#include<stdio.h>
int main()
{
    long int n;
    ;
    while(scanf("%ld",&n)==1)
    {

       int ans=0,r;
        while(n)
        {
            r=n%2;
            ans+=r;
            n/=2;

        }
        printf("%d\n",ans);
    }
    return 0;
}