day23: added
This commit is contained in:
parent
2b4ffe5fbe
commit
6828455692
119
src/day23/1.rs
119
src/day23/1.rs
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@ -1 +1,118 @@
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const INPUTS: [&'static str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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#![feature(test)]
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extern crate test;
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const INPUTS: [&str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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fn process(data: &str) -> i64 {
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let mut answer = 0;
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let grid: Vec<Vec<char>> = data.lines().map(|x| x.chars().collect()).collect();
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let m = grid.len();
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let n = grid[0].len();
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let mut stack = Vec::new();
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stack.push((0, 0, 1, BitSet::<156>::new()));
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while let Some((distance, sx, sy, mut visited)) = stack.pop() {
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if sx == m as i64 - 1 && sy == n as i64 - 2 {
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answer = std::cmp::max(answer, distance);
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continue;
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}
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if visited.get(sx * m as i64 + sy) {
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continue;
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}
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visited.set(sx * m as i64 + sy);
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let c = grid[sx as usize][sy as usize];
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let sticky = match c {
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'>' => Some([0, 1]),
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'<' => Some([0, -1]),
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'v' => Some([1, 0]),
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'^' => Some([-1, 0]),
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_ => None,
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};
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const DIRS: [[i64; 2]; 4] = [[0, 1], [1, 0], [0, -1], [-1, 0]];
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if let Some(d) = sticky {
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let mut x = sx;
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let mut y = sy;
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let mut dis = 0;
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loop {
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let p = x + d[0];
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let q = y + d[1];
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if p < 0
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|| q < 0
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|| p >= m as i64
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|| q >= n as i64
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|| grid[p as usize][q as usize] != '.'
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{
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break;
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}
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x = p;
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y = q;
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dis += 1;
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}
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stack.push((distance + dis, x, y, visited));
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} else {
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for dir in DIRS.iter() {
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let a = dir[0] + sx;
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let b = dir[1] + sy;
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if a < 0 || b < 0 || a >= m as i64 || b >= n as i64 {
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continue;
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}
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if unsafe { grid.get_unchecked(a as usize).get_unchecked(b as usize) == &'#' } {
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continue;
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}
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stack.push((distance + 1, a, b, visited.clone()));
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}
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}
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}
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answer
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}
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fn main() {
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for input in INPUTS.iter() {
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println!("answer = {}", process(input));
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}
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}
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#[derive(Ord, PartialEq, PartialOrd, Clone, Debug, Eq)]
