Gobidev/adventofcode2024
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Clean up day20

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This commit is contained in:
Adrian Groh 2024-12-20 13:31:25 +01:00
parent dfa6d05f59
commit 6dc6f04368
Signed by: Gobidev
GPG Key ID: 3AA3153E98B0D771
1 changed files with 19 additions and 21 deletions
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28
day20/src/main.rs
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@ -24,7 +24,7 @@ impl Direction {
vec![Up, Left, Down, Right]
}
fn turn_right(&self) -> Self {
fn turn(&self) -> Self {
match self {
Up => Right,
Left => Up,
@ -99,36 +99,34 @@ fn get_distances(
}
fn part12(map: &[Vec<Tile>], path: &[IVec2], max_distance: i32) -> usize {
let combinations: Vec<(i32, i32)> = (1..=max_distance)
.flat_map(|i| (0..=(max_distance - i)).map(move |j| (i, j)))
.collect();
path.par_iter()
.map(|tile| {
Direction::all()
.iter()
.map(|direction| {
(1..=max_distance)
.map(|i| {
(0..=(max_distance - i))
.filter(|j| {
let new_tile_pos = tile
+ i * direction.to_vec()
+ j * direction.turn_right().to_vec();
combinations
.iter()
.filter(|(i, j)| {
let new_tile_pos =
tile + i * direction.to_vec() + j * direction.turn().to_vec();
map.get(new_tile_pos.x as usize)
.and_then(|l| l.get(new_tile_pos.y as usize))
.map_or(false, |t| {
!t.tiletype
&& t.distance
>= map[tile.x as usize][tile.y as usize]
.distance
t.distance
>= map[tile.x as usize][tile.y as usize].distance
+ 100
+ i as usize
+ *i as usize
+ *j as usize
&& !t.tiletype
})
})
.count()
})
.sum::<usize>()
})
.sum::<usize>()
})
.sum()
}