day25
This commit is contained in:
parent
14c6da72d9
commit
2c4288de42
62
Cargo.lock
generated
62
Cargo.lock
generated
@ -12,6 +12,7 @@ dependencies = [
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"itertools",
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"num",
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"prev-iter",
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"rand 0.8.5",
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"regex",
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"rust-crypto",
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"strum",
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@ -68,6 +69,12 @@ version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
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[[package]]
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name = "cfg-if"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
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[[package]]
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name = "either"
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version = "1.9.0"
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@ -86,6 +93,17 @@ version = "0.3.55"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
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[[package]]
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name = "getrandom"
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version = "0.2.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fe9006bed769170c11f845cf00c7c1e9092aeb3f268e007c3e760ac68008070f"
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dependencies = [
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"cfg-if",
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"libc",
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"wasi 0.11.0+wasi-snapshot-preview1",
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]
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[[package]]
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name = "heck"
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version = "0.4.1"
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@ -195,6 +213,12 @@ dependencies = [
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"autocfg",
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]
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[[package]]
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name = "ppv-lite86"
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version = "0.2.17"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
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[[package]]
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name = "prev-iter"
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version = "0.1.2"
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@ -242,6 +266,27 @@ dependencies = [
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"winapi",
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]
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[[package]]
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name = "rand"
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version = "0.8.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
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dependencies = [
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"libc",
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"rand_chacha",
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"rand_core 0.6.4",
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]
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[[package]]
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name = "rand_chacha"
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version = "0.3.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
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dependencies = [
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"ppv-lite86",
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"rand_core 0.6.4",
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]
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[[package]]
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name = "rand_core"
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version = "0.3.1"
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@ -257,6 +302,15 @@ version = "0.4.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
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[[package]]
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name = "rand_core"
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version = "0.6.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
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dependencies = [
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"getrandom",
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]
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[[package]]
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name = "rdrand"
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version = "0.4.0"
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@ -405,7 +459,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
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dependencies = [
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"libc",
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"wasi",
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"wasi 0.10.0+wasi-snapshot-preview1",
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"winapi",
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]
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@ -421,6 +475,12 @@ version = "0.10.0+wasi-snapshot-preview1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
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[[package]]
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name = "wasi"
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version = "0.11.0+wasi-snapshot-preview1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
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[[package]]
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name = "winapi"
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version = "0.3.9"
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@ -17,3 +17,4 @@ strum_macros = "0.25"
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prev-iter = "0.1.2"
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regex = "1.10.2"
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num = "0.4.1"
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rand = "0.8.5"
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120
src/day25.rs
Normal file
120
src/day25.rs
Normal file
@ -0,0 +1,120 @@
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use std::collections::{HashSet, HashMap};
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use rand::Rng;
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use aoc_runner_derive::{aoc, aoc_generator};
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#[derive(Debug, Clone)]
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struct Graph {
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edges: Vec<(String, String)>,
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vertex_count: usize
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}
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impl Graph {
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fn cut(&mut self) -> (usize, usize, usize) {
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let mut contracted_edges = self.edges.clone();
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let mut contracted_vertex_count = self.vertex_count;
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let mut contracted: HashMap<String, Vec<String>> = HashMap::new();
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//for _ in 0..contracted_vertex_count {
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while contracted_vertex_count > 2 {
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let random = rand::thread_rng().gen_range(0..contracted_edges.len());
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let edge_to_contract = contracted_edges[random].clone();
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if contracted.contains_key(&edge_to_contract.0) {
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contracted.get_mut(&edge_to_contract.0.clone()).unwrap().push(edge_to_contract.1.clone());
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} else {
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contracted.insert(edge_to_contract.0.clone(), vec![edge_to_contract.1.clone()]);
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}
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if contracted.contains_key(&edge_to_contract.1) {
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let mut to_append = contracted.clone().get_mut(&edge_to_contract.1).unwrap().clone();
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contracted.get_mut(&edge_to_contract.0).unwrap().append(&mut to_append);
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contracted.remove(&edge_to_contract.1);
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}
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let mut new_edges: Vec<(String, String)> = vec![];
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for edge in contracted_edges {
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if edge.1 == edge_to_contract.1 {
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new_edges.push((edge.0.clone(), edge_to_contract.0.clone()));
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} else if edge.0 == edge_to_contract.1 {
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new_edges.push((edge_to_contract.0.clone(), edge.1.clone()));
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} else {
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new_edges.push(edge.clone());
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}
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}
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let tmp = new_edges.iter().cloned().filter(|x| x.0 != x.1).collect::<Vec<_>>();
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contracted_edges = tmp;
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contracted_vertex_count -= 1;
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}
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let counts = contracted.iter().map(|x| x.1.len() + 1).collect::<Vec<_>>();
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return (contracted_edges.len(), counts[0], *counts.last().unwrap());
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}
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}
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#[aoc_generator(day25)]
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fn parse(input: &str) -> Graph {
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let input = input.lines().flat_map(|line| {
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let line = line.split(' ').map(|x| x.trim_end_matches(':').to_string()).collect::<Vec<_>>();
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line[1..].iter().cloned().map(|x| (line[0].clone(), x)).collect::<Vec<_>>()
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}).collect::<Vec<_>>();
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let vertex_count = input.clone().into_iter().flat_map(|x| vec![x.0, x.1]).collect::<HashSet<_>>().len();
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Graph {
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edges: input,
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vertex_count
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}
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}
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#[aoc(day25, part1)]
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fn part1(graph: &Graph) -> usize {
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let graph = &mut graph.clone();
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let mut min_cut = usize::MAX;
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let mut count1 = 0;
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let mut count2 = 0;
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while min_cut != 3 {
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(min_cut, count1, count2) = graph.cut();
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}
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count1 * count2
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}
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// #[aoc(day25, part2)]
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// fn part2(input: &str) -> String {
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// todo!()
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// }
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#[cfg(test)]
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mod tests {
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use super::*;
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const EX: &str = r"jqt: rhn xhk nvd
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rsh: frs pzl lsr
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xhk: hfx
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cmg: qnr nvd lhk bvb
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rhn: xhk bvb hfx
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bvb: xhk hfx
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pzl: lsr hfx nvd
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qnr: nvd
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ntq: jqt hfx bvb xhk
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nvd: lhk
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lsr: lhk
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rzs: qnr cmg lsr rsh
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frs: qnr lhk lsr";
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#[test]
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fn part1_example() {
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assert_eq!(part1(&parse(EX)), 54);
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}
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// #[test]
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// fn part2_example() {
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// assert_eq!(part2(&parse("<EXAMPLE>")), "<RESULT>");
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// }
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}
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@ -1,3 +1,4 @@
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mod day25;
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mod day24;
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mod day23;
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mod day22;
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