commit 0194f0b016b78a4a6754f91ba6bb817143720428 · aylac.top/advent_of_code

+54 -18

2015/19/rust/src/main.rs

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       struct Combination {

     

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           original: String,

     

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           target: String,

     

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       }

     

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       fn main() {

     

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           let input: String = std::fs::read_to_string("../input.txt").expect("invalid input!!");

     

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           let input: Vec<&str> = input.split("\n").collect();

     

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           let combinations: Vec<Combination> = &input[..input.len() - 2].iter().map(|v| {

     

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               let v: Vec<&str> = v.split(" ").collect();

     

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               match v[..] {

     

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                   [original, _, target] => Combination {

     

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                       original: original.to_string(),

     

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                       target: target.to_string(),

     

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                   },

     

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                   _ => Combination {

     

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                       original: "".to_string(),

     

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                       target: "".to_string(),

     

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                   },

     

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               }

     

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           }).

     

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       }

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       use std::collections::{HashMap, HashSet};

     

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       fn main() {

     

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           let input = include_str!("../../input.txt");

     

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           let input: Vec<&str> = input.trim().split("\n").collect();

     

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           let combinations: HashMap<String, Vec<String>> = {

     

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               let mut combinations = HashMap::new();

     

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               input[..input.len() - 2].iter().for_each(|v| {

     

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                   let v: Vec<&str> = v.split(" ").collect();

     

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                   match v[..] {

     

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                       [original, "=>", target] => {

     

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                           let entry = combinations

     

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                               .entry(original.to_string())

     

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                               .or_insert(Vec::with_capacity(1));

     

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                           entry.push(target.to_string());

     

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                       }

     

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                       _ => panic!("{:?}", v),

     

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                   }

     

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               });

     

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               combinations

     

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           };

     

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           let medicine_mol: Vec<String> = {

     

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               let mut mol = Vec::new();

     

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               input.last().unwrap().chars().for_each(|letter| {

     

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                   if letter.is_lowercase() {

     

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                       mol.push(format!("{}{}", mol.last().unwrap(), letter));

     

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                   } else {

     

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                       mol.push(format!("{}", letter))

     

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                   }

     

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               });

     

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               mol

     

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           };

     

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           println!("{:?}", medicine_mol);

     

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           // part 1

     

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           {

     

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               let mol_len = medicine_mol.len();

     

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               let mut possibilities: HashSet<String> = HashSet::new();

     

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               for (k, element) in medicine_mol.iter().enumerate() {

     

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                   let of_element = combinations.get(element);

     

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                   match of_element {

     

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                       Some(of_element) => of_element.iter().for_each(|new_element| {

     

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                           possibilities.insert(format!(

     

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                               "{}{}{}",

     

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                               medicine_mol[0..k].join(""),

     

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                               new_element,

     

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                               medicine_mol[k + 1..mol_len].join("")

     

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                           ));

     

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                       }),

     

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                       _ => {}

     

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                   }

     

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               }

     

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               println!("Part 1: {}", possibilities.len())

     

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           }

     

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       }

+1 -1

template/rust/src/main.rs

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       fn main() {

     

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           let input = include_str!("../../input.txt");

     

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           println!("{}", &input);

     

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       }

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       fn main() {

     

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           let input = include_str!("../../input.txt").trim();

     

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           println!("{}", &input);

     

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       }