// No.378 名声値を稼ごう
// https://yukicoder.me/problems/no/378
//

#include <iostream>
using namespace std;

long calc_point(long N);


int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    long N;
    cin >> N;
    long p1 = calc_point(N);
    long p2 = N * 2;
    cout << p2 - p1 <<  endl;
}

long calc_point(long N) {
    long ans = 0;

    while (N > 0) {
        ans += N;
        N /= 2;
    }
    return ans;
}