object Day2 : AdventOfCode({
    val parsed = input
        .split(",")
        .map { it.split("-").let { (a,b) -> a.toLong()..b.toLong() } }

    fun String.repeats(size: Int): Boolean = when{
        size > length / 2 -> false
        chunked(size).distinct().size == 1 -> true
        else -> repeats(size + 1)
    }

    fun solve(firstElement: (String) -> Int) = parsed.flatMap { range ->
        range.filter { number ->
            number.toString().let { candidate ->
                candidate.repeats(firstElement(candidate))
            }
        }
    }.sum()

    part1{
        solve { (it.length + 1) / 2 }
    }

    part2{
        solve { 1 }
    }
})