|
|
@ -3,201 +3,11 @@ use rand::{SeedableRng, Rng, thread_rng}; |
|
|
|
use std::fmt; |
|
|
|
use std::fmt::Formatter; |
|
|
|
use std::collections::{HashMap, HashSet}; |
|
|
|
use city::{HouseLayout, City, House}; |
|
|
|
|
|
|
|
pub const SIZE: usize = 16384; |
|
|
|
pub const HOUSE_RANGE: usize = 500; |
|
|
|
|
|
|
|
pub struct City { |
|
|
|
prices: Vec<u16>, |
|
|
|
buyable_house_count: usize |
|
|
|
} |
|
|
|
|
|
|
|
impl City { |
|
|
|
pub fn read_from_file(filename: &str) -> Self { |
|
|
|
let values = std::fs::read(filename).unwrap(); |
|
|
|
let mut prices: Vec<u16> = Vec::new(); |
|
|
|
|
|
|
|
for y in 0..SIZE { |
|
|
|
for x in 0..SIZE { |
|
|
|
let price = (values[(y * SIZE + x) * 2] as u16) | ((values[(y * SIZE + x) * 2 + 1] as u16) << 8); |
|
|
|
prices.push(price); |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
City::new(prices) |
|
|
|
} |
|
|
|
|
|
|
|
pub fn new(prices: Vec<u16>) -> Self { |
|
|
|
let mut buyable_house_count = 0; |
|
|
|
for &price in &prices { |
|
|
|
if price > 0 { |
|
|
|
buyable_house_count += 1; |
|
|
|
} |
|
|
|
} |
|
|
|
City { prices, buyable_house_count } |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_price(&self, house: &House) -> u16 { |
|
|
|
self.prices[house.y * SIZE + house.x] |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_price_xy(&self, x: usize, y: usize) -> u16 { |
|
|
|
self.prices[y * SIZE + x] |
|
|
|
} |
|
|
|
|
|
|
|
pub fn is_house(&self, house: &House) -> bool { |
|
|
|
self.get_price(&house) > 0 |
|
|
|
} |
|
|
|
|
|
|
|
pub fn is_house_xy(&self, x: usize, y: usize) -> bool { |
|
|
|
self.get_price_xy(x, y) > 0 |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_house_count(&self) -> usize { |
|
|
|
self.buyable_house_count |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
#[derive(Eq, PartialEq, Hash, Copy, Clone)] |
|
|
|
pub struct House { |
|
|
|
x: usize, |
|
|
|
y: usize, |
|
|
|
} |
|
|
|
|
|
|
|
impl House { |
|
|
|
pub fn new(x: usize, y: usize) -> Self { |
|
|
|
House { x, y } |
|
|
|
} |
|
|
|
|
|
|
|
pub fn range_rectangle(&self) -> Rectangle { |
|
|
|
let top = if self.y <= HOUSE_RANGE { 0 } else { self.y - HOUSE_RANGE }; |
|
|
|
let bottom = if self.y >= SIZE - 1 - HOUSE_RANGE { SIZE - 1 } else { self.y + HOUSE_RANGE }; |
|
|
|
let left = if self.x <= HOUSE_RANGE { 0 } else { self.x - HOUSE_RANGE }; |
|
|
|
let right = if self.x >= SIZE - 1 - HOUSE_RANGE { SIZE - 1 } else { self.x + HOUSE_RANGE }; |
|
|
|
Rectangle {top, bottom, left, right} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
/// Rectangle - a 2D range with inclusive bounds
|
|
|
|
pub struct Rectangle { |
|
|
|
/// The smaller x coordinate.
|
|
|
|
left: usize, |
|
|
|
/// The bigger x coordinate.
|
|
|
|
right: usize, |
|
|
|
/// The smaller y coordinate.
|
|
|
|
top: usize, |
|
|
|
/// The bigger y coordinate.
