# include <iostream>

 # include <cstdio>

 # include <cstring>

 # include <algorithm>

 # include <string>

 # include <cmath>

 # include <queue>

 # include <list>

 # define LL long long

 using namespace std ;

 int main()

 {

     //freopen("in.txt","r",stdin) ;

     int n ;

     while(scanf("%d",&n) != EOF)

     {

         int sum =  ;

         while(n)

         {

             if (n & )

                 sum++ ;

             n >>=  ;

         }

         printf("%d\n" , sum) ;

     }

     return ;

 }