#include <iostream>

using lint = long long;

void solve() {
    lint d;
    std::cin >> d;

    for (int t = 60;; --t) {
        lint ans = 0, rem = d;

        for (int k = 60; k >= 0; --k) {
            lint sum = 0;
            for (int i = 0; i < t && i <= k; ++i) {
                sum += 1LL << (k - i);
            }
            if (sum > rem) continue;

            ans += 1LL << k;
            rem -= sum;
        }

        if (rem == 0) {
            std::cout << ans << "\n";
            return;
        }
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}