72 lines
1.8 KiB
Rust
72 lines
1.8 KiB
Rust
struct Move {
|
|
items: usize,
|
|
from: usize,
|
|
to: usize,
|
|
}
|
|
|
|
impl From<&str> for Move {
|
|
fn from(s: &str) -> Self {
|
|
let parts: Vec<&str> = s.split_ascii_whitespace().collect();
|
|
let items: usize = parts[1].parse().unwrap();
|
|
let from: usize = parts[3].parse().unwrap();
|
|
let to: usize = parts[5].parse().unwrap();
|
|
|
|
Move { items, from, to }
|
|
}
|
|
}
|
|
|
|
impl Move {
|
|
fn apply(&self, layout: &mut Vec<Vec<char>>) {
|
|
for _ in 0..self.items {
|
|
if let Some(item) = layout[self.from].pop() {
|
|
layout[self.to].push(item);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
fn get_initial_layout() -> Vec<Vec<char>> {
|
|
vec![
|
|
Vec::new(),
|
|
vec!['B', 'Q', 'C'],
|
|
vec!['R', 'Q', 'W', 'Z'],
|
|
vec!['B', 'M', 'R', 'L', 'V'],
|
|
vec!['C', 'Z', 'H', 'V', 'T', 'W'],
|
|
vec!['D', 'Z', 'H', 'B', 'N', 'V', 'G'],
|
|
vec!['H', 'N', 'P', 'C', 'J', 'F', 'V', 'Q'],
|
|
vec!['D', 'G', 'T', 'R', 'W', 'Z', 'S'],
|
|
vec!['C', 'G', 'M', 'N', 'B', 'W', 'Z', 'P'],
|
|
vec!['N', 'J', 'B', 'M', 'W', 'Q', 'F', 'P'],
|
|
]
|
|
}
|
|
|
|
fn get_position_string(layout: &Vec<Vec<char>>) -> String {
|
|
let mut s = String::new();
|
|
|
|
for i in 1..=9usize {
|
|
if let Some(ch) = layout[i].last() {
|
|
s.push(*ch);
|
|
}
|
|
}
|
|
|
|
s
|
|
}
|
|
|
|
fn main() {
|
|
let file_str = include_str!("input.txt");
|
|
let parts: Vec<&str> = file_str.split("\n\n").collect();
|
|
let moves = parts[1];
|
|
|
|
let mut layout = get_initial_layout();
|
|
|
|
moves.lines().for_each(|line| {
|
|
Move::from(line).apply(&mut layout);
|
|
});
|
|
|
|
let top_crates = get_position_string(&layout);
|
|
|
|
println!("Part 1: Top crates after moves: {}", top_crates);
|
|
}
|