|
|
|
|
bottom: usize, |
|
|
|
} |
|
|
|
|
|
|
|
impl fmt::Display for Rectangle { |
|
|
|
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result { |
|
|
|
write!(f, "L{}-{}R T{}-{}B", self.left, self.right, self.top, self.bottom) |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
impl Rectangle { |
|
|
|
pub fn is_inside(&self, x: usize, y: usize) -> bool { |
|
|
|
self.left <= x && x <= self.right && self.top <= y && y <= self.bottom |
|
|
|
} |
|
|
|
|
|
|
|
pub fn width(&self) -> usize { |
|
|
|
self.right - self.left |
|
|
|
} |
|
|
|
|
|
|
|
pub fn height(&self) -> usize { |
|
|
|
self.bottom - self.top |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
pub struct HouseLayout<'a> { |
|
|
|
city: &'a City, |
|
|
|
reachable: Vec<u16>, |
|
|
|
houses: Vec<House>, |
|
|
|
reachable_houses: usize |
|
|
|
} |
|
|
|
|
|
|
|
impl<'a> HouseLayout<'a> { |
|
|
|
pub fn new(city: &'a City) -> Self { |
|
|
|
HouseLayout { city, reachable: vec![0; SIZE * SIZE], houses: Vec::new(), reachable_houses: 0 } |
|
|
|
} |
|
|
|
|
|
|
|
pub fn cover_count(&self, house: House) -> u16 { |
|
|
|
self.reachable[house.y * SIZE + house.x] |
|
|
|
} |
|
|
|
|
|
|
|
pub fn cover_count_xy(&self, x: usize, y: usize) -> u16 { |
|
|
|
self.reachable[y * SIZE + x] |
|
|
|
} |
|
|
|
|
|
|
|
pub fn is_covered(&self, house: House) -> bool { |
|
|
|
self.cover_count(house) > 0 |
|
|
|
} |
|
|
|
|
|
|
|
pub fn add_house(&mut self, house: House) -> usize { |
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
let index = y as usize * SIZE + x as usize; |
|
|
|
|
|
|
|
if self.reachable[index] == 0 && self.city.is_house_xy(x as usize, y as usize) { |
|
|
|
self.reachable_houses += 1; |
|
|
|
} |
|
|
|
|
|
|
|
self.reachable[index] += 1; |
|
|
|
} |
|
|
|
} |
|
|
|
self.houses.push(house); |
|
|
|
self.houses.len() - 1 |
|
|
|
} |
|
|
|
|
|
|
|
pub fn remove_house(&mut self, index: usize) { |
|
|
|
let house = self.houses.swap_remove(index); |
|
|
|
|
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
let index = y as usize * SIZE + x as usize; |
|
|
|
|
|
|
|
self.reachable[index] -= 1; |
|
|
|
|
|
|
|
if self.reachable[index] == 0 && self.city.is_house_xy(x as usize, y as usize) { |
|
|
|
self.reachable_houses -= 1; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
pub fn is_valid(&self) -> bool { |
|
|
|
self.reachable_houses == self.city.buyable_house_count |
|
|
|
} |
|
|
|
|
|
|
|
pub fn price(&self) -> u32 { |
|
|
|
get_price(self.city, &self.houses) |
|
|
|
} |
|
|
|
|
|
|
|
pub fn houses(&self) -> &Vec<House> { |
|
|
|
&self.houses |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
fn dump_layout(layout: &HouseLayout, best_price: &mut Option<u32>, seed: u64) { |
|
|
|
let price = layout.price(); |
|
|
|
if best_price.is_none() || price < best_price.unwrap() { |
|
|
|
*best_price = Some(price); |
|
|
|
eprintln!("Printing {} - new best", price); |
|
|
|
println!("New best!"); |
|
|
|
println!("Price {}, seed {}", price, seed); |
|
|
|
print_houses(&layout.houses()); |
|
|
|
println!(); |
|
|
|
} else { |
|
|
|
eprintln!("Printing {}", price); |
|
|
|
println!("Price {}, seed {}", price, seed); |
|
|
|
print_houses(&layout.houses()); |
|
|
|
println!(); |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
mod optimization; |
|
|
|
mod population; |
|
|
|
mod city; |
|
|
|
|
|
|
|
fn main() { |
|
|
|
let city = City::read_from_file("01.in"); |
|
|
@ -209,18 +19,18 @@ fn main() { |
|
|
|
let mut rng = StdRng::seed_from_u64(seed); |
|
|
|
let mut layout = HouseLayout::new(&city); |
|
|
|
eprintln!("Starting random population..."); |
|
|
|
populate_random(&mut layout, &mut rng); |
|
|
|
population::populate_random(&mut layout, &mut rng); |
|
|
|
eprintln!("Finished random init, price: {}", layout.price()); |
|
|
|
loop { |
|
|
|
let mut improved = false; |
|
|
|
eprintln!("Starting moving individual houses..."); |
|
|
|
