DSA · Theory

AVL Tree

Theory

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AVL Tree (guide) is simple if you keep it on paper. Ananya uses it for folder on disk in a file explorer.

Do AVL Tree (guide) once by hand. left < root < right. Change one input. Say the new result out loud.

Skip AVL Tree (guide) and unbalanced BST becoming a list shows up in a file explorer.

Ananya ships AVL Tree (guide) in a file explorer. That is the use case worth saying.

If folder on disk breaks under AVL Tree (guide), check unbalanced BST becoming a list first.

Place AVL Tree (guide) next to nearby DSA work — left < root < right is the link.

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

Exam tip

Say AVL Tree (guide) in one breath, then left < root < right, then unbalanced BST becoming a list.

# AVL Tree
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

AVL Tree (guide) — Dry-run [4, 1, 3]. Say the list after one step.