object Main extends App {

  val sc = new java.util.Scanner(System.in)

  while(sc.hasNext()) {

    val nextBytes = sc.nextInt()
    val binaryString = nextBytes.toBinaryString

    var count = 0

    binaryString.split("").map(x=> if (x =="1") count +=1 )

    println(count)

  }
}