Added day 11
This commit is contained in:
parent
f057a94b2c
commit
3059d8f9b5
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@ -0,0 +1,115 @@
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use itertools::Itertools;
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use std::collections::HashMap;
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use std::error::Error;
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::vec::Vec;
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#[derive(PartialEq, Copy, Clone)]
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enum Seat {
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Floor,
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Empty,
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Occupied,
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}
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fn print_seats(seats: &Vec<Vec<Seat>>) {
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println!("==========================================");
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for y in 0..seats.len() {
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let mut line = String::new();
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for x in 0..seats[y].len() {
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match seats[y][x] {
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Seat::Floor => line.push_str("."),
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Seat::Empty => line.push_str("L"),
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Seat::Occupied => line.push_str("#"),
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};
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}
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println!("{}", line)
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}
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println!("==========================================");
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}
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fn is_occupied(x: i32, y: i32, seats: &Vec<Vec<Seat>>) -> usize {
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if y >= 0
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&& y < seats.len() as i32
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&& x >= 0
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&& x < seats[y as usize].len() as i32
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&& seats[y as usize][x as usize] == Seat::Occupied
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{
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1
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} else {
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0
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}
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}
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fn count_adjacent(x: usize, y: usize, seats: &Vec<Vec<Seat>>) -> usize {
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let ix = x as i32;
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let iy = y as i32;
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is_occupied(ix - 1, iy - 1, seats)
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+ is_occupied(ix, iy - 1, seats)
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+ is_occupied(ix + 1, iy - 1, seats)
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+ is_occupied(ix - 1, iy, seats)
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+ is_occupied(ix + 1, iy, seats)
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+ is_occupied(ix - 1, iy + 1, seats)
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+ is_occupied(ix, iy + 1, seats)
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+ is_occupied(ix + 1, iy + 1, seats)
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}
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fn main() -> Result<(), Box<dyn Error>> {
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let file = File::open("inputs/day11.txt")?;
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let lines = io::BufReader::new(file).lines().map(|l| l.unwrap());
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let mut seats: Vec<Vec<Seat>> = lines
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.map(|l| {
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l.chars()
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.map(|c| match c {
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'.' => Seat::Floor,
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'L' => Seat::Empty,
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'#' => Seat::Occupied,
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_ => panic!("Unkown char {}", c),
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})
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.collect()
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})
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.collect();
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let mut changed = true;
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while changed {
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changed = false;
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let mut next_seats: Vec<Vec<Seat>> = Vec::new();
