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✨ Day 4: Solved part 1!

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LeMoonStar 2024-12-04 19:33:28 +01:00
parent bb4c059b25
commit 134512e4ba
1 changed files with 85 additions and 62 deletions
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147
src/days/d04.rs
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@ -30,77 +30,100 @@ impl LetterWall {
}
}
fn is_upper_left_of_xmas(&self, x: usize, y: usize) -> Option<Direction> {
#[rustfmt::skip]
match(
self.at( x, y), self.at( x+1, y), self.at( x+2, y), self.at( x+3, y),
self.at( x, y+1), self.at( x+1, y+1), self.at( x+2, y+1), self.at( x+3, y+1),
self.at( x, y+2), self.at( x+1, y+2), self.at( x+2, y+2), self.at( x+3, y+2),
self.at( x, y+3), self.at( x+1, y+3), self.at( x+2, y+3), self.at( x+3, y+3)
) {
(
Some('X'), Some('M'), Some('A'), Some('S'),
_, _, _, _,
_, _, _, _,
_, _, _, _
) => Some(Direction::East),
(
Some('S'), Some('A'), Some('M'), Some('X'),
_, _, _, _,
_, _, _, _,
_, _, _, _
) => Some(Direction::West),
(
Some('X'), _, _, _,
Some('M'), _, _, _,
Some('A'), _, _, _,
Some('S'), _, _, _
) => Some(Direction::South),
(
Some('S'), _, _, _,
Some('A'), _, _, _,
Some('M'), _, _, _,
Some('X'), _, _, _
) => Some(Direction::North),
(
Some('X'), _, _, _,
_, Some('M'), _, _,
_, _, Some('A'), _,
_, _, _, Some('S')
) => Some(Direction::SouthEast),
(
Some('S'), _, _, _,
_, Some('A'), _, _,
_, _, Some('M'), _,
_, _, _, Some('X')
) => Some(Direction::NorthWest),
(
_, _, _, Some('X'),
_, _, Some('M'), _,
_, Some('A'), _, _,
Some('S'), _, _, _
) => Some(Direction::SouthWest),
(
_, _, _, Some('S'),
_, _, Some('A'), _,
_, Some('M'), _, _,
Some('X'), _, _, _
) => Some(Direction::NorthEast),
_ => None
#[rustfmt::skip]
fn get_xmas_directions(&self, x: usize, y: usize) -> Vec<Direction> {
let mut directions = vec!();
let map = (
self.at(x, y), self.at(x+1, y), self.at(x+2, y), self.at(x+3, y),
self.at(x, y+1), self.at(x+1, y+1), self.at(x+2, y+1), self.at(x+3, y+1),
self.at(x, y+2), self.at(x+1, y+2), self.at(x+2, y+2), self.at(x+3, y+2),
self.at(x, y+3), self.at(x+1, y+3), self.at(x+2, y+3), self.at(x+3, y+3)
);
if let (
Some(&'X'), Some(&'M'), Some(&'A'), Some(&'S'),
_, _, _, _,
_, _, _, _,
_, _, _, _
) = map {
directions.push(Direction::East);
}
if let (
Some('S'), Some('A'), Some('M'), Some('X'),
_, _, _, _,
_, _, _, _,
_, _, _, _
) = map {
directions.push(Direction::West);
}
if let (
Some('X'), _, _, _,
Some('M'), _, _, _,
Some('A'), _, _, _,
Some('S'), _, _, _
) = map {
directions.push(Direction::South);
}
if let (
Some('S'), _, _, _,
Some('A'), _, _, _,
Some('M'), _, _, _,
Some('X'), _, _, _
) = map {
directions.push(Direction::North);
}
if let (
Some('X'), _, _, _,
_, Some('M'), _, _,
_, _, Some('A'), _,
_, _, _, Some('S')
) = map {
directions.push(Direction::SouthEast);
}
if let (
Some('S'), _, _, _,
_, Some('A'), _, _,
_, _, Some('M'), _,
_, _, _, Some('X')
) = map {
directions.push(Direction::NorthWest);
}
if let (
_, _, _, Some('X'),
_, _, Some('M'), _,
_, Some('A'), _, _,
Some('S'), _, _, _
) = map {
directions.push(Direction::SouthWest);
}
if let (
_, _, _, Some('S'),
_, _, Some('A'), _,
_, Some('M'), _, _,
Some('X'), _, _, _
) = map {
directions.push(Direction::SouthEast);
}
directions
}
pub fn count_xmas(&self) -> u64 {
let mut count = 0;
for y in 0..self.0.len() {
for x in 0..self.0[0].len() {
if let Some(_dir) = self.is_upper_left_of_xmas(x, y) {
dprintln!("FOUND AT {} {} '{}' - DIR: {:?}", x, y, self.0[y][x], _dir);
count += 1;
}
count += self.get_xmas_directions(x, y).len();
}
}
return count;
return count as u64;
}
}