add pathfinding crate and day 17 solution
parent
3acf590033
commit
e39af55e73
|
|
@ -62,6 +62,7 @@ dependencies = [
|
|||
"aoc-runner",
|
||||
"aoc-runner-derive",
|
||||
"num",
|
||||
"pathfinding",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
|
|
@ -70,6 +71,55 @@ version = "1.1.0"
|
|||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
|
||||
|
||||
[[package]]
|
||||
name = "deprecate-until"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7a3767f826efbbe5a5ae093920b58b43b01734202be697e1354914e862e8e704"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"semver",
|
||||
"syn 2.0.39",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "equivalent"
|
||||
version = "1.0.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
|
||||
|
||||
[[package]]
|
||||
name = "fixedbitset"
|
||||
version = "0.4.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
|
||||
|
||||
[[package]]
|
||||
name = "hashbrown"
|
||||
version = "0.14.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
|
||||
|
||||
[[package]]
|
||||
name = "indexmap"
|
||||
version = "2.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
|
||||
dependencies = [
|
||||
"equivalent",
|
||||
"hashbrown",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "integer-sqrt"
|
||||
version = "0.1.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "276ec31bcb4a9ee45f58bec6f9ec700ae4cf4f4f8f2fa7e06cb406bd5ffdd770"
|
||||
dependencies = [
|
||||
"num-traits",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "itoa"
|
||||
version = "1.0.9"
|
||||
|
|
@ -164,6 +214,21 @@ dependencies = [
|
|||
"autocfg",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "pathfinding"
|
||||
version = "4.8.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f6f4a3f5089b981000cb50ec24320faf7a19649a45e8730e4adf49f78f066528"
|
||||
dependencies = [
|
||||
"deprecate-until",
|
||||
"fixedbitset",
|
||||
"indexmap",
|
||||
"integer-sqrt",
|
||||
"num-traits",
|
||||
"rustc-hash",
|
||||
"thiserror",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "proc-macro2"
|
||||
version = "1.0.70"
|
||||
|
|
@ -211,12 +276,24 @@ version = "0.8.2"
|
|||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
|
||||
|
||||
[[package]]
|
||||
name = "rustc-hash"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
|
||||
|
||||
[[package]]
|
||||
name = "ryu"
|
||||
version = "1.0.15"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1ad4cc8da4ef723ed60bced201181d83791ad433213d8c24efffda1eec85d741"
|
||||
|
||||
[[package]]
|
||||
name = "semver"
|
||||
version = "1.0.20"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
|
||||
|
||||
[[package]]
|
||||
name = "serde"
|
||||
version = "1.0.193"
|
||||
|
|
@ -272,18 +349,18 @@ dependencies = [
|
|||
|
||||
[[package]]
|
||||
name = "thiserror"
|
||||
version = "1.0.50"
|
||||
version = "1.0.52"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
|
||||
checksum = "83a48fd946b02c0a526b2e9481c8e2a17755e47039164a86c4070446e3a4614d"
|
||||
dependencies = [
|
||||
"thiserror-impl",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror-impl"
|
||||
version = "1.0.50"
|
||||
version = "1.0.52"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
|
||||
checksum = "e7fbe9b594d6568a6a1443250a7e67d80b74e1e96f6d1715e1e21cc1888291d3"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
|
|
|
|||
|
|
@ -12,6 +12,7 @@ aoc-runner = "0.3.0"
|
|||
aoc-runner-derive = "0.3.0"
|
||||
aoc-parse = "0.2.17"
|
||||
num = "0.4"
|
||||
pathfinding = "4.8.0"
|
||||
|
||||
[profile.release]
|
||||
incremental = true
|
||||
|
|
|
|||
|
|
@ -0,0 +1,135 @@
|
|||
use aoc_runner_derive::{aoc, aoc_generator};
|
||||
