Add days 11, 12

This commit is contained in:
2021-02-07 18:20:34 +11:00
parent 263bbbb5a2
commit 5fdb3c5a37
213 changed files with 1731 additions and 58 deletions

86
11-seating_system/Cargo.lock generated Normal file
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@@ -0,0 +1,86 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
[[package]]
name = "anyhow"
version = "1.0.38"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "afddf7f520a80dbf76e6f50a35bca42a2331ef227a28b3b6dc5c2e2338d114b1"
[[package]]
name = "either"
version = "1.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
[[package]]
name = "itertools"
version = "0.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "37d572918e350e82412fe766d24b15e6682fb2ed2bbe018280caa810397cb319"
dependencies = [
"either",
]
[[package]]
name = "proc-macro2"
version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
dependencies = [
"unicode-xid",
]
[[package]]
name = "quote"
version = "1.0.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
dependencies = [
"proc-macro2",
]
[[package]]
name = "seating_system"
version = "0.1.0"
dependencies = [
"anyhow",
"itertools",
"thiserror",
]
[[package]]
name = "syn"
version = "1.0.60"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c700597eca8a5a762beb35753ef6b94df201c81cca676604f547495a0d7f0081"
dependencies = [
"proc-macro2",
"quote",
"unicode-xid",
]
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name = "thiserror"
version = "1.0.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "76cc616c6abf8c8928e2fdcc0dbfab37175edd8fb49a4641066ad1364fdab146"
dependencies = [
"thiserror-impl",
]
[[package]]
name = "thiserror-impl"
version = "1.0.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9be73a2caec27583d0046ef3796c3794f868a5bc813db689eed00c7631275cd1"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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View File

@@ -7,3 +7,6 @@ edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.37"
itertools = "0.10.0"
thiserror = "1.0.23"

