Problem : You are given an array of linked lists (each element in the array points to a linked list), as follows:

typedef struct _list_t_ {
	int data;
	struct _list_t_ *next;
} list_t;

list_t *arr[100];

Problem : You are given a malformed linked list in which one of the list element's next pointer points back to the same element. Write a function to return a pointer to the list structure with the incorrect next pointer.

Problem : You are given a pointer to somewhere in the middle of a doubly-linked list of integers:

typedef struct _list_t_ {
	int data;
	struct _list_t_ *next;
	struct _list_t_ *prev;
} list_t;


Find the largest element in the list.

Problem : If a linked list were in sorted order, would you be able to write a search routine that worked in less than $O(n)$ time?

Problem : Given a singly-linked list, return a pointer to the first element whose data field is less than or equal to the data element of the last value in the list.