use aoc22::day3;
use aoc22::util;

pub fn main() {
    let rucksacks = day3::parse_rucksacks(&util::parse_input());

    let mut sum = 0;
    for group in rucksacks.chunks_exact(3) {
        // Intersection of the unions of each rucksack's compartments
        let common = &(&(&group[0].0 | &group[0].1) & &(&group[1].0 | &group[1].1))
            & &(&group[2].0 | &group[2].1);
        assert!(common.len() == 1);
        sum += day3::priority(*common.iter().next().unwrap());
    }

    println!("Sum of priorities is {}", sum);
}