#include<bits/stdc++.h>
using namespace std;
int main() {
	long long n,m,i,num;
	cin>>n;
	long long s=(n+1)/2;
	for(i=1;i<=n/4;i+=2)
	{
		num=0;
		m=i;
		while(m<=n/2){
			num++;
			m*=2;
		}
		s+=num/2;
	}
	cout<<s<<endl;
	return 0;
}