object Main{
  def main(args: Array[String]){
    val input=io.Source.stdin.getLines().mkString("\n")
    println(solve(input).trim())
  }

  def solve(input:String):String={
    val Array(n,m)=input.split(" ").map(_.toInt)
    ( ( (n-m)*100 + m*1900 ) * List.fill(m)(2).product ).toString
  }
}
