Coding Problem: Analyzing and Modifying a Singly Linked List

Objective: Understand the function $`$whatDoesItDo$`$ that manipulates a singly linked list and demonstrate its effect on a given linked list in the c language.

Structure Definition:

typedef struct node $\{$

int num;

struct node$*$ next;

$\}$ node;

Function Signature:

int whatDoesItDo$($node $*$head$)$;

Edge samples, must account for all:

Empty List: The head pointer is NULL. The function should handle this case gracefully by returning NULL or head.

Single Node List: The list contains only one node. The function should not attempt to access next pointers

that do not exist.

Two Node List: The list contains only two nodes. The function should correctly handle the case where other$->$next is NULL.

Odd Number of Nodes: The list contains an odd number of nodes. The function should correctly handle the traversal and manipulation without causing any segmentation faults or incorrect links.

Even Number of Nodes: The list contains an even number of nodes. The function should correctly handle the traversal and manipulation without causing any segmentation faults or incorrect links

Criteria for code, must be included within code:

Correctly identifies the purpose and behavior of the function $`$whatDoesItDo$`.$

Correctly identifies the purpose and behavior of the function $`$whatDoesItDo$`$

Step$-$by$-$step explanation of how the function modifies the list

Accurate final representation of the linked list

after the function has finished.

Considers edge cases such as empty list or lists with less than three nodes.

Clear, well$-$commented, and properly formatted code analysis.

Ensure the function and code in each problem are free of memory leaks and handle all

possible edge cases.

Comments should clearly explain the logic and any assumptions made.

The code should be appropriately formatted and easy to read.

Handle any input edge cases gracefully without causing crashes or undefined behavior.