This commit is contained in:
Andrew Glaze 2023-12-27 12:28:30 -05:00
parent 14c6da72d9
commit 2c4288de42
4 changed files with 184 additions and 2 deletions

62
Cargo.lock generated
View File

@ -12,6 +12,7 @@ dependencies = [
"itertools", "itertools",
"num", "num",
"prev-iter", "prev-iter",
"rand 0.8.5",
"regex", "regex",
"rust-crypto", "rust-crypto",
"strum", "strum",
@ -68,6 +69,12 @@ version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa" checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]] [[package]]
name = "either" name = "either"
version = "1.9.0" version = "1.9.0"
@ -86,6 +93,17 @@ version = "0.3.55"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2" checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
[[package]]
name = "getrandom"
version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fe9006bed769170c11f845cf00c7c1e9092aeb3f268e007c3e760ac68008070f"
dependencies = [
"cfg-if",
"libc",
"wasi 0.11.0+wasi-snapshot-preview1",
]
[[package]] [[package]]
name = "heck" name = "heck"
version = "0.4.1" version = "0.4.1"
@ -195,6 +213,12 @@ dependencies = [
"autocfg", "autocfg",
] ]
[[package]]
name = "ppv-lite86"
version = "0.2.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
[[package]] [[package]]
name = "prev-iter" name = "prev-iter"
version = "0.1.2" version = "0.1.2"
@ -242,6 +266,27 @@ dependencies = [
"winapi", "winapi",
] ]
[[package]]
name = "rand"
version = "0.8.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
dependencies = [
"libc",
"rand_chacha",
"rand_core 0.6.4",
]
[[package]]
name = "rand_chacha"
version = "0.3.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
dependencies = [
"ppv-lite86",
"rand_core 0.6.4",
]
[[package]] [[package]]
name = "rand_core" name = "rand_core"
version = "0.3.1" version = "0.3.1"
@ -257,6 +302,15 @@ version = "0.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc" checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
[[package]]
name = "rand_core"
version = "0.6.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
dependencies = [
"getrandom",
]
[[package]] [[package]]
name = "rdrand" name = "rdrand"
version = "0.4.0" version = "0.4.0"
@ -405,7 +459,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a" checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
dependencies = [ dependencies = [
"libc", "libc",
"wasi", "wasi 0.10.0+wasi-snapshot-preview1",
"winapi", "winapi",
] ]
@ -421,6 +475,12 @@ version = "0.10.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f" checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
[[package]]
name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]] [[package]]
name = "winapi" name = "winapi"
version = "0.3.9" version = "0.3.9"

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@ -16,4 +16,5 @@ strum = "0.25.0"
strum_macros = "0.25" strum_macros = "0.25"
prev-iter = "0.1.2" prev-iter = "0.1.2"
regex = "1.10.2" regex = "1.10.2"
num = "0.4.1" num = "0.4.1"
rand = "0.8.5"

120
src/day25.rs Normal file
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@ -0,0 +1,120 @@
use std::collections::{HashSet, HashMap};
use rand::Rng;
use aoc_runner_derive::{aoc, aoc_generator};
#[derive(Debug, Clone)]
struct Graph {
edges: Vec<(String, String)>,
vertex_count: usize
}
impl Graph {
fn cut(&mut self) -> (usize, usize, usize) {
let mut contracted_edges = self.edges.clone();
let mut contracted_vertex_count = self.vertex_count;
let mut contracted: HashMap<String, Vec<String>> = HashMap::new();
//for _ in 0..contracted_vertex_count {
while contracted_vertex_count > 2 {
let random = rand::thread_rng().gen_range(0..contracted_edges.len());
let edge_to_contract = contracted_edges[random].clone();
if contracted.contains_key(&edge_to_contract.0) {
contracted.get_mut(&edge_to_contract.0.clone()).unwrap().push(edge_to_contract.1.clone());
} else {
contracted.insert(edge_to_contract.0.clone(), vec![edge_to_contract.1.clone()]);
}
if contracted.contains_key(&edge_to_contract.1) {
let mut to_append = contracted.clone().get_mut(&edge_to_contract.1).unwrap().clone();
contracted.get_mut(&edge_to_contract.0).unwrap().append(&mut to_append);
contracted.remove(&edge_to_contract.1);
}
let mut new_edges: Vec<(String, String)> = vec![];
for edge in contracted_edges {
if edge.1 == edge_to_contract.1 {
new_edges.push((edge.0.clone(), edge_to_contract.0.clone()));
} else if edge.0 == edge_to_contract.1 {
new_edges.push((edge_to_contract.0.clone(), edge.1.clone()));
} else {
new_edges.push(edge.clone());
}
}
let tmp = new_edges.iter().cloned().filter(|x| x.0 != x.1).collect::<Vec<_>>();
contracted_edges = tmp;
contracted_vertex_count -= 1;
}
let counts = contracted.iter().map(|x| x.1.len() + 1).collect::<Vec<_>>();
return (contracted_edges.len(), counts[0], *counts.last().unwrap());
}
}
#[aoc_generator(day25)]
fn parse(input: &str) -> Graph {
let input = input.lines().flat_map(|line| {
let line = line.split(' ').map(|x| x.trim_end_matches(':').to_string()).collect::<Vec<_>>();
line[1..].iter().cloned().map(|x| (line[0].clone(), x)).collect::<Vec<_>>()
}).collect::<Vec<_>>();
let vertex_count = input.clone().into_iter().flat_map(|x| vec![x.0, x.1]).collect::<HashSet<_>>().len();
Graph {
edges: input,
vertex_count
}
}
#[aoc(day25, part1)]
fn part1(graph: &Graph) -> usize {
let graph = &mut graph.clone();
let mut min_cut = usize::MAX;
let mut count1 = 0;
let mut count2 = 0;
while min_cut != 3 {
(min_cut, count1, count2) = graph.cut();
}
count1 * count2
}
// #[aoc(day25, part2)]
// fn part2(input: &str) -> String {
// todo!()
// }
#[cfg(test)]
mod tests {
use super::*;
const EX: &str = r"jqt: rhn xhk nvd
rsh: frs pzl lsr
xhk: hfx
cmg: qnr nvd lhk bvb
rhn: xhk bvb hfx
bvb: xhk hfx
pzl: lsr hfx nvd
qnr: nvd
ntq: jqt hfx bvb xhk
nvd: lhk
lsr: lhk
rzs: qnr cmg lsr rsh
frs: qnr lhk lsr";
#[test]
fn part1_example() {
assert_eq!(part1(&parse(EX)), 54);
}
// #[test]
// fn part2_example() {
// assert_eq!(part2(&parse("<EXAMPLE>")), "<RESULT>");
// }
}

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@ -1,3 +1,4 @@
mod day25;
mod day24; mod day24;
mod day23; mod day23;
mod day22; mod day22;