#include <bits/stdc++.h>

using namespace std;

#define LL long long

int main() {
    LL n;
    cin >> n;
    LL ans1 = 0, ans2 = 2 * n, tmp = n;
    while (tmp > 0) {
        ans1 += tmp;
        tmp /= 2;
    }
    cout << ans2 - ans1 << endl;
    return 0;
}