if improve_move_individual_houses(&mut layout, &mut rng) { |
|
|
|
if optimization::improve_move_individual_houses(&mut layout, &mut rng) { |
|
|
|
dump_layout(&layout, &mut best_price, seed); |
|
|
|
improved = true; |
|
|
|
} |
|
|
|
eprintln!("Finished moving individual houses..."); |
|
|
|
eprintln!("Starting pairwise house merge..."); |
|
|
|
if improve_merge_pairwise(&mut layout) { |
|
|
|
if optimization::improve_merge_pairwise(&mut layout) { |
|
|
|
dump_layout(&layout, &mut best_price, seed); |
|
|
|
improved = true; |
|
|
|
} |
|
|
@ -232,303 +42,6 @@ fn main() { |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
fn populate_random(layout: &mut HouseLayout, rng: &mut StdRng) { |
|
|
|
loop { |
|
|
|
loop { |
|
|
|
let x = rng.gen_range(0..SIZE); |
|
|
|
let y = rng.gen_range(0..SIZE); |
|
|
|
let house = House::new(x, y); |
|
|
|
if layout.city.is_house_xy(x, y) && !layout.is_covered(house) { |
|
|
|
layout.add_house(house); |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
if layout.is_valid() { |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
fn improve_move_individual_houses(layout: &mut HouseLayout, mut rng: &mut StdRng) -> bool { |
|
|
|
let mut improved = false; |
|
|
|
let mut untried_houses = layout.houses().clone(); |
|
|
|
untried_houses.shuffle(&mut rng); |
|
|
|
|
|
|
|
while untried_houses.len() > 0 { |
|
|
|
let house = untried_houses.pop().unwrap(); |
|
|
|
let house_index = layout.houses().iter().position(|x| *x == house).unwrap(); |
|
|
|
|
|
|
|
let move_rectangle = match get_valid_move_rectangle(&layout, house) { |
|
|
|
Ok(move_rectangle) => move_rectangle, |
|
|
|
Err(RectangleSearchError::Useless) => { |
|
|
|
//let old_price = layout.price();
|
|
|
|
layout.remove_house(house_index); |
|
|
|
//let new_price = layout.price();
|
|
|
|
//let price_diff = new_price as i64 - old_price as i64;
|
|
|
|
//eprintln!(" candidate is valid, price diff: {}.", price_diff);
|
|
|
|
//eprintln!("Removed a house (useless), diff {}", price_diff);
|
|
|
|
//eprintln!("Improved price: {}", new_price);
|
|
|
|
improved = true; |
|
|
|
untried_houses = layout.houses().clone(); |
|
|
|
untried_houses.shuffle(&mut rng); |
|
|
|
continue; |
|
|
|
} |
|
|
|
_ => unreachable!() |
|
|
|
}; |
|
|
|
|
|
|
|
// TODO: Not needed, can just store best
|
|
|
|
let mut new_candidates = Vec::new(); |
|
|
|
for new_y in move_rectangle.top..=move_rectangle.bottom { |
|
|
|
for new_x in move_rectangle.left..=move_rectangle.right { |
|
|
|
if layout.city.is_house_xy(new_x, new_y) && layout.city.get_price_xy(new_x, new_y) < layout.city.get_price(&house) { |
|
|
|
new_candidates.push(House::new(new_x, new_y)); |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
new_candidates.sort_by(|a, b| layout.city.get_price(&a).cmp(&layout.city.get_price(&b))); |
|
|
|
if new_candidates.len() == 0 { |
|
|
|
//eprintln!("Did not find candidate");
|
|
|
|
} else { |
|
|
|
for (i, &candidate) in new_candidates.iter().enumerate() { |
|
|
|
//eprint!("Found candidate {}...", i);
|
|
|
|
|
|
|
|
//let old_price = layout.price();
|
|
|
|
layout.remove_house(house_index); |
|
|
|
layout.add_house(candidate); |
|
|
|
|
|
|
|
assert!(layout.is_valid()); |
|
|
|
//let new_price = layout.price();
|
|
|
|
//let price_diff = new_price as i64 - old_price as i64;
|
|
|
|
//eprintln!(" candidate is valid, price diff: {}.", price_diff);
|
|
|
|
//eprintln!("Improved price: {}", new_price);
|
|
|
|
improved = true; |
|
|
|
untried_houses = layout.houses().clone(); |
|
|
|
untried_houses.shuffle(&mut rng); |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
improved |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
pub fn improve_merge_pairwise(layout: &mut HouseLayout) -> bool { |
|
|
|
let mut improved = false; |
|
|
|
|
|
|
|
loop { |
|
|
|
// This here is a hack for being unable to modify the houses while looping through them.
