#include <stdio.h>
int main()
{
    int n;
    int pow[6]={1,2,4,8,16,32};
    scanf("%d",&n);
    int counter=0;
    for(int i=5;i>=0;i--)
    {
        if(n-pow[i]>=0)
        {
            n-=pow[i];
            counter++;
        }
    }
    printf("%d\n",counter);
}