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struct BitSet<const N: usize> {
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bits: [u128; N],
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}
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impl<const N: usize> BitSet<N> {
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const fn new() -> Self {
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Self { bits: [0; N] }
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}
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#[inline]
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fn set(&mut self, loc: i64) {
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let idx = loc / 128;
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let b_idx = loc & 127;
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self.bits[idx as usize] |= 1 << b_idx;
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}
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#[inline]
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const fn get(&self, loc: i64) -> bool {
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let idx = loc / 128;
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let b_idx = loc & 127;
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(self.bits[idx as usize] & (1 << b_idx)) > 0
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}
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}
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#[bench]
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fn part1(b: &mut test::Bencher) {
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b.iter(|| {
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let v = process(INPUTS[INPUTS.len() - 1]);
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test::black_box(v);
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});
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}
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const INPUTS: [&'static str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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#![feature(test)]
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extern crate test;
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const INPUTS: [&str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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fn process(data: &str) -> i64 {
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let mut answer = 0;
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let grid: Vec<Vec<char>> = data.lines().map(|x| x.chars().collect()).collect();
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let m = grid.len() as i64;
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let n = grid[0].len() as i64;
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let mut stack = Vec::new();
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stack.push((0, 0, 1, BitSet::<156>::new()));
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while let Some((distance, sx, sy, mut visited)) = stack.pop() {
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if sx == m - 1 && sy == n - 2 {
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answer = std::cmp::max(answer, distance);
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continue;
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}
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if unsafe { grid.get_unchecked(sx as usize).get_unchecked(sy as usize) == &'#' } {
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continue;
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}
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if visited.get(sx * m + sy) {
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continue;
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}
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visited.set(sx * m + sy);
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if sy + 1 < n {
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stack.push((distance + 1, sx, sy + 1, visited.clone()));
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}
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if sy > 0 {
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stack.push((distance + 1, sx, sy - 1, visited.clone()));
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}
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if sx + 1 < n {
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stack.push((distance + 1, sx + 1, sy, visited.clone()));
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}
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if sx > 0 {
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stack.push((distance + 1, sx - 1, sy, visited));
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}
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}
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answer
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}
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fn main() {
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for input in INPUTS.iter() {
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println!("answer = {}", process(input));
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}
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}
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#[derive(Ord, PartialEq, PartialOrd, Clone, Debug, Eq)]
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struct BitSet<const N: usize> {
