Day 2: Cube Conundrum


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  • Ategon@programming.devOPM
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    11 months ago

    Rust (Rank 7421/6311) (Time after start 00:32:27/00:35:35)

    Extremely easy part 2 today, I would say easier than part 1 but they share the same sort of framework

    Code Block

    (Note lemmy removed some characters, code link shows them all)

    use std::fs;
    
    fn part1(input: String) -> i32 {
        const RED: i32 = 12;
        const GREEN: i32 = 13;
        const BLUE: i32 = 14;
    
        let mut sum = 0;
    
        for line in input.lines() {
            let [id, content] = line.split(": ").collect::>()[0..2] else { continue };
            let id = id.split(" ").collect::>()[1].parse::().unwrap();
    
            let marbles = content.split("; ").map(|x| { x.split(", ").collect::>() }).collect::>>();
            let mut valid = true;
    
            for selection in marbles {
                for marble in selection {
                    let marble_split = marble.split(" ").collect::>();
                    let marble_amount = marble_split[0].parse::().unwrap();
                    let marble_color = marble_split[1];
    
                    if marble_color == "red" && marble_amount > RED {
                        valid = false;
                        break;
                    }
    
                    if marble_color == "green" && marble_amount > GREEN {
                        valid = false;
                        break;
                    }
    
                    if marble_color == "blue" && marble_amount > BLUE {
                        valid = false;
                        break;
                    }
                }
            }
    
            if !valid {
                continue;
            }
    
            sum += id;
        }
    
        return sum;
    }
    
    fn part2(input: String) -> i32 {
        let mut sum = 0;
    
        for line in input.lines() {
            let [id, content] = line.split(": ").collect::>()[0..2] else { continue };
            let id = id.split(" ").collect::>()[1].parse::().unwrap();
    
            let marbles = content.split("; ").map(|x| { x.split(", ").collect::>() }).collect::>>();
            
            let mut red = 0;
            let mut green = 0;
            let mut blue = 0;
    
            for selection in marbles {
                for marble in selection {
                    let marble_split = marble.split(" ").collect::>();
                    let marble_amount = marble_split[0].parse::().unwrap();
                    let marble_color = marble_split[1];
    
                    if marble_color == "red" && marble_amount > red {
                        red = marble_amount;
                    }
    
                    if marble_color == "green" && marble_amount > green {
                        green = marble_amount;
                    }
    
                    if marble_color == "blue" && marble_amount > blue {
                        blue = marble_amount;
                    }
                }
            }
    
            sum += red * green * blue;
        }
    
        return sum;
    }
    
    fn main() {
        let input = fs::read_to_string("data/input.txt").unwrap();
    
        println!("{}", part1(input.clone()));
        println!("{}", part2(input.clone()));
    }
    

    Code Link