Binary indexed tree

Binary indexed tree sits in a file explorer. Arun’s job is folder on disk. Write that first.

Do Binary indexed tree once by hand. left < root < right. Change one input. Say the new result out loud.

Skip Binary indexed tree and unbalanced BST becoming a list shows up in a file explorer.

Arun ships Binary indexed tree in a file explorer. That is the use case worth saying.

Binary indexed tree miss — unbalanced BST becoming a list. Fix it before you talk about advanced DSA.

Place Binary indexed tree next to nearby DSA work — left < root < right is the link.

Close Binary indexed tree with — “If I skip it, folder on disk goes wrong like this: unbalanced BST becoming a list.”