#include<bits/stdc++.h>
using namespace std;
int main()
{
long long n;
cin >> n;
long long count = 0;
while (n > 0) {
if (n & 1) {
count++;
}
n >>= 1;
}
cout << count << endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int main()
{
long long n;
cin >> n;
long long count = 0;
while (n > 0) {
if (n & 1) {
count++;
}
n >>= 1;
}
cout << count << endl;
return 0;
}