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4 commits

Author SHA1 Message Date
Xiretza 4535a4d3e7 2023 day6/rust: add solution 2023-12-06 16:00:49 +00:00
Xiretza f618e1620d 2023 day6: add data 2023-12-06 16:00:39 +00:00
Xiretza 3109623176 2023 day4/rust: add solution 2023-12-06 13:41:46 +00:00
Xiretza a4568c199b 2023 day4: add data 2023-12-06 13:41:06 +00:00
10 changed files with 381 additions and 0 deletions

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Card 192: 42 88 68 56 93 48 9 52 20 70 | 30 93 42 4 68 70 36 56 9 15 88 98 64 67 33 91 20 61 50 27 13 94 52 48 85
Card 193: 46 57 19 40 9 7 47 33 86 11 | 65 54 38 43 82 55 79 51 77 73 74 97 75 96 6 47 62 88 92 18 84 48 41 29 52
Card 194: 58 23 35 79 82 72 44 93 12 43 | 43 60 2 24 77 48 61 25 44 75 35 12 93 51 36 72 6 31 29 50 37 80 19 14 87
Card 195: 15 77 78 50 36 83 68 52 86 26 | 16 72 67 88 14 81 34 24 71 32 91 77 90 1 98 95 7 28 49 84 86 20 44 73 56
Card 196: 25 3 32 15 1 56 27 51 82 81 | 87 79 15 11 98 54 56 88 18 92 69 25 66 27 60 58 44 1 51 3 32 81 12 72 41
Card 197: 3 99 81 8 93 28 76 7 27 48 | 78 98 85 5 93 77 72 62 69 82 50 9 35 74 18 10 33 67 90 31 79 84 58 29 17
Card 198: 26 81 19 24 59 82 8 95 86 17 | 13 22 10 96 19 20 88 3 90 78 24 9 50 34 6 94 7 60 44 76 31 81 26 33 43
Card 199: 77 91 58 16 47 94 23 30 88 5 | 38 66 12 25 95 67 72 89 36 45 63 15 54 98 74 57 32 39 59 28 7 62 82 13 26
Card 200: 82 47 52 12 83 4 26 93 33 9 | 31 30 91 2 6 27 28 1 81 8 75 92 56 57 41 24 72 85 53 74 59 11 66 32 54
Card 201: 4 13 26 57 84 17 63 10 98 56 | 72 85 68 47 44 60 54 34 38 16 8 11 23 84 32 18 69 13 26 35 9 73 43 15 89
Card 202: 11 9 1 42 71 78 97 89 8 10 | 33 17 81 48 60 96 69 37 12 46 73 4 76 54 86 91 28 5 51 98 99 84 13 85 32
Card 203: 37 80 7 87 79 60 6 49 16 12 | 23 34 15 46 38 20 27 45 33 97 37 14 68 83 49 79 43 70 57 60 11 63 24 35 73
Card 204: 84 24 48 76 7 18 77 37 69 5 | 88 39 92 94 34 37 11 40 85 35 2 81 73 58 42 66 83 9 56 12 14 51 62 20 7
Card 205: 5 84 4 6 95 77 59 67 74 35 | 58 47 29 34 79 86 35 89 71 96 27 64 90 48 37 78 1 39 46 21 98 91 43 8 56
Card 206: 56 21 34 13 1 17 99 11 76 60 | 36 24 83 31 50 19 82 32 61 9 98 71 79 39 97 37 29 13 27 10 52 22 41 40 59
Card 207: 62 7 22 90 51 96 12 13 36 52 | 48 37 70 24 73 51 83 3 5 77 29 87 23 18 26 76 19 97 20 86 84 14 63 33 21
Card 208: 40 42 5 91 29 59 70 49 23 94 | 82 81 30 61 64 65 19 9 67 75 92 16 26 52 73 43 55 35 17 93 39 90 74 53 51

2
2023/data/day6.expected Normal file
View file

@ -0,0 +1,2 @@
2269432
35865985

2
2023/data/day6.input Normal file
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@ -0,0 +1,2 @@
Time: 49 78 79 80
Distance: 298 1185 1066 1181

View file

@ -0,0 +1,9 @@
[package]
name = "rust_2023_04"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
aoc = { path = "../../../common/rust" }

