Wes Holland
1 year ago
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823053c628
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/target
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "day10"
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version = "0.1.0"
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[package]
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name = "day10"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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7-F7-
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|
||||
|-F-F-J7-7JFJ-|FFJ||L7|||L7L-J.|L---7LJ|L-JL7||F-J||FJFJL7L-7L-7L7F7F------JL-7LJ|||||FJ-L7F-7|FJ||LJFJL--7L7L7||F|L-7-L..L|.LJL-7F|LL-FL7.|
|
||||
|-L7||--FJJJ.|L-L-J|FJ||L-JF7F7|F7F-JLFJF-7FJFJL--J|L7L-7L7FJF-JFJ|LJF----7F-7L-7LJ|||L-7FJL7LJL7L--7L7F-7L7L7|||FJF-J7L|-F-J.||FJ-7-.F|7|-7
|
||||
-77L-|-LJJ.|LJJLFJJLJ.LJ-LFJLJLJ|LJLF-JFJ||L7|F7F--JFJF7L7|L7L7FJJ|F7|F---J|7L-7L7FJ||F7|L7FJF--JF7FJ7LJ.L7|-LJ||L7L--7-.F7|JF7LF7F|F7-J-|.|
|
||||
L77JLJ77.F--7|JF--FLJ7L7F.L7F7F7L--7L-7|F-JFJLJ|L--7L7||FJ|FJFJL-7LJLJL-7F7L--7|FJ|FJLJLJFJL7L-7FJ|L--7L|-||LF-JL7|F-7|JF|L|J||FF--JFLJ|.F-L
|
||||
LLJJJ|L7-7FJ7|-|7F7J|J7FF--J|LJ|F--JF7||L7FJ7F-JF7FJFJ||L7|L7|F7FJF-----J||F7FJLJFJ|F----JF7L-7LJFJF7FJ.LLLJ-L7F7|||LLJ--F-|L|7J.7|F|J.77JL7
|
||||
||JF-7FJ|L.L-J.|F|.|LJ|-|F--JF7|L-7FJLJ|FJL-7|F7|LJ-L7||FJL-JLJ||-L----7FJ|||L--7L7|L7F7F7||F7L7-|FJLJ--77L|J|||||||.LL7L|-|.F--7.LF7J.-77J|
|
||||
FL7L.LL||L-JF|-J7|F-7.--LJJF-JLJF7||F-7|L7F-J|||L--7FLJ|L7JJ.J|LJJLF---J|FJ|L7F7L7LJJLJ||||||L-JJLJ-JJ|LJ7|L-LLJLJ||JLJ-JL|F7J-7.J-L7.FL.L77
|
||||
7F7JL77|JL|-FFFJ|F77|F|.|J-|F-7FJ||||FLJFJL-7||L7F7L--7|FJJ|77F|7.|L---7|L7L7||L7L----7||||LJLJ|LFJ|7L-7L--J.LJLFLLJJFL.F7FLJ.F|F|7L||J|--|J
|
||||
-|L|LLL77FF-|FJJJ|JF7--7L|FLJ.|L7||||F--JF-7|LJFJ|L7F-J|L7F|FJ777.JJLF-J|FJFJLJ.|F7F-7|LJ||7J7-J.|.FJ.L--FJ7JLJL7JFJJF-7L-|L--LL-L7.FJL-JL||
|
||||
FL7F--7L|-JF--L-FFJFJL--7LF---JFJLJLJL--7L7|L7.L7|FJ||.L-J7|FL-J7.L|-|F7|L7L--7FJ|LJFLJJFLJJ---F-J-|.FLL-7-J7-.7J.JF-J-L77JF..FJ7|F7|F7.FFL|
|
||||
JL7JF-JL||L-LJL77J-L7JF|-FL7F--J|..|.F--JFJL-JFFJ|L7L77.LJLJJ7|L|J.-J||||FJF-7||FJJF77.L-|.|.L-JJ7-LF7.|.-J7F-----J-LFFJL-FLJ-J.--7-F-|JJJLL
|
||||
.FJ-JF|7F7|.F-7LLJ.L||||.|FLJJJ|J-|LFL--7L-7-|-L7|FJFJ77JF|-FL7JLF77.||LJ|FJFJ||||FJ|77|L|7F7L|L|7..||7|FL.FF7L.|LL7LJ--7.|LJ77LJ|J-LFJ|F|.L
|
||||
LLJJ.F7-J|-FJ.L7L-F-.|J7.||F|7-||.|F----JF7L---7||L7|JLLF77L7L|JF|.77LJJ-LJ.|FJ|L-JFJL|7-FFL--L-FF-7-|-F77L-|7J-|..|7|J||F-7LJ7LL7J|.|.FJF||
|
||||
||77FJ|F7.L7|FL||FJ77|J|---7|--J-7-L-7F-7|L--7FJLJFLJ.F.LFL-..-FFJLJJ|L.FJJ-LJFJF7FJJ7L|LJ7J7.|-LJ7.FLLJ-7L7L7.FJ-FJF7||.7--7J7L----|77|-LJ|
|
||||
-|-|--F7|7..|J-L|-LJ7FFJF..L|--|-J7|7LJ-|L--7LJ.|7--|-|7L|FJ-7L7L7F|FJ--L-JJLLL7|LJ7|JJJF-JLL7FF7-7-JFJ|7LF|.|.L--F-J-J-FJF7|LJ-JJLL-JFJ|FFF
|
||||
LL.|||.F|L77.L-JL|L|7-|JL--.L-7L-L|JFF--JF-7L--7JJ.FF.|||.|7LL.-7|J7|FF.|J.7LL-LJ-L-F7|FL-||FLFJ7-|J.J7L--|7FJ777.F-7|---7LL7||FLJFJ|-7-|--J
|
||||
LJ-JJL-FLJ|J-JL7.7LLJ-F..-.-J.7LLL7-JL---J-L---JJ.F.F7.LJ.LJLJ.J-J.|.JL7-.J.JJFL|J.|JF-J-L|-LJF-F--FJJLLJLJJ-L|JLLJL7--J.J..|-F7JL--L-J.|JFJ
