private val part1Scores =
    mapOf(
        "A X" to 1 + 3,
        "A Y" to 2 + 6,
        "A Z" to 3 + 0,
        "B X" to 1 + 0,
        "B Y" to 2 + 3,
        "B Z" to 3 + 6,
        "C X" to 1 + 6,
        "C Y" to 2 + 0,
        "C Z" to 3 + 3,
    )

private val part2Scores =
    mapOf(
        "A X" to 3 + 0,
        "A Y" to 1 + 3,
        "A Z" to 2 + 6,
        "B X" to 1 + 0,
        "B Y" to 2 + 3,
        "B Z" to 3 + 6,
        "C X" to 2 + 0,
        "C Y" to 3 + 3,
        "C Z" to 1 + 6,
    )

fun main() {
    fun part1(input: List<String>): Int =
        input.sumOf { part1Scores[it] ?: 0 }

    fun part2(input: List<String>): Int =
        input.sumOf { part2Scores[it] ?: 0 }

    // test if implementation meets criteria from the description, like:
    val testInput = readInput("Day02_test")
    check(part1(testInput) == 15)
    check(part2(testInput) == 12)

    val input = readInput("Day02")
    println(part1(input))
    println(part2(input))
}