#include <iostream>
#include <vector>
using namespace std;
typedef long long LL;
int main(int argc, char* argv[])
{

	LL N;
	cin>>N;
	LL x1=N*2;
	LL x2=N;
	N/=2;
	while (N>0){
		x2+=N;
		N/=2;

	}
	LL ans=x2-x1;
	if (ans<0){
		ans=-ans;
	}
	cout<<ans<<endl;
	return 0;
}