#include <iostream>
int main()
{
using namespace std;
int number = 0;
int count = 0;
cin>>number;
while(number)
{
number = number&(number-1);
count++;
}
cout<<count<<endl;
return 0;
}
int main()
{
using namespace std;
int number = 0;
int count = 0;
cin>>number;
while(number)
{
number = number&(number-1);
count++;
}
cout<<count<<endl;
return 0;
}