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

int main() {
    long long n;
    cin >> n;
    long long tot = 0LL;
    long long m = 2 * n;
    while (n > 0) {
        tot += n;
        n /= 2;
    }
    cout << m - tot << endl;
    return 0;
}