use passport::Passport;
|
|||
|
|||
const INPUT: &str = include_str!("../../../data/day4/input");
|
|||
|
|||
fn main() {
|
|||
let passports = Passport::parse_list(INPUT);
|
|||
let all_required_fields: Vec<_> = passports.iter().filter(|p| p.require_all_but_country_id()).collect();
|
|||
println!("Required fields Passports: {}", all_required_fields.len());
|
|||
let valid: Vec<_> = passports.iter().filter(|p| p.valid()).collect();
|
|||
println!("Valid Passports: {}", valid.len());
|
|||
}
|
|||
@ -0,0 +1,106 @@ |
|||
#[derive(Clone, Debug, Default)]
|
|||
pub struct Passport {
|
|||
// "byr": birth_year
|
|||
pub birth_year: Option<String>,
|
|||
// "iyr": issue_year
|
|||
pub issue_year: Option<String>,
|
|||
// "eyr": expiration_year
|
|||
pub expiration_year: Option<String>,
|
|||
// "hgt": height
|
|||
pub height: Option<String>,
|
|||
// "hcl": hair_color
|
|||
pub hair_color: Option<String>,
|
|||
// "ecl": eye_color
|
|||
pub eye_color: Option<String>,
|
|||
// "pid": passport_id
|
|||
pub passport_id: Option<String>,
|
|||
// "cid": country_id
|
|||
pub country_id: Option<String>,
|
|||
}
|
|||
|
|||
impl Passport {
|
|||
pub fn parse(text: &str) -> Self {
|
|||
let mut result = Self::default();
|
|||
for token in text.split_whitespace() {
|
|||
let colon = token.find(':').expect("missing separator");
|
|||
let key = &token[..colon];
|
|||
let value = &token[colon+1..];
|
|||
match key {
|
|||
"byr" => result.birth_year = Some(value.into()),
|
|||
"iyr" => result.issue_year = Some(value.into()),
|
|||
"eyr" => result.expiration_year = Some(value.into()),
|
|||
"hgt" => result.height = Some(value.into()),
|
|||
"hcl" => result.hair_color = Some(value.into()),
|
|||
"ecl" => result.eye_color = Some(value.into()),
|
|||
"pid" => result.passport_id = Some(value.into()),
|
|||
"cid" => result.country_id = Some(value.into()),
|
|||
_ => panic!("unknown field {:?}", key),
|
|||
}
|
|||
}
|
|||
result
|
|||
}
|
|||
|
|||
pub fn parse_list(text: &str) -> Vec<Self> {
|
|||
text.split("\n\n").map(Self::parse).collect()
|
|||
}
|
|||
|
|||
pub fn require_all_but_country_id(&self) -> bool {
|
|||
self.birth_year.is_some() &
|
|||
self.issue_year.is_some() &
|
|||
self.expiration_year.is_some() &
|
|||
self.height.is_some() &
|
|||
self.hair_color.is_some() &
|
|||
self.eye_color.is_some() &
|
|||
self.passport_id.is_some()
|
|||
}
|
|||
|
|||
fn _valid(&self) -> Option<()> {
|
|||
let birth_year = self.birth_year.as_ref()?.parse::<u16>().ok()?;
|
|||
if birth_year < 1920 || birth_year > 2002 {
|
|||
return None;
|
|||
}
|
|||
let issue_year = self.issue_year.as_ref()?.parse::<u16>().ok()?;
|
|||
if issue_year < 2010 || issue_year > 2020 {
|
|||
return None;
|
|||
}
|
|||
let expiration_year = self.expiration_year.as_ref()?.parse::<u16>().ok()?;
|
|||
if expiration_year < 2020 || expiration_year > 2030 {
|
|||
return None;
|
|||
}
|
|||
let height = self.height.as_ref()?;
|
|||
if height.ends_with("cm") {
|
|||
let height = height[..height.len() - 2].parse::<u16>().ok()?;
|
|||
if height < 150 || height > 193 {
|
|||
return None;
|
|||
}
|
|||
} else if height.ends_with("in") {
|
|||
let height = height[..height.len() - 2].parse::<u16>().ok()?;
|
|||
if height < 59 || height > 76 {
|
|||
return None;
|
|||
}
|
|||
} else {
|
|||
return None;
|
|||
}
|
|||
let hair_color = self.hair_color.as_ref()?;
|
|||
if !hair_color.starts_with("#") || hair_color.len() != 7 {
|
|||
return None;
|
|||
}
|
|||
if !hair_color[1..].chars().all(|c| (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')) {
|
|||
return None;
|
|||
}
|
|||
let eye_color = self.eye_color.as_ref()?;
|
|||
match eye_color.as_str() {
|
|||
"amb"|"blu"|"brn"|"gry"|"grn"|"hzl"|"oth" => (),
|
|||
_ => return None,
|
|||
}
|
|||
let passport_id = self.passport_id.as_ref()?;
|
|||
if passport_id.len() != 9 || !passport_id.chars().all(|c| c.is_ascii_digit()) {
|
|||
return None;
|
|||
}
|
|||
Some(())
|
|||
}
|
|||
|
|||
pub fn valid(&self) -> bool {
|
|||
self._valid().is_some()
|
|||
}
|
|||
}
|
|||
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