#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
#ifdef _WIN32
#include <Windows.h>
#endif

int main()
{
    long long n, sum1 = 0, i;
    cin >> n;
    i = n;
    while (n){
        sum1 += n;
        n /= 2;
    }
    cout << i*2 - sum1 << endl;
}