|
||||
@ -0,0 +1,102 @@
|
||||
use std::fmt;
|
||||
|
||||
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
|
||||
pub enum Tile {
|
||||
NorthEast,
|
||||
NorthSouth,
|
||||
NorthWest,
|
||||
EastWest,
|
||||
SouthWest,
|
||||
SouthEast,
|
||||
Ground,
|
||||
Start,
|
||||
}
|
||||
/*
|
||||
| is a vertical pipe connecting north and south.
|
||||
- is a horizontal pipe connecting east and west.
|
||||
L is a 90-degree bend connecting north and east.
|
||||
J is a 90-degree bend connecting north and west.
|
||||
7 is a 90-degree bend connecting south and west.
|
||||
F is a 90-degree bend connecting south and east.
|
||||
. is ground; there is no pipe in this tile.
|
||||
S is the starting position of the animal; there is a pipe on this tile, but your sketch doesn't show what shape the pipe has.
|
||||
*/
|
||||
impl Tile {
|
||||
pub fn from_char(c: char) -> Self {
|
||||
match c {
|
||||
'|' => Tile::NorthSouth,
|
||||
'-' => Tile::EastWest,
|
||||
'L' => Tile::NorthEast,
|
||||
'J' => Tile::NorthWest,
|
||||
'7' => Tile::SouthWest,
|
||||
'F' => Tile::SouthEast,
|
||||
'.' => Tile::Ground,
|
||||
'S' => Tile::Start,
|
||||
_ => panic!("Bad Input")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Display for Tile {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let c = match self {
|
||||
Tile::NorthSouth => '|',
|
||||
Tile::EastWest => '-',
|
||||
Tile::NorthEast => 'L',
|
||||
Tile::NorthWest => 'J',
|
||||
Tile::SouthWest => '7',
|
||||
Tile::SouthEast => 'F',
|
||||
Tile::Ground => '.',
|
||||
Tile::Start => 'S',
|
||||
};
|
||||
write!(f, "{}", c)
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
|
||||
pub struct Pos {
|
||||
pub x: usize,
|
||||
pub y: usize,
|
||||
}
|
||||
|
||||
pub fn neighbors(p: Pos, t: Tile) -> (Pos, Pos) {
|
||||
match t {
|
||||
Tile::NorthEast => (Pos { x: p.x, y: p.y - 1}, Pos { x: p.x + 1, y: p.y }),
|
||||
Tile::NorthSouth => (Pos { x: p.x, y: p.y - 1}, Pos { x: p.x, y: p.y + 1 }),
|
||||
Tile::NorthWest => (Pos { x: p.x, y: p.y - 1}, Pos { x: p.x - 1, y: p.y }),
|
||||
Tile::EastWest => (Pos { x: p.x - 1, y: p.y}, Pos { x: p.x + 1, y: p.y }),
|
||||
Tile::SouthWest => (Pos { x: p.x , y: p.y + 1}, Pos { x: p.x - 1, y: p.y }),
|
||||
Tile::SouthEast => (Pos { x: p.x + 1, y: p.y}, Pos { x: p.x, y: p.y + 1 }),
|
||||
Tile::Ground => (p, p),
|
||||
Tile::Start => (p, p),
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
pub fn next_tile(prev: Pos, current: Pos, tile: Tile) -> Pos {
|
||||
let (a, b) = neighbors(current, tile);
|
||||
if a == prev {
|
||||
b
|
||||
}
|
||||
else {
|
||||
a
|
||||
}
|
||||
}
|
||||
|
||||
pub fn extrapolate_tile(n: Tile, e: Tile, s: Tile, w: Tile) -> Tile {
|
||||
let conn_n = match n { Tile::NorthSouth | Tile::SouthWest | Tile::SouthEast => true, _ => false };
|
||||
let conn_e = match e { Tile::EastWest | Tile::SouthWest | Tile::NorthWest => true, _ => false };
|
||||
let conn_s = match s { Tile::NorthSouth | Tile::NorthEast | Tile::NorthWest => true, _ => false };
|
||||
