Stefan Bühler
1 year ago
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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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...#...#.#......#...#....#..... |
|||
.###.......#.........#......... |
|||
....##.#......#...###......##.# |
|||
.###...#..##.....##.......#.... |
|||
.#.#...#..#.##....#........#... |
|||
File diff suppressed because it is too large
@ -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() |
|||
} |
|||
} |
|||
Loading…
Reference in new issue