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bits: [u128; N],
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}
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impl<const N: usize> BitSet<N> {
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const fn new() -> Self {
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Self { bits: [0; N] }
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}
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#[inline]
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fn set(&mut self, loc: i64) {
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let idx = loc / 128;
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let b_idx = loc & 127;
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self.bits[idx as usize] |= 1 << b_idx;
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}
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#[inline]
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const fn get(&self, loc: i64) -> bool {
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let idx = loc / 128;
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let b_idx = loc & 127;
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(self.bits[idx as usize] & (1 << b_idx)) > 0
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}
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}
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#[bench]
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fn part1(b: &mut test::Bencher) {
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b.iter(|| {
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let v = process(INPUTS[INPUTS.len() - 1]);
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test::black_box(v);
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});
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}
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141
src/day23/input.txt
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141
src/day23/input.txt
Normal file
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#.###########################################################################################################################################
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#.#.....#.....#.......#####...#...#...........#...###...#...#...#.....#.....#...#...#.....#.....###...#.....#...###...###...#...#...#...#####
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#.#.###.#.###.#.#####.#####.#.#.#.#.#########.#.#.###.#.#.#.#.#.#.###.#.###.#.#.#.#.#.###.#.###.###.#.#.###.#.#.###.#.###.#.#.#.#.#.#.#.#####
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#...#...#.#...#.....#...###.#.#.#.#...#.......#.#...#.#.#.#.#.#.#.#...#.#...#.#.#.#.#...#.#.#...#...#.#...#...#...#.#...#.#.#.#.#.#...#.....#
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#####.###.#.#######.###.###.#.#.#.###.#.#######.###.#.#.#.#.#.#.#.#.###.#.###.#.#.#.###.#.#.#.###.###.###.#######.#.###.#.#.#.#.#.#########.#
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#.....#...#...#...#...#.#...#.#.#.#...#.>.>.###.#...#.#.#.#...#.#.#.#...#.#...#.#.#...#.#.#.#.###...#.###...#.....#.#...#.#.#.#.#.#.........#
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#.#####.#####.#.#.###.#.#.###.#.#.#.#####v#.###.#.###.#.#.#####.#.#.#.###.#.###.#.###.#.#.#.#.#####.#.#####.#.#####.#.###.#.#.#.#.#.#########
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#.#...#...#...#.#.#...#.#...#...#...#.....#.....#...#.#.#.#.....#.#...#...#...#.#.#...#.#.#.#...#...#.###...#.#...#.#.#...#.#.#.#.#.#...#####
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#.#.#.###.#.###.#.#.###.###.#########.#############.#.#.#.#.#####.#####.#####.#.#.#.###.#.#.###.#.###.###.###.#.#.#.#.#.###.#.#.#.#.#.#.#####
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#.#.#.....#...#.#...###.....#.........###...........#.#.#.#.#...#.#.....#.....#.#.#.#...#.#...#.#...#.>.>.#...#.#.#.#.#...#.#.#.#.#...#.....#
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#.#.#########.#.#############.###########.###########.#.#.#.#.#.#.#.#####.#####.#.#.#.###.###.#.###.###v###.###.#.#.#.###.#.#.#.#.#########.#
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#.#.#.........#.............#.#.........#.......#...#.#.#.#.#.#...#.....#.....#.#.#.#...#.#...#.....#...###.#...#...#.#...#.#.#.#.#.........#
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#.#.#.#####################.#.#.#######.#######.#.#.#.#.#.#.#.#########.#####.#.#.#.###.#.#.#########.#####.#.#######.#.###.#.#.#.#.#########
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#...#...#...#...#.........#.#.#.#.......#.......#.#.#.#...#.#...#.......#...#.#.#.#.#...#.#.......###.#...#...#.......#...#...#.#.#...###...#
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#######.#.#.#.#.#.#######.#.#.#.#.#######.#######.#.#.#####.###.#.#######.#.#.#.#.#.#.###.#######.###.#.#.#####.#########.#####.#.###.###.#.#
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#...#...#.#.#.#.#.......#...#...#...#...#.....#...#.#.#.....#...#.#.....#.#.#.#...#.#...#...#...#...#...#.....#.....#...#...###...###.....#.#
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#.#.#.###.#.#.#v#######.###########.#.#.#####.#.###.#.#.#####.###.#.###.#.#.#.#####.###.###.#.#.###.#########.#####.#.#.###.###############.#
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#.#...#...#.#.#.>.......#.....#...#...#.....#.#.#...#.#...###...#.#.#...#.#.#...#...#...###...#.#...###.......###...#.#.#...#...............#
