Van Emde Boas Tree

If you can teach Van Emde Boas Tree using folder on disk, you know it. If you only know the heading, you don’t.

Van Emde Boas Tree on the board — left < root < right. Then say what folder on disk looks like after.

Without Van Emde Boas Tree, a file explorer gets messy and folder on disk is hard to trust.

Use Van Emde Boas Tree when folder on disk must stay clear. If a simpler DSA step works, use that instead.

If folder on disk breaks under Van Emde Boas Tree, check unbalanced BST becoming a list first.

Place Van Emde Boas Tree next to nearby DSA work — left < root < right is the link.

Viva for Van Emde Boas Tree — what it is → left < root < right → the mistake (unbalanced BST becoming a list).