#include <cstdio>
#include <cmath>
#include <cstring>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <map>
#include <set>
#include <array>
#include <queue>
#include <string>
#include <vector>
#include <numeric>
#include <algorithm>
#include <functional>
#define MOD 1000000007
#define INF 11234567890
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;
typedef std::pair<int, int> P;

LL N;
LL normal, super;

int main()
{
	in >> N;

	normal = N, super = N * 2;
	while (N > 0)
	{
		normal += (N /= 2);
	}

	out << super - normal << std::endl;
	return 0;
}