Added day 16
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106
src/day16/1.rs
106
src/day16/1.rs
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#![feature(test)]
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use std::collections::HashMap;
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extern crate test;
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const INPUTS: [&str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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#[derive(Clone, Debug, Ord, PartialEq, PartialOrd, Eq)]
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struct Node {
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flow: i32,
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idx: usize,
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leads_to: Vec<String>,
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}
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fn parse(input: &'static str) -> HashMap<String, Node> {
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input
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.lines()
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.enumerate()
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.map(|(i, line)| {
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let mut num = 0;
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let mut node = "".to_string();
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let mut children = vec![];
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for c in line.chars().skip(1).filter(|&c| {
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('A'..='Z').contains(&c) || ('0'..='9').contains(&c) || c == ',' || c == '='
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}) {
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match c {
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'A'..='Z' => {
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node.push(c);
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}
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'0'..='9' => num = num * 10 + (c as u8 - b'0') as i32,
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'=' | ',' => {
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children.push(node.clone());
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node.clear();
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}
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_ => (),
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}
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}
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children.push(node);
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(
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children[0].clone(),
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Node {
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flow: num,
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idx: i,
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leads_to: children[1..].to_vec(),
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},
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)
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})
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.collect()
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}
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const MAX_TIME: i32 = 30;
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fn solution(input: HashMap<String, Node>) -> i32 {
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let mut choices = HashMap::with_capacity(50);
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choices.insert((0, "AA".to_string()), (0, 0, 0u128));
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for minute in 0..MAX_TIME {
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let mut new_choices = HashMap::with_capacity(50);
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for (k, choice) in choices {
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let new_valve = &k.1;
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let ip = input.get(new_valve).unwrap();
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let new_valve_idx = ip.idx;
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let new_time = choice.0 + 1;
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let mut new_release = choice.1;
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for path in ip.leads_to.iter() {
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let new_choice = (new_time, new_release, choice.2);
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new_choices.insert((new_release, path.to_string()), new_choice);
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}
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if ip.flow > 0 && choice.2 & (1 << new_valve_idx) < 1 {
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new_release += ip.flow * (MAX_TIME - minute - 1);
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let new_choice = (new_time, new_release, choice.2 | (1 << new_valve_idx));
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new_choices.insert((new_release, new_valve.to_string()), new_choice);
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}
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}
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choices = new_choices;
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}
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choices.values().map(|c| c.1).max().unwrap()
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}
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fn main() {
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for input in INPUTS.iter() {
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let output = parse(input);
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let score = solution(output);
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println!("{}", score);
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}
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}
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#[bench]
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fn solution_bench(b: &mut test::Bencher) {
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b.iter(|| {
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let input = parse(INPUTS[1]);
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let result = solution(input);
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test::black_box(result);
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})
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}
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142
src/day16/2.rs
142
src/day16/2.rs
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#![feature(test)]
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use std::{cmp::Ordering, collections::HashMap};
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extern crate test;
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const INPUTS: [&str; 2] = [include_str!("./sample.txt"), include_str!("./input.txt")];
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#[derive(Clone, Debug, Ord, PartialEq, PartialOrd, Eq)]
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struct Node {
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flow: i32,
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idx: usize,
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leads_to: Vec<String>,
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}
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fn parse(input: &'static str) -> HashMap<String, Node> {
