#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

int n,nr;
int main()
{
//freopen("date.in","r",stdin);
//freopen("date.out","w",stdout);
cin>>n;
for(int i=0; (1<<i)<=n; i++)if((n&(1<<i))!=0)nr++;
cout<<nr;
    return 0;
}