#include <bits/stdc++.h>
using namespace std;
using ull = unsigned long long;
ull f(ull a) {
    if (a == 1) {
        return 1;
    } else if (a % 2) {
        return f(a - 1) + a;
    } else {
        return 2 * f(a / 2) + a / 2 * a / 2;
    }
}
int main() {
    ull N;
    cin >> N;
    cout << f(N) << '\n';
}