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input
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.lines()
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.enumerate()
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.map(|(i, line)| {
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let mut num = 0;
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let mut node = "".to_string();
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let mut children = vec![];
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for c in line.chars().skip(1).filter(|&c| {
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('A'..='Z').contains(&c)
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|| ('0'..='9').contains(&c)
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|| c == ','
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|| c == ';'
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|| c == '='
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}) {
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match c {
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'A'..='Z' => node.push(c),
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'0'..='9' => num = num * 10 + (c as u8 - b'0') as i32,
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'=' | ',' => {
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children.push(node.clone());
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node.clear();
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}
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_ => (),
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}
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}
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children.push(node);
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(
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children[0].clone(),
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Node {
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flow: num,
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idx: i,
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leads_to: children[1..].to_vec(),
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},
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)
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})
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.collect()
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}
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const MAX_TIME: i32 = 26;
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fn solution(input: HashMap<String, Node>) -> i32 {
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let mut new_choices = HashMap::with_capacity(500);
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let mut choices = HashMap::with_capacity(500);
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choices.insert((0, "AA".to_string(), "AA".to_string()), (0, 0u128));
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'outer: for minute in 0..MAX_TIME {
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for (k, choice) in &choices {
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let mut hpaths = input.get(&k.1).unwrap().leads_to.clone();
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hpaths.push(k.1.clone());
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let mut epaths = input.get(&k.2).unwrap().leads_to.clone();
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epaths.push(k.2.clone());
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if choice.1.count_ones() == input.len() as u32 {
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break 'outer;
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}
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for h in hpaths {
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let epaths = epaths.clone();
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for e in epaths {
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let new_h_valve = h.clone();
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let new_h_valve_flow = input.get(&new_h_valve).unwrap().flow;
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let new_h_valve_idx = input.get(&new_h_valve).unwrap().idx;
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let mut new_release = choice.0;
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let new_e_valve = e;
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let new_e_valve_flow = input.get(&new_e_valve).unwrap().flow;
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let new_e_valve_idx = input.get(&new_e_valve).unwrap().idx;
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let mut new_state = choice.1;
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match (new_e_valve.cmp(&k.2), new_h_valve.cmp(&k.1)) {
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(Ordering::Equal, Ordering::Equal) => {
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if (new_state & (1 << new_h_valve_idx) < 1)
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&& (new_state & (1 << new_e_valve_idx) < 1)
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{
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new_release += new_h_valve_flow * (MAX_TIME - minute - 1);
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new_state |= 1 << new_h_valve_idx;
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if new_state & (1 << new_e_valve_idx) < 1 {
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new_release += new_e_valve_flow * (MAX_TIME - minute - 1);
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new_state |= 1 << new_e_valve_idx;
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}
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}
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}
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(_, Ordering::Equal) if new_state & (1 << new_h_valve_idx) < 1 => {
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new_release += new_h_valve_flow * (MAX_TIME - minute - 1);
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new_state |= 1 << new_h_valve_idx;
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}
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(Ordering::Equal, _) if new_state & (1 << new_e_valve_idx) < 1 => {
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new_release += new_e_valve_flow * (MAX_TIME - minute - 1);
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new_state |= 1 << new_e_valve_idx;
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}
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(_, _) => (),
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}
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let new_choice = (new_release, new_state);
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new_choices.insert((new_release, new_h_valve, new_e_valve), new_choice);
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}
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}
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}
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std::mem::swap(&mut choices, &mut new_choices);
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new_choices.clear();
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}
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choices.values().map(|c| c.0).max().unwrap()
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}
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fn main() {
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for input in INPUTS.iter() {
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let output = parse(input);
