#include <cstdio>
#include <iostream>
#include <fstream>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <sstream>
#include <iomanip>
#include <cmath>
#include <cstdlib>
#include <ctype.h>
#include <cstring>
#include <string>
#include <ctime>
#include <cassert>
#include <utility>

using namespace std;

int n;

int main() {
//	freopen("date.in", "r", stdin);
//	freopen("date.out","w", stdout);

	cin >> n;

    int cnt = 0;
    for(int i = 0; i < 32; i++)
        if(n & (1 << i))
            cnt++;
    cout << cnt;

	return 0;
}