#include <iostream>
#include <math.h>
using namespace std;
int main()

{
long long n,c=0,s=0,k=0;
cin>>n;
while(n)
{
if(n%2==1)
s=s+pow(10,c);
if(s%10==1)
k++;
c++;
n=n/2;
}
cout << k;
}