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✨ Day 4: Solved part 2!

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LeMoonStar 2024-12-04 19:38:35 +01:00
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commit 2d89799e44
2 changed files with 48 additions and 5 deletions
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4
README.md
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@ -3,8 +3,8 @@
[![About](https://img.shields.io/badge/Advent%20of%20Code-2024-brightgreen?style=flat-square)](https://adventofcode.com/2024/about) [![About](https://img.shields.io/badge/Advent%20of%20Code-2024-brightgreen?style=flat-square)](https://adventofcode.com/2024/about)
[![Language: Rust](https://img.shields.io/badge/Language-Rust-orange.svg?style=flat-square)](https://en.wikipedia.org/wiki/Rust_(programming_language)) [![Language: Rust](https://img.shields.io/badge/Language-Rust-orange.svg?style=flat-square)](https://en.wikipedia.org/wiki/Rust_(programming_language))
[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://mit-license.org/) [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://mit-license.org/)
![Days completed](https://img.shields.io/badge/Days%20completed-2.5-red?style=flat-square) ![Days completed](https://img.shields.io/badge/Days%20completed-3.5-red?style=flat-square)
![Stars](https://img.shields.io/badge/Stars-5-yellow?style=flat-square) ![Stars](https://img.shields.io/badge/Stars-7-yellow?style=flat-square)
> ⚠️ This README is copied from my previous years solution. It is not fully adopted to 2024 yet. > ⚠️ This README is copied from my previous years solution. It is not fully adopted to 2024 yet.

49
src/days/d04.rs
View file

@ -116,6 +116,38 @@ impl LetterWall {
directions directions
} }
#[rustfmt::skip]
fn is_cross_mas(&self, x: usize, y: usize) -> bool {
match(
self.at( x, y), self.at( x+1, y), self.at( x+2, y),
self.at( x, y+1), self.at( x+1, y+1), self.at( x+2, y+1),
self.at( x, y+2), self.at( x+1, y+2), self.at( x+2, y+2)
) {
(
Some('M'), _,Some('S'),
_, Some('A'), _,
Some('M'), _, Some('S'),
) => true,
(
Some('S'), _,Some('S'),
_, Some('A'), _,
Some('M'), _, Some('M'),
) => true,
(
Some('M'), _,Some('M'),
_, Some('A'), _,
Some('S'), _, Some('S'),
) => true,
(
Some('S'), _,Some('M'),
_, Some('A'), _,
Some('S'), _, Some('M'),
) => true,
_ => false
}
}
pub fn count_xmas(&self) -> u64 { pub fn count_xmas(&self) -> u64 {
let mut count = 0; let mut count = 0;
for y in 0..self.0.len() { for y in 0..self.0.len() {
@ -125,6 +157,18 @@ impl LetterWall {
} }
return count as u64; return count as u64;
} }
pub fn count_cross_mas(&self) -> u64 {
let mut count = 0;
for y in 0..self.0.len() {
for x in 0..self.0[0].len() {
if self.is_cross_mas(x, y) {
count += 1;
}
}
}
return count as u64;
}
} }
impl From<&str> for LetterWall { impl From<&str> for LetterWall {
@ -141,7 +185,7 @@ impl DayImpl<Data> for Day<CURRENT_DAY> {
} }
fn expected_results() -> (Answer, Answer) { fn expected_results() -> (Answer, Answer) {
(Answer::Number(18), Answer::Number(0)) (Answer::Number(18), Answer::Number(9))
} }
fn init(input: &str) -> (Self, Data) { fn init(input: &str) -> (Self, Data) {
@ -149,11 +193,10 @@ impl DayImpl<Data> for Day<CURRENT_DAY> {
} }
fn one(&self, data: &mut Data) -> Answer { fn one(&self, data: &mut Data) -> Answer {
// NOTE TO SELF: Actual result above 2334
Answer::Number(data.count_xmas()) Answer::Number(data.count_xmas())
} }
fn two(&self, data: &mut Data) -> Answer { fn two(&self, data: &mut Data) -> Answer {
Answer::Number(0) Answer::Number(data.count_cross_mas())
} }
} }