use pathfinding::matrix::{directions, Matrix};
|
||||
use pathfinding::prelude::astar;
|
||||
|
||||
#[aoc_generator(day17)]
|
||||
fn parse(input: &str) -> Matrix<usize> {
|
||||
input
|
||||
.lines()
|
||||
.filter_map(|line| {
|
||||
if !line.is_empty() {
|
||||
Some(
|
||||
line.chars()
|
||||
.map(|c| c.to_digit(10).expect("bad digit") as usize),
|
||||
)
|
||||
} else {
|
||||
None
|
||||
}
|
||||
})
|
||||
.collect::<Matrix<usize>>()
|
||||
}
|
||||
|
||||
#[derive(Clone, Eq, Hash, PartialEq, Ord, PartialOrd)]
|
||||
struct Path {
|
||||
position: (usize, usize),
|
||||
dir: (isize, isize),
|
||||
steps: usize,
|
||||
}
|
||||
|
||||
fn distance(s: &(usize, usize), d: &(usize, usize)) -> usize {
|
||||
s.0.abs_diff(d.0) + s.1.abs_diff(d.1)
|
||||
}
|
||||
|
||||
fn find_path<const MIN: usize, const MAX: usize>(map: &Matrix<usize>) -> usize {
|
||||
let start = Path {
|
||||
position: (0, 0),
|
||||
dir: (0, 0),
|
||||
steps: 0,
|
||||
};
|
||||
let dest = (map.rows - 1, map.columns - 1);
|
||||
|
||||
let path = astar(
|
||||
&start,
|
||||
|cur| match cur.steps >= MIN || (cur.dir.0 == 0 && cur.dir.1 == 0) {
|
||||
true => find_successors::<MAX>(map, cur),
|
||||
false => continue_in_direction::<MIN>(map, cur),
|
||||
},
|
||||
|cur| distance(&dest, &cur.position),
|
||||
|cur| cur.position == dest && cur.steps >= MIN,
|
||||
)
|
||||
.expect("path is missing");
|
||||
path.1
|
||||
}
|
||||
|
||||
fn find_successors<const MAX: usize>(map: &Matrix<usize>, p: &Path) -> Vec<(Path, usize)> {
|
||||
[directions::N, directions::E, directions::S, directions::W]
|
||||
.iter()
|
||||
.flat_map(|dir| {
|
||||
map.move_in_direction(p.position, *dir)
|
||||
.map(|cur| (cur, *dir, *map.get(cur).unwrap()))
|
||||
})
|
||||
.filter(|(cur, dir, _weight)| {
|
||||
let backwards = p.dir.0 == -dir.0 && p.dir.1 == -dir.1;
|
||||
!backwards && *cur != (0, 0)
|
||||
})
|
||||
.flat_map(|(cur, dir, weight)| {
|
||||
let steps = match p.dir == dir {
|
||||
true => p.steps + 1,
|
||||
false => 1,
|
||||
};
|
||||
|
||||
match steps <= MAX {
|
||||
true => {
|
||||
let next = Path {
|
||||
position: cur,
|
||||
dir,
|
||||
steps,
|
||||
};
|
||||
Some((next, weight))
|
||||
}
|
||||
false => None,
|
||||
}
|
||||
})
|
||||
.collect::<Vec<_>>()
|
||||
}
|
||||
|
||||
fn continue_in_direction<const MIN: usize>(map: &Matrix<usize>, p: &Path) -> Vec<(Path, usize)> {
|
||||
match map.move_in_direction(p.position, p.dir) {
|
||||
Some(point) => {
|
||||
let heat = *map.get(point).unwrap();
|
||||
let new_path = Path {
|
||||
position: point,
|
||||
dir: p.dir,
|
||||
steps: p.steps + 1,
|
||||
};
|
||||
vec![(new_path, heat)]
|
||||
}
|
||||
None => Vec::with_capacity(0),
|
||||
}
|
||||
}
|
||||
|
||||
#[aoc(day17, part1)]
|
||||
fn part1(input: &Matrix<usize>) -> usize {
|
||||
find_path::<1, 3>(&input)
|
||||
}
|
||||
|
||||
#[aoc(day17, part2)]
|
||||
fn part2(input: &Matrix<usize>) -> usize {
|
||||
find_path::<4, 10>(&input)
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
const SAMPLE_DATA: &'static str = r#"2413432311323
|
||||
3215453535623
|
||||
3255245654254
|
||||
3446585845452
|
||||
4546657867536
|
||||
1438598798454
|
||||
4457876987766
|
||||
3637877979653
|
||||
4654967986887
|
||||
4564679986453
|
||||
1224686865563
|
||||
2546548887735
|
||||
4322674655533
|
||||
"#;
|
||||
|
||||
#[test]
|
||||
fn sample_data() {
|
||||
let input = parse(&SAMPLE_DATA);
|
||||
assert_eq!(part1(&input), 102);
|
||||
}
|
||||
}
|
||||
|
|
@ -16,5 +16,6 @@ mod day13;
|
|||
mod day14;
|
||||
mod day15;
|
||||
mod day16;
|
||||
mod day17;
|
||||
|
||||
aoc_lib! { year = 2023 }
|
||||
|
|
|
|||
Loading…
Reference in New Issue