#include <bits/stdc++.h>
using namespace std;

using i64 = int64_t;

i64 f(i64 n) {
    i64 res = 0;
    while(n > 0) {
        res += n;
        n /= 2;
    }
    return res;
}

signed main() {
    i64 N; cin >> N;

    i64 ans = 2*N - f(N);

    cout << ans << "\n";
}