Minimum flip required to make Binary Matrix symmetric

Minimum flip required to make Binary Matrix symmetric is a DSA topic. In plain words you use it for folder on disk in a file explorer. Don’t start with a slogan — start with that picture.

Smallest example: left < root < right. Type it, run it, and say what you see. If you can do that from memory, you know Minimum flip required to make Binary Matrix symmetric.

From the example next to this theory: Minimum flip required to make Binary Matrix symmetric — arrays give O(1) index access; matrices are arrays of arrays.

Trap — unbalanced BST becoming a list. Fix that before you talk about advanced DSA.

Viva — what is Minimum flip required to make Binary Matrix symmetric? Then show left < root < right. Then name the trap.