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#.#####.###.#.#v#########.###.#.#.#########.#.#.#.###.###.#####.#.#.#.###.#.###.#.###.#########.#.#####.#########.###.#.#.###.###############
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#.#.....###...#.........#...#...#.......#...#...#...#.###.>.>...#.#.#...#.#...#.#.>.>.#####.....#.....#.....#...#.....#...###.....#...#.....#
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#.#.###################.###.###########.#.#########.#.#####v#####.#.###.#.###.#.###v#######.#########.#####.#.#.#################.#.#.#.###.#
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#...#...#...#.....#...#.###...#.......#.#.......###...#...#.....#...###.#.#...#...#...###...#.....#...#.....#.#.#...#...#...#####...#...#...#
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#####.#.#.#.#.###.#.#.#.#####.#.#####.#.#######.#######.#.#####.#######.#.#.#####.###.###.###.###.#.###.#####.#.#.#.#.#.#.#.#############.###
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#...#.#...#...###...#...#.....#.#.....#.........#...#...#.....#.......#...#...#...###...#.....###...#...#...#.#...#...#...#.#.............###
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#.#.#.###################.#####.#.###############.#.#.#######.#######.#######.#.#######.#############.###.#.#.#############.#.###############
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#.#.#.............#...###.......#.....#.....#...#.#.#.....#...#.......###.....#...#...#.......#.....#...#.#...###...#.......#...............#
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#.#.#############.#.#.###############.#.###.#.#.#.#.#####.#.###.#########.#######.#.#.#######.#.###.###.#.#######.#.#.#####################.#
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#.#.#.............#.#...#.....#.......#.#...#.#.#.#.#.....#.###.........#.....#...#.#.#.......#...#.###...#.......#...#####...............#.#
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#.#.#.#############.###.#.###.#.#######.#.###.#.#.#.#.#####.###########.#####.#.###.#.#.#########.#.#######.###############.#############.#.#
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#.#.#...........###.#...#...#.#.......#.#.###.#.#.#.#...#...#...#.......#...#...#...#...###.......#.#.....#...............#.#...........#...#
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#.#.###########.###.#.#####.#.#######.#.#.###.#.#.#.###.#.###.#.#v#######.#.#####.#########.#######.#.###.###############.#.#.#########.#####
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#.#.............#...#...#...#...#.....#.#...#.#.#.#.#...#...#.#.>.>.#...#.#.....#...........#...#...#.#...#...#.......#...#...#.........#...#
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#.###############.#####.#.#####.#.#####.###.#.#.#.#.#.#####.#.###v#.#.#.#.#####.#############.#.#.###.#.###.#.#.#####.#.#######.#########.#.#
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#...#.....#...###...#...#.#.....#...###...#...#...#.#.....#.#.#...#.#.#.#...#...#...###.......#...###.#...#.#.#.....#.#.#...###...........#.#
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###.#.###v#.#.#####.#.###.#.#######v#####.#########.#####.#.#.#.###.#.#.###.#.###.#.###v#############.###.#.#.#####.#.#.#.#.###############.#
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###...###.>.#.#...#.#.#...#.#...#.>.>...#...#.......#...#.#...#...#.#.#.#...#.#...#...>.>.....###...#.#...#.#.###...#...#.#.#...#...........#
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#########v###.#.#.#.#.#.###.#.#.#.#v###.###.#.#######.#.#.#######.#.#.#.#.###.#.#######v#####.###.#.#.#.###.#.###v#######.#.#.#.#.###########
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#####...#...#.#.#.#.#.#...#.#.#.#.#...#.....#.#.....#.#.#.#.....#.#...#.#.#...#.###...#.....#...#.#.#.#.....#...>.>.###...#.#.#.#.........###
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#####.#.###.#.#.#.#.#.###.#.#.#.#.###.#######.#.###.#.#.#.#.###.#.#####.#.#.###.###.#.#####.###.#.#.#.###########v#.###.###.#.#.#########.###
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#.....#.....#.#.#.#.#...#.#.#.#...###...#...#...###...#...#...#.#.....#.#.#...#.#...#.#.....###.#.#...#...........#...#.#...#.#.#...#...#...#
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#.###########.#.#.#.###.#.#.#.#########.#.#.#################.#.#####.#.#.###.#.#.###.#.#######.#.#####.#############.#.#.###.#.#.#.#v#.###.#
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#...........#.#.#...###.#.#...###...###...#.......###...###...#.#...#.#...###...#...#.#.....###...#...#...#.......#...#.#.#...#...#.>.#.#...#
|
||||
###########.#.#.#######.#.#######.#.#############.###.#.###.###.#.#.#.#############.#.#####.#######.#.###.#.#####.#.###.#.#.#########v#.#.###
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#...........#...#.......#...#.....#...............#...#.....#...#.#.#...###...#...#.#.#.....#...#...#.#...#.#.....#.#...#...###.....#.#...###
|
||||
#.###############.#########.#.#####################.#########.###.#.###.###.#.#.#.#.#.#.#####.#.#.###.#.###.#.#####.#.#########.###.#.#######
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||||
#...............#...#...#...#...#.................#.#.....###.....#...#.#...#...#...#...#.....#.#.#...#.....#.....#...###...#...#...#.......#
|
||||
###############.###.#.#.#.#####.#.###############.#.#.###.###########.#.#.###############.#####.#.#.#############.#######.#.#.###.#########.#
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#.......#.......###...#.#...###...#...............#...###.....#.....#.#.#...............#.#...#...#...###...#...#.#...#...#...###.....#...#.#
