#include <stdio.h>

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

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