adventofcode/days/2024/19.rs

use advent_of_code::strings::convert_to_array;
use advent_of_code_macros::include_aoc;

include_aoc!(2024, 19);

fn test_pattern(pattern: String, parts: Vec<String>) -> bool {
    false
}

fn main() {
    let (patterndata, designdata) = DATA.split_once("\n\n").unwrap();
    let mut designs = convert_to_array::<_, _, '\n'>(designdata, str::to_string);
    let patterns = convert_to_array::<_, _, ','>(patterndata, str::to_string);
    designs.sort();
    let mut possible = 0;
    for design in designs {
        let mut candidates = vec![design];
        'designloop: loop {
            let mut new = Vec::with_capacity(candidates.len());
            for possibility in candidates {
                for part in patterns.clone() {
                    if possibility.starts_with(part.as_str()) {
                        if possibility.len() == part.len() {
                            println!("Found design");
                            possible += 1;
                            break 'designloop;
                        }
                        new.push(possibility[part.len()..].to_owned());
                    }
                }
            }
            new.sort();
            new.dedup();
            candidates = new;
            if candidates.len() == 0 {
                break;
            }
        }
    }
    println!("There are {} possible designs", possible);
}

#[cfg(test)]
mod test {
    use super::*;
}