|
|
|
|
// We instead go through the houses repeatedly and remember which pairs we have already
|
|
|
|
// tried by hashing their values because they can and do move throughout the layout Vec
|
|
|
|
// as it's being modified.
|
|
|
|
let mut checked = HashSet::new(); |
|
|
|
|
|
|
|
let mut loop_improved = false; |
|
|
|
loop { |
|
|
|
let mut merge = None; |
|
|
|
|
|
|
|
'outer_houses: for i in 0..layout.houses().len() { |
|
|
|
for j in i + 1..layout.houses().len() { |
|
|
|
let house1 = layout.houses()[i]; |
|
|
|
let house2 = layout.houses()[j]; |
|
|
|
|
|
|
|
let x_dist = (house1.x as i32 - house2.x as i32).abs() as usize; |
|
|
|
let y_dist = (house1.y as i32 - house2.y as i32).abs() as usize; |
|
|
|
if x_dist > 4 * HOUSE_RANGE || y_dist > 4 * HOUSE_RANGE { |
|
|
|
// Never close enough to merge
|
|
|
|
continue; |
|
|
|
} |
|
|
|
|
|
|
|
if checked.contains(&(house1, house2)) || checked.contains(&(house2, house1)) { |
|
|
|
continue; |
|
|
|
} else { |
|
|
|
checked.insert((house1, house2)); |
|
|
|
} |
|
|
|
|
|
|
|
match get_valid_move_rectangle_multiple(&layout, &vec! {house1, house2}) { |
|
|
|
Ok(rect) => { |
|
|
|
let mut cheapest = None; |
|
|
|
for y in rect.top..=rect.bottom { |
|
|
|
for x in rect.left..=rect.right { |
|
|
|
if !layout.city.is_house_xy(x, y) { continue; } |
|
|
|
let price = layout.city.get_price_xy(x, y); |
|
|
|
match cheapest { |
|
|
|
None => cheapest = Some((x, y, price)), |
|
|
|
Some((_, _, cheapest_price)) if price < cheapest_price => cheapest = Some((x, y, price)), |
|
|
|
_ => {} |
|
|
|
}; |
|
|
|
} |
|
|
|
} |
|
|
|
if let Some((x, y, price)) = cheapest { |
|
|
|
if price >= layout.city.get_price(&house1) + layout.city.get_price(&house2) { |
|
|
|
// Merging not worth
|
|
|
|
//eprintln!("Merging not worth!");
|
|
|
|
} else { |
|
|
|
merge = Some((i, j, House::new(x, y))); |
|
|
|
break 'outer_houses; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
Err(RectangleSearchError::Useless) => eprintln!("Found useless pair of houses, not solving!"), |
|
|
|
Err(RectangleSearchError::Unsatisfiable) => {} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
if let Some((i, j, house)) = merge { |
|
|
|
let old_price = layout.price(); |
|
|
|
assert!(i < j); |
|
|
|
layout.remove_house(j); |
|
|
|
layout.remove_house(i); |
|
|
|
layout.add_house(house); |
|
|
|
|
|
|
|
assert!(layout.is_valid()); |
|
|
|
let new_price = layout.price(); |
|
|
|
let price_diff = new_price as i32 - old_price as i32; |
|
|
|
eprintln!("Merged two houses, new price {}, diff {}", new_price, price_diff); |
|
|
|
improved = true; |
|
|
|
loop_improved = true; |
|
|
|
} else { |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
if !loop_improved { |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
improved |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
pub enum RectangleSearchError { |
|
|
|
Useless, |
|
|
|
Unsatisfiable |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_valid_move_rectangle_multiple(layout: &HouseLayout, houses: &Vec<House>) -> Result<Rectangle, RectangleSearchError> { |
|
|
|
// This is a generalization of get_valid_move_rectangle, it's basically the same thing,
|
|
|
|
// just with a dynamic rectangles_containing_count
|
|
|
|
|
|
|
|
// We first establish a bounding box for an that has to be covered if all houses are removed.
|
|
|
|
let mut covered_rect: Option<Rectangle> = None; |
|
|
|
for house in houses { |
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
// We count how many rectangles of houses contain this xy position.
|
|
|
|
let mut rectangles_containing_count = 0; |
|
|
|
for house in houses { |
|
|
|
let rect = house.range_rectangle(); |
|
|
|
if rect.is_inside(x, y) { |
|
|
|
rectangles_containing_count += 1; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
// If this house is covered by the exact amount of rectangles,
|
|
|
|
// then removing all input houses would uncover this position.