let conn_w = match w { Tile::EastWest | Tile::NorthEast | Tile::SouthEast => true, _ => false };
|
||||
match (conn_n, conn_e, conn_s, conn_w) {
|
||||
(true, true, false, false) => Tile::NorthEast,
|
||||
(true, false, true, false) => Tile::NorthSouth,
|
||||
(true, false, false, true) => Tile::NorthWest,
|
||||
(false, true, true, false) => Tile::SouthEast,
|
||||
(false, true, false, true) => Tile::EastWest,
|
||||
(false, false, true, true) => Tile::SouthWest,
|
||||
_ => panic!("Invalid connections")
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -0,0 +1,59 @@
|
||||
use std::io::{Lines, StdinLock};
|
||||
|
||||
/// A simple, but panic-y reader for stdin
|
||||
pub fn simple_stdin() -> SimpleStdinLines {
|
||||
SimpleStdinLines::new()
|
||||
}
|
||||
|
||||
pub struct SimpleStdinLines {
|
||||
pub inner: Lines<StdinLock<'static>>,
|
||||
}
|
||||
|
||||
impl SimpleStdinLines {
|
||||
pub fn new() -> Self {
|
||||
Self { inner: std::io::stdin().lines() }
|
||||
}
|
||||
}
|
||||
|
||||
impl Iterator for SimpleStdinLines {
|
||||
type Item = String;
|
||||
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
self.inner.next().transpose().unwrap()
|
||||
}
|
||||
}
|
||||
|
||||
/// A simple, but panic-y parser of arguments
|
||||
pub fn simple_args() -> SimpleArgs {
|
||||
SimpleArgs::init()
|
||||
}
|
||||
|
||||
|
||||
pub struct SimpleArgs {
|
||||
args: Vec<String>,
|
||||
}
|
||||
|
||||
impl SimpleArgs {
|
||||
pub fn init() -> Self {
|
||||
Self { args: std::env::args().collect() }
|
||||
}
|
||||
|
||||
pub fn get_flag(&self, name: &str) -> bool {
|
||||
self.args.iter().any(|x| x == name)
|
||||
}
|
||||
|
||||
pub fn get_value(&self, name: &str, default: &str) -> String {
|
||||
let pos = self.args.iter().position(|x| x == name);
|
||||
if let Some(idx) = pos {
|
||||
if let Some(s) = self.args.iter().nth(idx + 1) {
|
||||
s.clone()
|
||||
}
|
||||
else {
|
||||
String::from(default)
|
||||
}
|
||||
}
|
||||
else {
|
||||
String::from(default)
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,22 @@
|
||||
mod common;
|
||||
mod input_tools;
|
||||
mod part1;
|
||||
mod part2;
|
||||
|
||||
use input_tools::*;
|
||||
use part1::puzzle1;
|
||||
use part2::puzzle2;
|
||||
|
||||
|
||||
fn main() {
|
||||
let args = simple_args();
|
||||
let verbose = args.get_flag("-v");
|
||||
let part = args.get_value("-p", "1");
|
||||
|
||||
match part.as_str() {
|
||||
"1" => puzzle1(verbose),
|
||||
"2" => puzzle2(verbose),
|
||||
_ => println!("Nothing to do")
|
||||
}
|
||||
}
|
||||
|
||||
@ -0,0 +1,59 @@
|
||||
use crate::common::*;
|
||||
use crate::input_tools::*;
|
||||
|
||||
pub fn puzzle1(verbose: bool) {
|
||||
println!("Part 1");
|
||||
let input = simple_stdin();
|
||||
|
||||
let mut ground_map: Vec<[Tile; 140]> = vec![];
|
||||
let mut start_x = 0;
|
||||
let mut start_y = 0;
|
||||
|
||||
for (y, line) in input.enumerate() {
|
||||
let mut tiles = [Tile::Ground; 140];
|
||||
for (x, c) in line.chars().enumerate() {
|
||||
let t = Tile::from_char(c);
|
||||
tiles[x] = t;
|
||||
|
||||
if t == Tile::Start {
|
||||
