Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
From the leaves all the way to the root, it is always a pair that is hashed together as it goes up the tree. Why is it a pair, and not three or more?