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pub mod direction {
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Direction {
Up,
Right,
Down,
Left,
}
use Direction::*;
impl Direction {
pub fn iter_all() -> impl Iterator<Item = Self> {
[Up, Right, Down, Left].into_iter()
}
pub fn to_offset(&self) -> (isize, isize) {
match self {
Up => (-1, 0),
Right => (0, 1),
Down => (1, 0),
Left => (0, -1),
}
}
pub fn rotate(&self) -> Self {
match self {
Up => Right,
Right => Down,
Down => Left,
Left => Up,
}
}
pub fn around(&self) -> impl Iterator<Item = Self> + use<'_> {
Self::iter_all().filter(|&x| x != self.opposite())
}
pub fn opposite(&self) -> Self {
match self {
Up => Down,
Right => Left,
Down => Up,
Left => Right,
}
}
}
}
pub mod matrix {
pub type Pos = (usize, usize);
pub type PosDelta = (isize, isize);
#[derive(Clone)]
pub struct Matrix<T> {
dots: Vec<Vec<T>>,
pub limit: Pos,
}
impl<T> Matrix<T> {
pub fn new<F>(text: &str, parse: F) -> Self
where
F: Fn(char) -> T,
{
let dots: Vec<Vec<T>> = text
.lines()
.map(|row| row.chars().map(&parse).collect())
.collect();
let limit = (dots.len(), dots[0].len());
Self { dots, limit }
}
pub fn get(&self, (x, y): Pos) -> &T {
&self.dots[x][y]
}
pub fn set(&mut self, (x, y): Pos, dot: T) {
self.dots[x][y] = dot;
}
pub fn in_bounds(&self, (x, y): PosDelta) -> Option<Pos> {
if x >= 0 && y >= 0 && x < self.limit.0 as isize && y < self.limit.1 as isize {
Some((x as usize, y as usize))
} else {
None
}
}
// todo use in_bounds
pub fn pos_move(&self, (x, y): Pos, (dx, dy): PosDelta) -> Option<Pos> {
let x2 = x as isize + dx;
if x2 < 0 || x2 >= self.limit.0 as isize {
return None;
}
let y2 = y as isize + dy;
if y2 < 0 || y2 >= self.limit.1 as isize {
return None;
}
Some((x2 as usize, y2 as usize))
}
}
use std::fmt;
impl<T> fmt::Display for Matrix<T>
where
T: fmt::Display,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for row in &self.dots {
writeln!(
f,
"{}",
row.iter().map(|c| c.to_string()).collect::<String>()
)?;
}
fmt::Result::Ok(())
}
}
}
pub fn read_input(day: &str) -> String {
let input_file = format!("inputs/{day}");
std::fs::read_to_string(input_file).unwrap()
}
pub fn run_day<S1, S2>(day: &str, p1: S1, p2: S2) -> (String, String)
where
S1: FnOnce(&str) -> String,
S2: FnOnce(&str) -> String,
{
let input = read_input(day);
let p1r = p1(&input);
let p2r = p2(&input);
println!("==== DAY {day}");
println!("Result (P1): {}", p1r);
println!("Result (P2): {}", p2r);
(p1r, p2r)
}
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