ap29600

use itertools::Itertools;
use std::collections::HashSet;

const N6:  [(i64, i64, i64); 6] = [
    ( 1, 0, 0), (0,  1, 0), (0, 0,  1),
    (-1, 0, 0), (0, -1, 0), (0, 0, -1)
];
const N14: [(i64, i64, i64); 18]= [
    ( 1,  0,  0), (0,  1,  0), ( 0,  0,  1),
    (-1,  0,  0), (0, -1,  0), ( 0,  0, -1),

ap29600

use std::ops::{Index, IndexMut};
use itertools::Itertools;

struct Bitmap {
    rows: usize,
    cols: usize,
    backing: Vec<bool>,
    boundary: bool,
}

ap29600

package aoc12

import "core:fmt"
import "core:slice"
import "core:strings"

when ODIN_DEBUG {
  input :: `start-A
start-b
A-c

ap29600

x = sum(load("in.txt")(:) == [0:8])';

A = diag(ones(1, 8), 1);
A(9, 1) = 1;
A(7, 1) = 1;

format rat

sum(A^80*x)
sum(A^256*x)