start_x = x;
|
||||
start_y = y;
|
||||
}
|
||||
}
|
||||
|
||||
if verbose {
|
||||
for x in 0..20 {
|
||||
print!("{} ", tiles[x]);
|
||||
}
|
||||
println!("");
|
||||
}
|
||||
ground_map.push(tiles);
|
||||
}
|
||||
|
||||
let n = if start_y > 0 { ground_map[start_y-1][start_x] } else { Tile::Ground };
|
||||
let e = if start_x < ground_map[0].len() { ground_map[start_y][start_x+1] } else { Tile::Ground };
|
||||
let s = if start_y < ground_map.len() { ground_map[start_y+1][start_x] } else { Tile::Ground };
|
||||
let w = if start_x > 0 { ground_map[start_y][start_x-1] } else { Tile::Ground };
|
||||
|
||||
let start_tile = extrapolate_tile(n, e, s, w);
|
||||
if verbose {
|
||||
println!("Starting at ({}, {}) -> {:?}", start_x, start_y, start_tile);
|
||||
}
|
||||
|
||||
let mut path = 1;
|
||||
let start = Pos { x: start_x, y: start_y };
|
||||
let (mut current, _) = neighbors(start, start_tile);
|
||||
let mut prev = start;
|
||||
|
||||
while current != start {
|
||||
let tile = ground_map[current.y][current.x];
|
||||
let next = next_tile(prev, current, tile);
|
||||
prev = current;
|
||||
current = next;
|
||||
path += 1;
|
||||
}
|
||||
|
||||
println!("Path length = {}", path);
|
||||
println!("Target Point = {}", path / 2);
|
||||
}
|
||||
|
||||
@ -0,0 +1,175 @@
|
||||
use crate::input_tools::*;
|
||||
use crate::common::*;
|
||||
use std::fmt;
|
||||
|
||||
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
|
||||
pub enum Edge {
|
||||
None,
|
||||
Vert,
|
||||
NorthEast,
|
||||
NorthWest,
|
||||
SouthEast,
|
||||
SouthWest,
|
||||
Horiz,
|
||||
}
|
||||
|
||||
impl fmt::Display for Edge {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
let c = match self {
|
||||
Edge::None => '.',
|
||||
Edge::Vert => '|',
|
||||
Edge::Horiz => '-',
|
||||
Edge::NorthEast => 'L',
|
||||
Edge::NorthWest => 'J',
|
||||
Edge::SouthEast => 'F',
|
||||
Edge::SouthWest => '7',
|
||||
};
|
||||
write!(f, "{}", c)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
pub fn puzzle2(verbose: bool) {
|
||||
println!("Part 2");
|
||||
let input = simple_stdin();
|
||||
|
||||
let mut ground_map: Vec<[Tile; 140]> = vec![];
|
||||
let mut edge_map: Vec<[bool; 140]> = vec![];
|
||||
let mut start_x = 0;
|
||||
let mut start_y = 0;
|
||||
|
||||
for (y, line) in input.enumerate() {
|
||||
let mut tiles = [Tile::Ground; 140];
|
||||
let edges = [false; 140];
|
||||
for (x, c) in line.chars().enumerate() {
|
||||
let t = Tile::from_char(c);
|
||||
tiles[x] = t;
|
||||
|
||||
if t == Tile::Start {
|
||||
start_x = x;
|
||||
start_y = y;
|
||||
}
|
||||
}
|
||||
|
||||
if verbose {
|
||||
for x in 0..20 {
|
||||
print!("{} ", tiles[x]);
|
||||
}
|
||||
println!("");
|
||||
}
|
||||
ground_map.push(tiles);
|
||||
edge_map.push(edges);
|
||||
}
|
||||
|
||||
let n = if start_y > 0 { ground_map[start_y-1][start_x] } else { Tile::Ground };
|
||||
let e = if start_x < ground_map[0].len() { ground_map[start_y][start_x+1] } else { Tile::Ground };
|
||||
let s = if start_y < ground_map.len() { ground_map[start_y+1][start_x] } else { Tile::Ground };
