#include <stdio.h>

int count(int n)
{
    int nr;
    nr=0;
    if (n == 1)
        return 1;
    else
    {
        while(n != 0)
        {
            if (n % 2 == 1)
                nr++;
            n = n/2;
        }
    return nr;
    }
}

int main(void)
{
    int n;
    do
    {
        scanf("%d", &n);
    }while(!(n < 32));
    printf("%d", count(n));
    return 0;
}