|
|
|
|
// It cannot be less than the rectangle count, and more means there
|
|
|
|
// is another house covering it as well.
|
|
|
|
if layout.cover_count_xy(x, y) == rectangles_containing_count && layout.city.is_house_xy(x, y) { |
|
|
|
if let Some(cover) = &mut covered_rect { |
|
|
|
cover.left = cover.left.min(x); |
|
|
|
cover.right = cover.right.max(x); |
|
|
|
cover.top = cover.top.min(y); |
|
|
|
cover.bottom = cover.bottom.max(y); |
|
|
|
} else { |
|
|
|
covered_rect = Some(Rectangle { left: x, right: x, top: y, bottom: y }); |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
}; |
|
|
|
|
|
|
|
if covered_rect.is_none() { |
|
|
|
// Unnecessary set of houses.
|
|
|
|
return Err(RectangleSearchError::Useless); |
|
|
|
} |
|
|
|
|
|
|
|
let covered_rect = covered_rect.unwrap(); |
|
|
|
|
|
|
|
let height_margin = HOUSE_RANGE as i32 - covered_rect.height() as i32; |
|
|
|
let width_margin = HOUSE_RANGE as i32 - covered_rect.width() as i32; |
|
|
|
|
|
|
|
let top = (covered_rect.top as i32 - height_margin).max(0) as usize; |
|
|
|
let left = (covered_rect.left as i32 - width_margin).max(0) as usize; |
|
|
|
let bottom = (covered_rect.bottom + height_margin as usize).min(SIZE - 1); |
|
|
|
let right = (covered_rect.right + width_margin as usize).min(SIZE - 1); |
|
|
|
|
|
|
|
if top > bottom || left > right { |
|
|
|
// Unsatisfiable rectangle by one house
|
|
|
|
return Err(RectangleSearchError::Unsatisfiable); |
|
|
|
} |
|
|
|
|
|
|
|
Ok(Rectangle { left, right, top, bottom }) |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_valid_move_rectangle(layout: &HouseLayout, house: House) -> Result<Rectangle, RectangleSearchError> { |
|
|
|
// We first establish a bounding box for an that has to be covered if the house is removed.
|
|
|
|
let mut covered_rect: Option<Rectangle> = None; |
|
|
|
|
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
if layout.cover_count_xy(x, y) == 1 && layout.city.is_house_xy(x, y) { |
|
|
|
// This house is only covered by the house, it has to be covered from the new position as well.
|
|
|
|
if let Some(cover) = &mut covered_rect { |
|
|
|
cover.left = cover.left.min(x); |
|
|
|
cover.right = cover.right.max(x); |
|
|
|
cover.top = cover.top.min(y); |
|
|
|
cover.bottom = cover.bottom.max(y); |
|
|
|
} else { |
|
|
|
covered_rect = Some(Rectangle { left: x, right: x, top: y, bottom: y }); |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
if covered_rect.is_none() { |
|
|
|
return Err(RectangleSearchError::Useless) |
|
|
|
} |
|
|
|
|
|
|
|
let covered_rect = covered_rect.unwrap(); |
|
|
|
|
|
|
|
// The distance of the rectangle from the original box tells us how much the house can move.