|
||||
let w = if start_x > 0 { ground_map[start_y][start_x-1] } else { Tile::Ground };
|
||||
|
||||
let start_tile = extrapolate_tile(n, e, s, w);
|
||||
if verbose {
|
||||
println!("Starting at ({}, {}) -> {:?}", start_x, start_y, start_tile);
|
||||
}
|
||||
|
||||
let start = Pos { x: start_x, y: start_y };
|
||||
ground_map[start_y][start_x] = start_tile;
|
||||
let (mut current, _) = neighbors(start, start_tile);
|
||||
let mut prev = start;
|
||||
|
||||
// Paint Edges
|
||||
while current != start {
|
||||
let tile = ground_map[current.y][current.x];
|
||||
let next = next_tile(prev, current, tile);
|
||||
|
||||
edge_map[current.y][current.x] = match tile {
|
||||
Tile::Ground | Tile::Start => panic!("Bad Map"),
|
||||
_ => true,
|
||||
};
|
||||
|
||||
prev = current;
|
||||
current = next;
|
||||
}
|
||||
|
||||
// Scanlines
|
||||
let mut count = 0;
|
||||
let mut edge_stack: Vec<Tile> = vec![];
|
||||
for (y,l) in edge_map.into_iter().enumerate() {
|
||||
for (x,is_edge) in l.into_iter().enumerate() {
|
||||
let current = ground_map[y][x];
|
||||
let last = edge_stack.last();
|
||||
|
||||
|
||||
if is_edge {
|
||||
if verbose {
|
||||
print!("{}", current);
|
||||
}
|
||||
|
||||
if let Some(e) = last {
|
||||
match (e, current) {
|
||||
(Tile::NorthEast, Tile::NorthWest) => { edge_stack.pop(); },
|
||||
(Tile::NorthEast, Tile::EastWest) => {},
|
||||
(Tile::NorthEast, Tile::SouthWest) => {
|
||||
edge_stack.pop();
|
||||
if let Some(e_prev) = edge_stack.last() {
|
||||
assert!(*e_prev == Tile::NorthSouth);
|
||||
edge_stack.pop();
|
||||
}
|
||||
else {
|
||||
edge_stack.push(Tile::NorthSouth);
|
||||
}
|
||||
}
|
||||
(Tile::NorthSouth, Tile::NorthEast) => { edge_stack.push(Tile::NorthEast); },
|
||||
(Tile::NorthSouth, Tile::NorthSouth) => { edge_stack.pop(); },
|
||||
(Tile::NorthSouth, Tile::SouthEast) => { edge_stack.push(Tile::SouthEast); },
|
||||
(Tile::SouthEast, Tile::NorthWest) => {
|
||||
edge_stack.pop();
|
||||
if let Some(e_prev) = edge_stack.last() {
|
||||
assert!(*e_prev == Tile::NorthSouth);
|
||||
edge_stack.pop();
|
||||
}
|
||||
else {
|
||||
edge_stack.push(Tile::NorthSouth);
|
||||
}
|
||||
},
|
||||
(Tile::SouthEast, Tile::EastWest) => {},
|
||||
(Tile::SouthEast, Tile::SouthWest) => { edge_stack.pop(); },
|
||||
(_, _) => panic!("Bad"),
|
||||
}
|
||||
}
|
||||
else {
|
||||
match current {
|
||||
Tile::NorthEast => edge_stack.push(Tile::NorthEast),
|
||||
Tile::NorthSouth => edge_stack.push(Tile::NorthEast),
|
||||
Tile::SouthEast => edge_stack.push(Tile::SouthEast),
|
||||
_ => panic!("Bad"),
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
|
||||
match last {
|
||||
Some(Tile::NorthSouth) => {
|
||||
count += 1;
|
||||
|
||||
if verbose {
|
||||
print!("I");
|
||||
}
|
||||
}
|
||||
_ => {
|
||||
if verbose {
|
||||
print!(".");
|
||||
}
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
if verbose {
|
||||
println!("");
|
||||
}
|
||||
}
|
||||
|
||||
println!("Internal count {}", count);
|
||||
}
|
||||
|
||||
Loading…
Reference in new issue