#include <iostream>
#include <cstdint>

using namespace std;

constexpr uint16_t pop_count(uint64_t a) noexcept
{
	uint16_t ans = UINT16_C(0);
	for (; a != UINT64_C(0); a >>= UINT64_C(1))
		if(a & UINT64_C(1)) ++ans;

	return ans;
}

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

	uint64_t N;
	cin >> N;

	cout << ((UINT64_C(1) << pop_count(N)) - 2) << '\n';
	return 0;
}