fn main() {
    let input = lib::read_input(2);

    part1(&input);
    part2(&input);
}

fn part1(input: &str) {
    let mut score = 0;

    for line in input.split("\n") {
        let mut split = line.split(" ").flat_map(|s| s.chars().next());
        let Some(opp) = split.next() else { continue };
        let me = split.next().unwrap();

        let outcome_score = match (opp, me) {
            ('A', 'Z') | ('B', 'X') | ('C', 'Y') => 0,
            ('A', 'X') | ('B', 'Y') | ('C', 'Z') => 3,
            ('A', 'Y') | ('B', 'Z') | ('C', 'X') => 6,
            _ => unreachable!(),
        };

        let choice_score = match me {
            'X' => 1,
            'Y' => 2,
            'Z' => 3,
            _ => unreachable!(),
        };

        score += outcome_score + choice_score;
    }

    println!("{}", score);
}

fn part2(input: &str) {
    let mut score = 0;

    for line in input.split("\n") {
        let mut split = line.split(" ").flat_map(|s| s.chars().next());
        let Some(opp) = split.next() else { continue };
        let outcome = split.next().unwrap();

        let opp = match opp {
            'A' => 0,
            'B' => 1,
            'C' => 2,
            _ => unreachable!(),
        };

        let (me, outcome_score) = match outcome {
            'X' => ((opp - 1 + 3) % 3, 0),
            'Y' => (opp, 3),
            'Z' => ((opp + 1 + 3) % 3, 6),
            _ => unreachable!(),
        };

        let choice_score = me + 1;

        score += outcome_score + choice_score;
    }

    println!("{}", score);
}