Add two numbers represented by linked lists

Add two numbers represented by linked lists is a DSA topic. In plain words you use it for a ticket queue node in a counter. Don’t start with a slogan — start with that picture.

Smallest example: head → next → …. Type it, run it, and say what you see. If you can do that from memory, you know Add two numbers represented by linked lists.

From the example next to this theory — Add two numbers represented by linked lists: dry-run [4, 1, 3].

Trap — losing the next pointer on delete. Fix that before you talk about advanced DSA.

Viva — what is Add two numbers represented by linked lists? Then show head → next → …. Then name the trap.