#define _USE_MATH_DEFINES
 
#include <iostream>
#include <iomanip>
#include <sstream>
 
#include <algorithm>
#include <cmath>
 
#include <string>
#include <queue>
#include <vector>
#include <complex>
#include <set>
#include <map>
#include <stack>
#include <list>

#include <valarray>

#include<cassert>//assert();
//#include <random>//xAOJ
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
 
#define PII pair<int,int>
/////////
typedef long long LL;
typedef long double LD;
typedef unsigned long long ULL;
/////////
using namespace::std;
/////////
/////////
ULL popcount(ULL N){
	ULL ret = N;
	ret = ((0xAAAAAAAAAAAAAAAA & ret)>> 1) + (0x5555555555555555 & ret);
	ret = ((0xCCCCCCCCCCCCCCCC & ret)>> 2) + (0x3333333333333333 & ret);
	ret = ((0xF0F0F0F0F0F0F0F0 & ret)>> 4) + (0x0F0F0F0F0F0F0F0F & ret);
	ret = ((0xFF00FF00FF00FF00 & ret)>> 8) + (0x00FF00FF00FF00FF & ret);
	ret = ((0xFFFF0000FFFF0000 & ret)>>16) + (0x0000FFFF0000FFFF & ret);
	ret = ((0xFFFFFFFF00000000 & ret)>>32) + (0x00000000FFFFFFFF & ret);
	return ret;
}

void solve(){
	ULL N;
	cin >> N;
	cout << popcount(N) << endl;
}

int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(16);//
	
	solve();
	
	return 0;
}