#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int64_t n;
    cin >> n;
    int64_t m = 0, t = n;
    while (t > 0) {
        m += t;
        t /= 2;
    }
    cout << n * 2 - m << endl;
    return 0;
}