#include <iostream>
using namespace std;
typedef long long INT;

INT fn1(INT n)
{
    if (n == 0) return n;
    return n + fn1(n / 2);
}

INT fn2(INT n)
{
    if (n == 0) return n;
    INT r1 = n * 2;
    INT r2 = n + fn2(n / 2);
    return max(r1, r2);
}

int main()
{
    INT N, R1, R2;
    cin >> N;
    R1 = fn1(N);
    R2 = fn2(N);
    cout << R2 - R1 << endl;
}