#include<iostream>
using namespace std;
int n,z,c;
int main()
{
    cin>>n;
    c=0;
    while(n>0)
    {
        z=1;
        while(z*2<=n)
        {
            z=z*2;
        }
        n=n-z;
        c++;
    }
    cout<<c;
    return 0;
}