|
|
|
|
let dist_left = covered_rect.left - range_rect.left; |
|
|
|
let dist_right = range_rect.right - covered_rect.right; |
|
|
|
let dist_top = covered_rect.top - range_rect.top; |
|
|
|
let dist_bottom = range_rect.bottom - covered_rect.bottom; |
|
|
|
|
|
|
|
let left = if house.x <= dist_right { 0 } else { house.x - dist_right }; |
|
|
|
let right = if house.x >= SIZE - 1 - dist_left { SIZE - 1 } else { house.x + dist_left }; |
|
|
|
let top = if house.y <= dist_bottom { 0 } else { house.y - dist_bottom }; |
|
|
|
let bottom = if house.y >= SIZE - 1 - dist_top { SIZE - 1 } else { house.y + dist_top }; |
|
|
|
|
|
|
|
let valid_move_rectangle = Rectangle { |
|
|
|
left, right, top, bottom |
|
|
|
}; |
|
|
|
|
|
|
|
Ok(valid_move_rectangle) |
|
|
|
} |
|
|
|
|
|
|
|
pub fn get_neighbors(city: &City, house: &House) -> Vec<House> { |
|
|
|
let mut neighbors = Vec::new(); |
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
let house = House::new(x as usize, y as usize); |
|
|
|
if city.get_price(&house) > 0 { |
|
|
|
neighbors.push(house); |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
neighbors |
|
|
|
} |
|
|
|
|
|
|
|
fn print_houses(houses: &Vec<House>) { |
|
|
|
println!("{}", houses.len()); |
|
|
|
for house in houses { |
|
|
@ -536,73 +49,20 @@ fn print_houses(houses: &Vec<House>) { |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
fn get_price(city: &City, houses: &Vec<House>) -> u32 { |
|
|
|
let mut price = 0u32; |
|
|
|
for house in houses { |
|
|
|
price += city.get_price(&house) as u32; |
|
|
|
} |
|
|
|
|
|
|
|
price |
|
|
|
} |
|
|
|
|
|
|
|
fn is_valid(city: &City, houses: &Vec<House>) -> Option<u32> { |
|
|
|
let mut reachable = vec![false; SIZE * SIZE]; |
|
|
|
let mut price = 0u32; |
|
|
|
|
|
|
|
for house in houses { |
|
|
|
assert!(city.prices[house.y * SIZE + house.x] > 0); |
|
|
|
|
|
|
|
let range_rect = house.range_rectangle(); |
|
|
|
for y in range_rect.top..=range_rect.bottom { |
|
|
|
for x in range_rect.left..=range_rect.right { |
|
|
|
reachable[y as usize * SIZE + x as usize] = true; |
|
|
|
} |
|
|
|
} |
|
|
|
price += city.get_price(&house) as u32; |
|
|
|
} |
|
|
|
|
|
|
|
for y in 0..SIZE { |
|
|
|
for x in 0..SIZE { |
|
|
|
if !reachable[y * SIZE + x] && city.prices[y * SIZE + x] > 0 { |
|
|
|
return None; |
|
|
|
} |
|
|
|
} |
|
|
|
fn dump_layout(layout: &HouseLayout, best_price: &mut Option<u32>, seed: u64) { |
|
|
|
let price = layout.price(); |
|
|
|
if best_price.is_none() || price < best_price.unwrap() { |
|
|
|
*best_price = Some(price); |
|
|
|
eprintln!("Printing {} - new best", price); |
|
|
|
println!("New best!"); |
|
|
|
println!("Price {}, seed {}", price, seed); |
|
|
|
print_houses(&layout.houses()); |
|
|
|
println!(); |
|
|
|
} else { |
|
|
|
eprintln!("Printing {}", price); |
|
|
|
println!("Price {}, seed {}", price, seed); |
|
|
|
print_houses(&layout.houses()); |
|
|
|
println!(); |
|
|
|
} |
|
|
|
|
|
|
|
Some(price) |
|
|
|
} |
|
|
|
|
|
|
|
#[cfg(test)] |
|
|
|
mod tests { |
|
|
|
use super::*; |
|
|
|
|
|
|
|
#[test] |
|
|
|
fn house_rectangle_at_min() { |
|
|
|
let house = House::new(0, 0); |
|
|
|
let rect = house.range_rectangle(); |
|
|
|
assert_eq!(rect.top, 0); |
|
|
|
assert_eq!(rect.left, 0); |
|
|
|
assert_eq!(rect.right, HOUSE_RANGE); |
|
|
|
assert_eq!(rect.bottom, HOUSE_RANGE); |
|
|
|
} |
|
|
|
|
|
|
|
#[test] |
|
|
|
fn house_rectangle_at_max() { |
|
|
|
let house = House::new(SIZE - 1, SIZE - 1); |
|
|
|
let rect = house.range_rectangle(); |
|
|
|
assert_eq!(rect.top, SIZE - 1 - HOUSE_RANGE); |
|
|
|
assert_eq!(rect.left, SIZE - 1 - HOUSE_RANGE); |
|
|
|
assert_eq!(rect.right, SIZE - 1); |
|
|
|
assert_eq!(rect.bottom, SIZE - 1); |
|
|
|
} |
|
|
|
|
|
|
|
#[test] |
|
|
|
fn house_rect_in_middle() { |
|
|
|
let house = House::new(SIZE / 2, SIZE / 2); |
|
|
|
let rect = house.range_rectangle(); |
|
|
|
assert_eq!(rect.top, house.y - HOUSE_RANGE); |
|
|
|
assert_eq!(rect.left, house.x - HOUSE_RANGE); |
|
|
|
assert_eq!(rect.right, house.x + HOUSE_RANGE); |
|
|
|
assert_eq!(rect.bottom, house.y + HOUSE_RANGE); |
|
|
|
} |
|
|
|
} |