#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <map>
#include <iomanip>
#include <math.h> 
#include <stack>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <tuple>
#include <cctype>
#include <ctype.h>
#include <set>
#include <sstream>

using namespace std;

int main(){
	int i, j;
	long long nn=0,n=0, sum1=0,sum2=0;

	cin >> n;

	nn = n;

	while (n>0)
	{
		sum1 += n;
		n /= 2;
	}

	cout << nn * 2 - sum1 << endl;










	getchar();
	getchar();
	return 0;
}