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Author SHA1 Message Date
Lucy 1983167252 feat: day 3 2024-12-03 11:27:45 +01:00
Lucy 5b722a30d6 rewrite main fn 2024-12-03 08:30:50 +01:00
8 changed files with 455 additions and 11 deletions

381
Cargo.lock generated
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@ -2,6 +2,387 @@
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@ -7,3 +7,7 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
color-eyre = "0.6.3"
regex = "1.11.1"
tracing = "0.1.41"
tracing-subscriber = "0.3.19"

1
inputs/day03/example.txt Normal file
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@ -0,0 +1 @@
xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))

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@ -0,0 +1 @@
xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))

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@ -33,7 +33,7 @@ pub fn pt2(input: &str) -> usize {
mod tests {
use std::fs::read_to_string;
use crate::day01::{pt1, pt2};
use super::{pt1, pt2};
#[test]
pub fn test_pt1() {

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@ -46,7 +46,7 @@ pub fn pt2(input: &str) -> usize {
mod tests {
use std::fs::read_to_string;
use crate::day02::{pt1, pt2};
use super::{pt1, pt2};
#[test]
pub fn test_pt1() {

42
src/day03.rs Normal file
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@ -0,0 +1,42 @@
use regex::Regex;
pub fn pt1(input: &str) -> usize {
let re = Regex::new(r"mul\((\d+),(\d+)\)").unwrap();
re.captures_iter(input)
.map(|c| c.extract())
.map(|(_, [x, y])| x.parse::<usize>().unwrap() * y.parse::<usize>().unwrap())
.sum()
}
pub fn pt2(input: &str) -> usize {
let re = Regex::new(r"mul\((\d+),(\d+)\)").unwrap();
re.captures_iter(
&Regex::new(r"don't\(\).*?do\(\)")
.unwrap()
.replace_all(&input.replace('\n', ""), ""),
)
.map(|c| c.extract())
.map(|(_, [x, y])| x.parse::<usize>().unwrap() * y.parse::<usize>().unwrap())
.sum()
}
#[cfg(test)]
mod tests {
use std::fs::read_to_string;
use super::{pt1, pt2};
#[test]
pub fn test_pt1() {
let input =
read_to_string("./inputs/day03/example.txt").expect("Missing example.txt for day03");
assert_eq!(pt1(&input), 161)
}
#[test]
pub fn test_pt2() {
let input = read_to_string("./inputs/day03/example_2.txt")
.expect("Missing example_2.txt for day03");
assert_eq!(pt2(&input), 48)
}
}

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@ -1,14 +1,29 @@
use std::fs::read_to_string;
use std::{fmt::Display, fs::read_to_string, time::Instant};
mod day01;
mod day02;
mod day03;
fn main() {
println!("day 01!");
let input = read_to_string("./inputs/day01/input.txt").expect("Missing input.txt for day01");
println!("And the result is: {}", day01::pt1(&input));
println!("Part 2: {}", day01::pt2(&input));
println!("day 02!");
let input = read_to_string("./inputs/day02/input.txt").expect("Missing input.txt for day02");
println!("And the result is: {}", day02::pt1(&input));
println!("Part 2: {}", day02::pt2(&input));
color_eyre::install().unwrap();
tracing_subscriber::fmt::init();
solve_day(1, day01::pt1, day01::pt2);
solve_day(2, day02::pt1, day02::pt2);
solve_day(3, day03::pt1, day03::pt2);
}
fn solve_day<Fa, Fb, Ta, Tb>(day: u8, part_a: Fa, part_b: Fb)
where
Fa: Fn(&str) -> Ta,
Ta: Display,
Fb: Fn(&str) -> Tb,
Tb: Display,
{
let input = read_to_string(format!("./inputs/day{day:02}/input.txt"))
.unwrap_or_else(|_| panic!("Missing input.txt for day{day:02}"));
let start = Instant::now();
let result_a = part_a(&input);
tracing::info!("[{day:02}] Part A: {result_a} \tin {:?}", start.elapsed());
let start = Instant::now();
let result_b = part_b(&input);
tracing::info!("[{day:02}] Part B: {result_b} \tin {:?}", start.elapsed());
}