object Solution {

    def dec2bin(n: Int): String = {
        if (n / 2 == 0) return (n % 2).toString
        if (n % 2 == 0) return dec2bin(n/2) + "0"
        else return dec2bin(n/2) + "1"
    }

    def findConsecOnes(s: String): Int = {
        if (s.isEmpty) return 0
        if (s.head == '1') return findConsecOnes(s.tail) + 1
        if (s.head == '0') return findConsecOnes(s.tail) - 1
        return 0
    }

    def main(args: Array[String]) {
        val sc = new java.util.Scanner (System.in);
        var n = sc.nextInt();
        println(findConsecOnes(dec2bin(n)))
    }
}