#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <math.h>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
using namespace std;

#define ll long long
#define INF (1 << 30)
#define INFLL (1LL << 60)

int main() {
	ll n,sum = 0;
	cin >> n;
	ll now = n;
	while(now){
		sum += now;
		now /= 2;
	}
	cout << n * 2 - sum << endl;
	return 0;
}