#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main(){
	ll n; cin>>n;
	ll a=n; ll cnt=0; ll f=-1;
	while(a>0){
		cnt+=a;
		if(a%2==1) f++;
		a/=2;
	}
	cout<<f+1<<endl;
}