class Pointer {
    uint64_t* m_pArray;

public:
    explicit inline Pointer(size_t capacity) : 
		m_pArray((uint64_t*)alloca(sizeof(m_pArray[0]) * capacity)) {
    }

	uint64_t& at(size_t n){ return m_pArray[n]; };
};

int main()
{
	uint64_t a = 777;
	Pointer p(2);
	uint64_t b = 888;

	p.at(0) = 0;
	p.at(1) = 111;

	return 0;
}

	uint64_t a = 777;
	
	Pointer p(2);
	p.at(0) = 0;
	p.at(1) = 111;

	Pointer p2(2);
	p2.at(0) = 222;
	p2.at(1) = 333;

	uint64_t b = 888;