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LLLLLLLL.LLLLLLL.L.LLLL.LLLLL.LLLLL.LLLLLLLLLLLLLLL..LLLLLL.LLLLLLLLL.LLLLLLLL..LLLLLLLLLLLLLL.L
LLLLLLLL.LLLLLLLLL.LLLL.LLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLL.LLLL.LL.LLLLLLLL.LLLLLL.LLLLLL.LLL
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@@ -1,3 +1,377 @@
fn main() {
println!("Hello, world!");
use std::{fmt, iter::FromIterator, mem, vec};
use anyhow::{anyhow, Result};
use fmt::{Display};
use itertools::Itertools;
#[derive(Clone, Copy, PartialEq)]
enum TileType {
Floor,
Empty,
Occupied,
}
impl Default for TileType {
fn default() -> Self {
Self::Floor
}
}
impl Display for TileType {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", match self {
TileType::Floor => '.',
TileType::Empty => 'L',
TileType::Occupied => '#',
})
}
}
impl fmt::Debug for TileType {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", match self {
TileType::Floor => ".",
TileType::Empty => "L",
TileType::Occupied => "#",
})
}
}
impl TileType {
fn change<T>(&self, i: T) -> TileType where
T: IntoIterator<Item = TileType> {
match self {
TileType::Empty => {
if i.into_iter()
.filter(|&x| x == TileType::Occupied)
.count() == 0 {
TileType::Occupied
} else {
*self
}
}
TileType::Occupied => {
if i.into_iter()
.filter(|&x| x == TileType::Occupied)
.count() >= 4 {
TileType::Empty
} else {
*self
}
}
_ => {
*self
}
}
}
fn change_step2<T>(&self, i: T) -> TileType where
T: IntoIterator<Item = TileType> {
match self {
TileType::Empty => {
if i.into_iter()
.filter(|&x| x == TileType::Occupied)
.count() == 0 {
TileType::Occupied
} else {
*self
}
}
TileType::Occupied => {
if i.into_iter()
.filter(|&x| x == TileType::Occupied)
.count() >= 5 {
TileType::Empty
} else {
*self
}
}
_ => {
*self
}
}
}}
impl From<char> for TileType {
fn from(c: char) -> Self {
match c {
'.' => TileType::Floor,
'L' => TileType::Empty,
'#' => TileType::Occupied,
_ => unreachable!()
}
}
}
#[derive(Debug, Clone, Copy, PartialEq)]
struct Vec2 {
x: i64,
y: i64,
}
impl<T> From<(T, T)> for Vec2
where T: Into<i64> {
fn from((x, y): (T, T)) -> Self {
Self {
x: x.into(),
y: y.into()
}
}
}
impl<T> From<Vec2> for (T, T)
where T: From<i64> {
fn from(v: Vec2) -> Self {
(v.x.into(), v.y.into())
}
}
impl FromIterator<Vec2> for Vec<(i64, i64)> {
fn from_iter<T: IntoIterator<Item = Vec2>>(iter: T) -> Self {
iter
.into_iter()
.map(|v| (v.x, v.y))
.collect()
}
}
#[derive(Debug, Clone, PartialEq)]
struct Map {
size: Vec2,
tiles: Vec<TileType>,
}
impl Display for Map {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
for i in 0..self.size.x {
for j in 0..self.size.y {
write!(f, "{}", self.get((i,j).into()).unwrap())?;
}
writeln!(f)?
};
Ok(())
}
}
impl Map {
fn new(size: Vec2) -> Self {
let num_tiles = size.x * size.y;
Self {
size,
tiles: vec![Default::default(); num_tiles as usize]
}
}
fn index(&self, pos: Vec2) -> Option<usize> {
match (pos.x, pos.y) {
(x, y) if (0..self.size.x).contains(&x) && (0..self.size.y).contains(&y) => Some((pos.x * self.size.y + pos.y) as usize),
_ => None,
}
}
fn set(&mut self, pos: Vec2, val: TileType) -> Result<()> {
if let Some(index) = self.index(pos) {
self.tiles[index] = val;
Ok(())
} else {
Err(anyhow!("Invalid pos {:?} in map of size {:?}", pos, self.size))
}
}
fn get(&self, pos: Vec2) -> Option<TileType> {
Some(self.tiles[self.index(pos)?])
}
fn neighbors(&self, pos: Vec2) -> impl Iterator<Item = Vec2> {
(-1..=1)
.cartesian_product(-1..=1)
.filter(|v| v != &(0, 0))
.map(move |(dx,dy)| Vec2{
x: pos.x + dx,
y: pos.y + dy
})
}
fn neighbors_step2(&self, pos: Vec2) -> impl Iterator<Item = Vec2> {
let mut v: Vec<Vec2> = vec![];
(-1..=1)
.cartesian_product(-1..=1)
.filter(|v| v != &(0, 0))
.for_each(|(dx,dy)| {
let mut ray = pos.clone();
loop {
ray.x += dx;
ray.y += dy;
if let Some(tile) = self.get(ray) {
if tile == TileType::Empty || tile == TileType::Occupied {
v.push(ray);
break;
}
} else {
break;
}
}
});
v.into_iter()
}
fn neighbor_tiles(&self, pos: Vec2) -> impl Iterator<Item = TileType> + '_ {
self.neighbors(pos)
.filter_map(move |v| self.get(v))
}
fn neighbor_tiles_step2(&self, pos: Vec2)
-> impl Iterator<Item = TileType> + '_ {
self.neighbors_step2(pos)
.filter_map(move |v| self.get(v))
}
fn read(input: &str) -> Result<Self> {
// Read map size
let size = (
input.lines().count() as i64,
input.lines().next().ok_or_else(|| anyhow!("No lines in input !"))?.chars().count() as i64
);
let mut m = Self::new(size.into());
input
.chars()
.filter(|&c| c != '\n')
.zip(m.tiles.iter_mut())
.for_each(|(x, y)| *y = x.into());
Ok(m)
}
fn update_to(&self, new: &mut Map) {
for i in 0..self.size.x {
for j in 0..self.size.y {
let pos = (i,j).into();
new.set(
pos,
self.get(pos)
.unwrap()
.change(
self.neighbor_tiles(pos)
)
).unwrap();
}
}
}
fn update_to_step2(&self, new: &mut Map) {
for i in 0..self.size.x {
for j in 0..self.size.y {
let pos = (i,j).into();
new.set(
pos,
self.get(pos)
.unwrap()
.change_step2(
self.neighbor_tiles_step2(pos)
)
).unwrap();
}
}
}
}
fn step1(input: &str) -> usize {
let mut m = Map::read(input).unwrap();
let mut n = m.clone();
let mut i = 0;
loop {
i += 1;
println!("Stage {}", i);
mem::swap(&mut m,&mut n);
m.update_to(&mut n);
// println!("{}", &m);
// println!("{}", &n);
// Naive, as update_to could also report nb of changes
if n == m {
break;
}
};
m.tiles.into_iter().filter(|&c| c == TileType::Occupied).count()
}
fn step2(input: &str) -> usize {
let mut m = Map::read(input).unwrap();
let mut n = m.clone();
let mut i = 0;
loop {
i += 1;
println!("Stage {}", i);
mem::swap(&mut m,&mut n);
m.update_to_step2(&mut n);
// println!("{}", &m);
// println!("{}", &n);
// Naive, as update_to could also report nb of changes
if n == m {
break;
}
};
m.tiles.into_iter().filter(|&c| c == TileType::Occupied).count()
}
fn main() {
let input = include_str!("../data/input.txt");
dbg!(step1(input));
dbg!(step2(input));
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_phase1() {
let input = r"L.LL.LL.LL
LLLLLLL.LL
L.L.L..L..
LLLL.LL.LL
L.LL.LL.LL
L.LLLLL.LL
..L.L.....
LLLLLLLLLL
L.LLLLLL.L
L.LLLLL.LL";
assert_eq!(step1(input), 37)
}
#[test]
fn test_read() {
let input = r"L.LL.LL.LL
LLLLLLL.LL
L.L.L..L..
LLLL.LL.LL
L.LL.LL.LL
L.LLLLL.LL
..L.L.....
LLLLLLLLLL
L.LLLLLL.L
L.LLLLL.LL
";
let m = Map::read(input).unwrap();
assert_eq!(m.index((0,1).into()).unwrap(), 1);
assert_eq!(m.get((0,1).into()).unwrap(), TileType::Floor);
assert_eq!(format!("{}",m), input);
}
#[test]
fn test_neighbors() {
let m = Map::new(Vec2 { x: 5, y: 5 });
let n = m.neighbors((1,1).into());
assert_eq!(
n.collect::<Vec<(_,_)>>(),
vec![
(0,0),
(0,1),
(0,2),
(1,0),
(1,2),
(2,0),
(2,1),
(2,2),
]
);
}
}