import scala.io.StdIn

object Problem175 {

  def proc(L: Int, N: Int): Int = {
    Math.pow(2, L - 3).toInt * N
  }

  def main(args: Array[String]) {
    val L = StdIn.readInt()
    val N = StdIn.readInt()
    val S = StdIn.readLine()

    val result: Int = proc(L, N)
    println(result)
  }
}