#include <iostream>
#include <string>
#include <algorithm>
//#include <math.h>

using namespace std;

void process(int num, int& res){
    while(num != 0){
        res++;
        num &= (num - 1);
    }
}

int main(){
    int num = 0;
    cin>>num;
    int res = 0;
    process(num, res);
    cout<<res<<endl;
    
    return 0;
}