fun main(args : Array<String>) {
    val (N, M) = readLine()!!.split(" ").map { it.toInt() }
    val timePerTry = 100 * (N-M) + 1900 * M


    var anser = 0.0
    val X = 1.0 / Math.pow(2.0, M.toDouble())
    (1..10000).forEach {
        anser += it * timePerTry * Math.pow((1.0-X), (it - 1).toDouble()) * X
    }
    println(Math.round(anser).toInt())
}