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85bbc6e9d8 ... 04dcd76a22

Author SHA1 Message Date
Tristan Daniël Maat 04dcd76a22
WIP: Re-implement using ndarray 2020-12-14 15:31:05 +00:00
Tristan Daniël Maat 279e9d8cc7
Re-implement day 11.1 with graphs 
This is to have a potentially nicer way to iterate neighbours, as well
as recursive directions.

While the former is neater than it was previously, the latter sadly
wasn't possible after all, and it's very inefficient.
 2020-12-12 23:49:27 +00:00
Tristan Daniël Maat 6dd5d1a04c
Complete day 11.1 2020-12-12 20:41:49 +00:00
4 changed files with 366 additions and 0 deletions
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141
day-11/Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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name = "day-11"
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11
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[package]
name = "day-11"
version = "0.1.0"
authors = ["Tristan Daniël Maat <tm@tlater.net>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
indoc = "0.3"
ndarray = "0.14"

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LLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLL.LLLLLLLL
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..L....LL..LL.LLLL......L..L...LLL.L......L.L.....L....L....LLLL.....L..LL...L....L....LLL....LL.
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LLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLL..LLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLLL.LL
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LLLLLLLLLL.LLLLLLLLL.LLL.LLLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLL
LLLLLLLLLL.LLLL.LLL.LLLLLLLLL.LLLLL.LLLLLLL.LLLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLL.LL.LLLLLLLL
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LLLLLLLLLL.LLLL.LLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
..L.L.....L......L..L.....L.......L..L....LL...L.L.L...LLL.L.L..L..L..L......LLL.....L..L..L.....
LLLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLL.LLLLLLL.LLLLLLL.LLLLLL.LLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
LLLLLLLLLL.LLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLL.LLLLLLLL
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LLLLLLLLLL.LLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLLL..LLLLLLLLLLLL.LLLLLLLL
LLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL
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use std::fs;
use std::iter;
use ndarray::Array2;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let input = fs::read_to_string("input")?;
let layout = parse_layout(&input)?;
// Part 1
let result = count_with_neighboring_seats(&layout);
println!("{}", result);
// Part 2
let result = count_with_directional_seats(&layout);
println!("{}", result);
Ok(())
}
type Layout = Array2<Seating>;
#[derive(Copy, Clone, Debug, PartialEq)]
enum Seating {
Occupied,
Empty,
Floor,
}
impl Seating {
fn new(symbol: char) -> Result<Self, String> {
match symbol {
'#' => Ok(Seating::Occupied),
'L' => Ok(Seating::Empty),
'.' => Ok(Seating::Floor),
rubbish => Err(format!("Found some rubbish on the floor, area must be clean to conserve human behavior: {}", rubbish))
}
}
}
fn parse_layout(input: &str) -> Result<Layout, String> {
let (i, j) = (
input.lines().count(),
input.lines().next().ok_or("Waiting room too small")?.len(),
);
// Padding the input data so that we can later comfortably produce
// a convolution
let grid = input
.lines()
.flat_map(|line| {
iter::once(Ok(Seating::Floor))
.chain(line.chars().map(Seating::new))
.chain(iter::once(Ok(Seating::Floor)))
})
.collect::<Result<Vec<Seating>, String>>()?;
Array2::from_shape_vec((i, j), grid)
.map_err(|_| "Non-square waiting rooms don't exist".to_string())
}
fn count_with_neighboring_seats(layout: &Layout) -> usize {
unimplemented!()
}
fn count_with_directional_seats(layout: &Layout) -> usize {
unimplemented!()
}
#[cfg(test)]
mod tests {
use super::*;
use indoc::indoc;
#[test]
fn test_simple() -> Result<(), Box<dyn std::error::Error>> {
let input = indoc!(
"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 layout = parse_layout(&input)?;
let result = count_with_neighboring_seats(&layout);
assert_eq!(result, 37);
Ok(())
}
#[test]
fn test_simple2() -> Result<(), Box<dyn std::error::Error>> {
let input = indoc!(
"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 layout = parse_layout(&input)?;
let result = count_with_directional_seats(&layout);
assert_eq!(result, 37);
Ok(())
}
}