rust(day17): Part 1
This commit is contained in:
parent
c53633b1c1
commit
7b6e8f05e0
|
@ -0,0 +1,99 @@
|
|||
use std::time::{Duration, Instant};
|
||||
|
||||
const SIZE: usize = 50;
|
||||
const OFFSET: usize = SIZE / 2;
|
||||
|
||||
type Field = Vec<Vec<Vec<bool>>>;
|
||||
|
||||
pub fn step(field: &mut Field) {
|
||||
let mut changes = Vec::new();
|
||||
for (z, slice) in field.iter().enumerate() {
|
||||
for (y, row) in slice.iter().enumerate() {
|
||||
for (x, cell) in row.iter().enumerate() {
|
||||
let mut neighbors = 0;
|
||||
for dz in -1..=1 {
|
||||
for dy in -1..=1 {
|
||||
for dx in -1..=1 {
|
||||
let nx = dx + x as i64;
|
||||
let ny = dy + y as i64;
|
||||
let nz = dz + z as i64;
|
||||
|
||||
if (nx == x as i64 && ny == y as i64 && nz == z as i64)
|
||||
|| (nx < 0 || nx >= SIZE as i64)
|
||||
|| (ny < 0 || ny >= SIZE as i64)
|
||||
|| (nz < 0 || nz >= SIZE as i64)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
if field[nz as usize][ny as usize][nx as usize] {
|
||||
neighbors += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if *cell && neighbors != 2 && neighbors != 3 {
|
||||
changes.push((x, y, z, false));
|
||||
}
|
||||
if !cell && neighbors == 3 {
|
||||
changes.push((x, y, z, true));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (x, y, z, state) in changes {
|
||||
field[z][y][x] = state;
|
||||
}
|
||||
}
|
||||
|
||||
pub fn run(_: bool) -> Duration {
|
||||
let input = std::fs::read_to_string("../inputs/17").unwrap();
|
||||
|
||||
let instant = Instant::now();
|
||||
|
||||
let mut field = vec![vec![vec![false; SIZE]; SIZE]; SIZE];
|
||||
for (y, line) in input.lines().enumerate() {
|
||||
for (x, cell) in line.chars().enumerate() {
|
||||
field[OFFSET][y + OFFSET - 1][x + OFFSET - 1] = cell == '#';
|
||||
}
|
||||
}
|
||||
|
||||
// for y in 0..SIZE {
|
||||
// for x in 0..SIZE {
|
||||
// print!("{}", if field[OFFSET][y][x] { '#' } else { '.' });
|
||||
// }
|
||||
// println!();
|
||||
// }
|
||||
|
||||
for i in 0..6 {
|
||||
step(&mut field);
|
||||
|
||||
println!("step {}:", i + 1);
|
||||
// for z in (OFFSET - 1)..=(OFFSET + 1) {
|
||||
// println!("z = {}", z as i64 - OFFSET as i64);
|
||||
// for y in 0..SIZE {
|
||||
// for x in 0..SIZE {
|
||||
// print!("{}", if field[z][y][x] { '#' } else { '.' });
|
||||
// }
|
||||
// println!();
|
||||
// }
|
||||
// println!();
|
||||
// }
|
||||
}
|
||||
|
||||
let mut alive = 0;
|
||||
for slice in field {
|
||||
for row in slice {
|
||||
for cell in row {
|
||||
if cell {
|
||||
alive += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
dbg!(alive);
|
||||
|
||||
instant.elapsed()
|
||||
}
|
Loading…
Reference in New Issue