fun main() {
    // test if implementation meets criteria from the description, like:
    val testInput = readInput("../inputs/Day01_test")
    check(part1(testInput) == 24000)
    check(part2(testInput) == 45000)

    val input = readInput("../inputs/Day01")
    println(part1(input))
    println(part2(input))
}
fun groupElves(input: List<String>): MutableList<Int> {
    var currentElf: Int = 0
    val elves = mutableListOf<Int>()

    for(line in input)
    {
        if(line.isNotEmpty())
        {
            currentElf += line.toInt()
        }else
        {
            elves.add(currentElf)
            currentElf = 0
        }
    }
    elves.add(currentElf)
    return elves
}

private fun part1(input: List<String>): Int {
    val elves = groupElves(input)

    return elves.max()
}

private fun part2(input: List<String>): Int {
    val elves = groupElves(input)

    elves.sort()
    elves.reverse()

    return elves.take(3).sum()
}