View file

@ -0,0 +1,69 @@
#![warn(clippy::pedantic)]
use std::{io::stdin, num::NonZeroU32};
#[derive(Debug, Clone, PartialEq, Eq)]
struct Card {
winning: Vec<usize>,
found: Vec<usize>,
}
impl Card {
pub fn parse(s: &str) -> Self {
fn get_numbers(s: &str) -> Vec<usize> {
s.split(' ')
.filter(|s| !s.is_empty())
.map(|n| n.parse().unwrap())
.collect()
}
let (_id, numbers) = s.split_once(": ").unwrap();
let (winning, found) = numbers.split_once(" | ").unwrap();
let winning = get_numbers(winning);
let found = get_numbers(found);
Self { winning, found }
}
pub fn num_matching(&self) -> usize {
self.found
.iter()
.filter(|n| self.winning.contains(n))
.count()
}
pub fn exp_score(&self) -> usize {
if let Some(matching) = NonZeroU32::new(u32::try_from(self.num_matching()).unwrap()) {
2_usize.pow(matching.get() - 1)
} else {
0
}
}
pub fn recursive_score(&self, previous: &[usize]) -> usize {
1 + previous
.iter()
.rev()
.take(self.num_matching())
.sum::<usize>()
}
}
fn main() {
let cards: Vec<Card> = stdin().lines().map(|l| Card::parse(&l.unwrap())).collect();
println!("{}", cards.iter().map(Card::exp_score).sum::<usize>());
let recursive_score: usize = cards
.iter()
.rev()
.fold(Vec::new(), |mut previous, card| {
let score = card.recursive_score(&previous);
previous.push(score);
previous
})
.iter()
.sum();
println!("{recursive_score}");
}

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@ -0,0 +1,9 @@
[package]
name = "rust_2023_06"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
aoc = { path = "../../../common/rust" }

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@ -0,0 +1,64 @@
#![warn(clippy::pedantic)]
use std::io::stdin;
fn calculate_score<I: IntoIterator<Item = (u64, u64)>>(races: I) -> u64 {
races
.into_iter()
.map(|(t, r)| {
// x(t-x) = r
// tx-x^2 = r
// x^2-tx+r = 0
// [ x^2+px+q = 0 ==> x = -p/2±sqrt((p/2)^2-q) ]
// x = t/2 ± sqrt(t^2/4-r)
#[allow(clippy::cast_precision_loss)]
let t = t as f64;
#[allow(clippy::cast_precision_loss)]
let r = r as f64;
let v = t / 2.0;
let w = (t.powi(2) / 4.0 - r).sqrt();
#[allow(clippy::cast_possible_truncation, clippy::cast_sign_loss)]
((v - w + 1.0).floor() as u64, (v + w - 1.0).ceil() as u64)
})
.map(|(min, max)| max - min + 1)
.product()
}
fn make_races<F>(
times_line: &str,
records_line: &str,
make_numbers: F,
) -> impl Iterator<Item = (u64, u64)>
where
F: Fn(&[&str]) -> Vec<u64>,
{
let do_line = |line: &str| {
let parts: Vec<_> = line.split(' ').filter(|s| !s.is_empty()).skip(1).collect();
make_numbers(&parts)
};
do_line(times_line).into_iter().zip(do_line(records_line))
}
fn main() {
let mut lines = stdin().lines().map(Result::unwrap);
let times = lines.next().unwrap();
let records = lines.next().unwrap();
println!(
"{}",
calculate_score(make_races(&times, &records, |parts| {
parts.iter().map(|n| n.parse().unwrap()).collect()
}))
);
println!(
"{}",
calculate_score(make_races(&times, &records, |parts| {
vec![parts.iter().copied().collect::<String>().parse().unwrap()]
}))
);
}

14
Cargo.lock generated
View file

@ -663,6 +663,13 @@ dependencies = [
"enum-map",
]
[[package]]
name = "rust_2023_04"
version = "0.1.0"
dependencies = [
"aoc",
]
[[package]]
name = "rust_2023_05"
version = "0.1.0"
@ -670,6 +677,13 @@ dependencies = [
"aoc",
]
[[package]]
name = "rust_2023_06"
version = "0.1.0"
dependencies = [
"aoc",
]
[[package]]
name = "rustversion"
version = "1.0.11"

View file

@ -29,5 +29,7 @@ members = [
"2022/day18/rust",
"2023/day1/rust",
"2023/day2/rust",
"2023/day4/rust",
"2023/day5/rust",
"2023/day6/rust",
]