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#.#####.#.#############.###.#######.#########################.#.###.#.#.###############.#.#.#.#######.###.#.#.#.#.#.#.#.#############.#.#.#.#
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#.#...#...#...#####...#.....#.......#.....#...###...#.........#.#...#...#...###.........#...#...#...#.#...#...#...#.#.#...........#...#.#.#.#
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#.#.#.#####.#.#####.#.#######.#######.###.#.#.###.#.#.#########.#.#######.#.###.###############.#.#.#.#.###########.#.###########.#.###.#.#.#
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#...#.#...#.#...#...#.###...#.........#...#.#.#...#.#.......#...#...#...#.#...#.........#.....#.#.#...#.......###...#.#...........#.....#...#
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||||
#####.#.#v#.###.#.###.###.#.###########.###.#.#.###.#######.#.#####.#.#.#.###.#########.#.###.#.#.###########v###.###.#.#####################
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#...#...#.>.#...#.#...#...#.#...........#...#...#...#...#...#.#.....#.#.#.#...###.......#...#...#...#.....#.>.>...#...#...............###...#
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||||
#.#.#####v###.###.#.###.###.#.###########.#######.###.#.#.###.#.#####.#.#.#.#####.#########.#######.#.###.#.#v#####.#################.###.#.#
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#.#.....#...#.....#...#...#.#.............#.......###.#...#...#.#...#.#.#.#.#...#...#.....#...#.....#...#.#.#...#...###.......#.....#...#.#.#
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#.#####.###.#########.###.#.###############.#########.#####.###.#.#.#.#.#.#.#.#.###v#.###.###.#.#######.#.#.###.#.#####.#####.#.###.###.#.#.#
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||||
#.#...#.#...###.......#...#.#...#...#.....#.#...#...#.....#...#.#.#.#.#.#.#...#...>.>.###.#...#.....#...#...###.#.....#.....#.#...#.....#.#.#
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#.#.#.#.#.#####.#######.###.#.#.#.#.#.###.#.#.#.#.#.#####.###.#.#.#.#.#.#.#########v#####.#.#######.#.#########.#####.#####.#.###.#######.#.#
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#...#.#...###...###...#...#.#.#.#.#.#...#.#.#.#.#.#.#...#.#...#...#.#.#...###.......#...#.#.###.....#...#.......#.....#...#.#.....###...#.#.#
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#####.#######.#####.#.###.#.#.#.#.#.###.#.#v#.#.#.#.#.#.#v#.#######.#.#######.#######.#.#.#.###.#######.#.#######.#####.#.#v#########.#.#.#.#
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#...#.......#.#...#.#.#...#.#.#.#.#...#.#.>.>.#.#.#.#.#.>.>.#...###...#.....#.....###.#.#.#...#.#...#...#.......#.......#.>.#.....#...#...#.#
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#.#.#######.#.#.#.#.#.#.###.#.#.#.###.#.###v###.#.#.#.###v###.#.#######.###.#####.###.#.#.###.#.#.#.#.#########.###########v#.###.#.#######.#
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#.#.........#...#...#.#.###.#.#.#.###...#...###.#.#.#...#...#.#.......#...#.#...#.....#.#.....#.#.#.#...#.......###.........#...#.#.#.......#
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#.###################.#.###.#.#.#.#######.#####.#.#.###.###.#.#######.###.#.#.#.#######.#######.#.#.###.#.#########.###########.#.#.#.#######
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#...............###...#...#.#.#.#.#.....#...#...#.#.#...#...#.#.....#...#.#...#.........#...###...#.#...#.........#.........#...#.#.#.......#
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###############.###.#####.#.#.#.#.#.###.###.#.###.#.#.###.###.#.###.###.#.###############.#.#######.#.###########.#########.#.###.#.#######.#
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#.....#.........#...#...#.#.#.#...#...#.....#.#...#...###...#.#...#.#...#.#...............#.....#...#.#...........#...#.....#.###...#...#...#
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#.###.#.#########.###.#.#.#.#.#######.#######.#.###########.#.###.#.#.###.#.###################.#.###.#.###########.#.#.#####.#######.#.#.###
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#...#.#...#...###.....#...#...#...###.......#.#...#...#####...#...#...#...#.#...........#...#...#.#...#...#.........#.#...#...#.......#...###
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###.#.###.#.#.#################.#.#########.#.###.#.#.#########.#######.###.#.#########.#.#.#.###.#.#####.#.#########.###.#.###.#############
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#...#.....#.#.....#...#...#...#.#.#...#...#.#.#...#.#...#.......#...###.....#.........#...#...###...###...#.#.....#...#...#...#.#.....###...#
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#.#########.#####.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.###.###.#.#######.#.#################.#################.###.#.###.#.###.#####.#.#.###.###.#.#
|
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|
||||
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|
||||
###########################################################################################################################################.#
|
23
src/day23/sample.txt
Normal file
23
src/day23/sample.txt
Normal file
|
@ -0,0 +1,23 @@
|
|||
#.#####################
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||||
#.......#########...###
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||||
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|
||||
#####################.#
|
Loading…
Reference in New Issue
Block a user