#include<iostream>
#include<math.h>
using namespace std;
int main()
{
    int input;
    int result = 0;
    while(cin>>input)
    {
        while(input)
        {
            result += input%2;
            input = floor(input/2);
        }
        cout << result <<endl;
        result = 0;
    }
    return 0;
}