day2_part1.jakt

/// Expect:
/// - output: "5000\n"

import reader
import utility

function main() {
    mut twice_count = 0
    mut thrice_count = 0

    for boxes in reader::lines_string(day: 2).iterator() {
        let ids = utility::string_to_char_array(boxes)
        mut letter_count: [u8:i64] = [:]

        mut current_twice_count = 0
        mut current_thrice_count = 0
        for id in ids.iterator() {
            if letter_count.contains(id) {
                letter_count[id]++

                if letter_count[id] == 2 {
                    current_twice_count++
                } else if letter_count[id] == 3 {
                    current_twice_count--
                    current_thrice_count++
                } else if letter_count[id] == 4 {
                    current_thrice_count--
                }
            } else {
                letter_count[id] = 1
            }
        }

        if current_twice_count > 0 {
            twice_count++
        }

        if current_thrice_count > 0 {
            thrice_count++
        }
    }

    println("{}", twice_count * thrice_count)
}