//#include <fstream>
#include <iostream>


using namespace std;

//ifstream fin(".in");
//ofstream fout(".out");

int a,i,p,nr;

int main()
{

    cin >> p;

    for(i = 0;  (2<<i)<=p; ++i)
        if(p&(2<<i))
            ++nr;

    if(p%2)
        ++nr;

    cout <<nr;


    return 0;
}