Hi, How would I go about making a structure implementation of a linked list of linked lists eg list of shops and each shop has another list of customers, i already have an implementation of the main linked list, i am just a little confused as to how i make another list of based on a common element in the main list, the way I thought of approching it was to put the common element into both lists and search for the element and compile the list based on another list that way, but it seems flawn and i think thats against the point of the exercise.

Any help is much appreciated, Thanks.