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//print_seats(&seats);
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for y in 0..seats.len() {
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let mut next_row: Vec<Seat> = Vec::new();
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for x in 0..seats[y].len() {
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if seats[y][x] == Seat::Occupied && count_adjacent(x, y, &seats) >= 4 {
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next_row.push(Seat::Empty);
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changed = true;
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} else if seats[y][x] == Seat::Empty && count_adjacent(x, y, &seats) == 0 {
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next_row.push(Seat::Occupied);
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changed = true;
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} else {
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next_row.push(seats[y][x]);
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}
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}
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next_seats.push(next_row);
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}
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seats = next_seats;
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}
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let count = seats
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.iter()
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.map(|r| {
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r.iter()
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.map(|s| if *s == Seat::Occupied { 1 } else { 0 })
|
||||
.fold(0, |x, acc| x + acc)
|
||||
})
|
||||
.fold(0, |x, acc| x + acc);
|
||||
|
||||
println!("Count: {}", count);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
|
@ -0,0 +1,118 @@
|
|||
use itertools::Itertools;
|
||||
use std::collections::HashMap;
|
||||
use std::error::Error;
|
||||
use std::fs::File;
|
||||
use std::io::{self, BufRead};
|
||||
use std::vec::Vec;
|
||||
|
||||
#[derive(PartialEq, Copy, Clone)]
|
||||
enum Seat {
|
||||
Floor,
|
||||
Empty,
|
||||
Occupied,
|
||||
}
|
||||
|
||||
fn print_seats(seats: &Vec<Vec<Seat>>) {
|
||||
println!("==========================================");
|
||||
for y in 0..seats.len() {
|
||||
let mut line = String::new();
|
||||
for x in 0..seats[y].len() {
|
||||
match seats[y][x] {
|
||||
Seat::Floor => line.push_str("."),
|
||||
Seat::Empty => line.push_str("L"),
|
||||
Seat::Occupied => line.push_str("#"),
|
||||
};
|
||||
}
|
||||
println!("{}", line)
|
||||
}
|
||||
println!("==========================================");
|
||||
}
|
||||
|
||||
fn sees_occupied(x: usize, y: usize, slope: (i32, i32), seats: &Vec<Vec<Seat>>) -> usize {
|
||||
let mut ix = x as i32;
|
||||
let mut iy = y as i32;
|
||||
|
||||
loop {
|
||||
ix += slope.0;
|
||||
iy += slope.1;
|
||||
if iy < 0 || iy >= seats.len() as i32 || ix < 0 || ix >= seats[iy as usize].len() as i32 {
|
||||
return 0;
|
||||
}
|
||||
|
||||
match seats[iy as usize][ix as usize] {
|
||||
Seat::Occupied => return 1,
|
||||
Seat::Empty => return 0,
|
||||
_ => {}
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
fn count_occupied(x: usize, y: usize, seats: &Vec<Vec<Seat>>) -> usize {
|
||||
sees_occupied(x, y, (-1, -1), seats)
|
||||
+ sees_occupied(x, y, (0, -1), seats)
|
||||
+ sees_occupied(x, y, (1, -1), seats)
|
||||
+ sees_occupied(x, y, (-1, 0), seats)
|
||||
+ sees_occupied(x, y, (1, 0), seats)
|
||||
+ sees_occupied(x, y, (-1, 1), seats)
|
||||
+ sees_occupied(x, y, (0, 1), seats)
|
||||
+ sees_occupied(x, y, (1, 1), seats)
|
||||
}
|
||||
|
||||
fn main() -> Result<(), Box<dyn Error>> {
|
||||
let file = File::open("inputs/day11.txt")?;
|
||||
let lines = io::BufReader::new(file).lines().map(|l| l.unwrap());
|
||||
|
||||
let mut seats: Vec<Vec<Seat>> = lines
|
||||
.map(|l| {
|
||||
l.chars()
|
||||
.map(|c| match c {
|
||||
'.' => Seat::Floor,
|
||||
'L' => Seat::Empty,
|
||||
'#' => Seat::Occupied,
|
||||
_ => panic!("Unkown char {}", c),
|
||||
})
|
||||
.collect()
|
||||
})
|
||||
.collect();
|
||||
|
||||
let mut changed = true;
|
||||
|
||||
while changed {
|
||||
changed = false;
|
||||
let mut next_seats: Vec<Vec<Seat>> = Vec::new();
|
||||
|
||||
//print_seats(&seats);
|
||||
|
||||
for y in 0..seats.len() {
|
||||
let mut next_row: Vec<Seat> = Vec::new();
|
||||
for x in 0..seats[y].len() {
|
||||
if seats[y][x] == Seat::Occupied && count_occupied(x, y, &seats) >= 5 {
|
||||
next_row.push(Seat::Empty);
|
||||
changed = true;
|
||||
} else if seats[y][x] == Seat::Empty && count_occupied(x, y, &seats) == 0 {
|
||||
next_row.push(Seat::Occupied);
|
||||
changed = true;
|
||||
} else {
|
||||
next_row.push(seats[y][x]);
|
||||
}
|
||||
}
|
||||
|
||||
next_seats.push(next_row);
|
||||
}
|
||||
|
||||
seats = next_seats;
|
||||
}
|
||||
|
||||
let count = seats
|
||||
.iter()
|
||||
.map(|r| {
|
||||
r.iter()
|
||||
.map(|s| if *s == Seat::Occupied { 1 } else { 0 })
|
||||
.fold(0, |x, acc| x + acc)
|
||||
})
|
||||
.fold(0, |x, acc| x + acc);
|
||||
|
||||
println!("Count: {}", count);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
Loading…
Reference in New Issue