#include <stdio.h>


int main()
{
    int n;
    int count = 0;
    scanf("%d", &n);
    while (n)
    {
        if (n % 2 == 1)
        {
            count++;
        }
        n /= 2;
        if (n == 1)
        {
            count++;
            break;
        }
    }
    printf("%d", count);
    return 0;
}