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let score = solution(output);
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println!("{}", score);
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}
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}
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#[bench]
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fn solution_bench(b: &mut test::Bencher) {
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b.iter(|| {
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let input = parse(INPUTS[1]);
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let result = solution(input);
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test::black_box(result);
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})
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}
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@ -0,0 +1,51 @@
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Valve GS has flow rate=0; tunnels lead to valves KB, GW
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Valve CB has flow rate=0; tunnels lead to valves GW, CT
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Valve TP has flow rate=0; tunnels lead to valves LR, TH
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Valve FI has flow rate=3; tunnels lead to valves DA, AY, ZO, MP, XP
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Valve WV has flow rate=0; tunnels lead to valves TH, HG
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Valve EA has flow rate=16; tunnels lead to valves PL, NG, AX
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Valve AT has flow rate=9; tunnels lead to valves ZO, EM
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Valve WS has flow rate=0; tunnels lead to valves GW, RD
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Valve MP has flow rate=0; tunnels lead to valves AA, FI
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Valve GE has flow rate=0; tunnels lead to valves AX, QN
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Valve SA has flow rate=10; tunnels lead to valves NI, OM, RD, RC, GO
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Valve NI has flow rate=0; tunnels lead to valves SA, YG
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Valve GO has flow rate=0; tunnels lead to valves TH, SA
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Valve IT has flow rate=0; tunnels lead to valves WB, KB
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Valve NG has flow rate=0; tunnels lead to valves EA, KF
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Valve RD has flow rate=0; tunnels lead to valves SA, WS
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Valve LR has flow rate=12; tunnels lead to valves TP, XR
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Valve TO has flow rate=22; tunnel leads to valve VW
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Valve WF has flow rate=0; tunnels lead to valves XX, OO
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Valve YD has flow rate=21; tunnel leads to valve NR
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Valve XR has flow rate=0; tunnels lead to valves LR, KB
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Valve KF has flow rate=0; tunnels lead to valves GW, NG
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Valve OO has flow rate=0; tunnels lead to valves UD, WF
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Valve HG has flow rate=0; tunnels lead to valves WV, YG
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Valve CT has flow rate=0; tunnels lead to valves YG, CB
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Valve DA has flow rate=0; tunnels lead to valves TH, FI
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Valve YY has flow rate=0; tunnels lead to valves AA, YG
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Valve VW has flow rate=0; tunnels lead to valves TO, EM
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Valve RC has flow rate=0; tunnels lead to valves AA, SA
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Valve PL has flow rate=0; tunnels lead to valves AA, EA
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Valve TH has flow rate=14; tunnels lead to valves GO, WV, GJ, DA, TP
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Valve QN has flow rate=24; tunnels lead to valves LC, GE
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Valve XE has flow rate=0; tunnels lead to valves NA, XX
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Valve XP has flow rate=0; tunnels lead to valves FI, OM
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Valve AX has flow rate=0; tunnels lead to valves GE, EA
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Valve EM has flow rate=0; tunnels lead to valves AT, VW
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Valve NR has flow rate=0; tunnels lead to valves YD, PM
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Valve YG has flow rate=4; tunnels lead to valves AY, HG, NI, YY, CT
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Valve PM has flow rate=0; tunnels lead to valves UD, NR
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Valve AY has flow rate=0; tunnels lead to valves YG, FI
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Valve GJ has flow rate=0; tunnels lead to valves AA, TH
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Valve LC has flow rate=0; tunnels lead to valves QN, GW
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Valve UD has flow rate=17; tunnels lead to valves OO, PM
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Valve AA has flow rate=0; tunnels lead to valves MP, GJ, YY, RC, PL
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Valve OM has flow rate=0; tunnels lead to valves XP, SA
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Valve WB has flow rate=0; tunnels lead to valves NA, IT
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Valve GW has flow rate=11; tunnels lead to valves KF, GS, LC, CB, WS
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Valve NA has flow rate=7; tunnels lead to valves WB, XE
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Valve XX has flow rate=20; tunnels lead to valves XE, WF
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Valve ZO has flow rate=0; tunnels lead to valves AT, FI
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Valve KB has flow rate=8; tunnels lead to valves XR, GS, IT
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@ -0,0 +1,10 @@
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Valve AA has flow rate=0; tunnels lead to valves DD, II, BB
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Valve BB has flow rate=13; tunnels lead to valves CC, AA
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Valve CC has flow rate=2; tunnels lead to valves DD, BB
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Valve DD has flow rate=20; tunnels lead to valves CC, AA, EE
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Valve EE has flow rate=3; tunnels lead to valves FF, DD
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Valve FF has flow rate=0; tunnels lead to valves EE, GG
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Valve GG has flow rate=0; tunnels lead to valves FF, HH
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Valve HH has flow rate=22; tunnel leads to valve GG
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Valve II has flow rate=0; tunnels lead to valves AA, JJ
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Valve JJ has flow rate=21; tunnel leads to valve II
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