How do you find the loop in a linked list?
Approach: This is the fastest method and has been described below:Traverse linked list using two pointers.Move one pointer(slow_p) by one and another pointer(fast_p) by two.If these pointers meet at the same node then there is a loop.
If pointers do not meet then linked list doesn’t have a loop..
How do you find the Nth node in a linked list?
Method 2 (Use two pointers) Initialize both reference and main pointers to head. First, move the reference pointer to n nodes from head. Now move both pointers one by one until the reference pointer reaches the end. Now the main pointer will point to nth node from the end.
How do you create a node in a linked list?
Java program to create a singly linked list of n nodes and count the number of nodesCreate a class Node which has two attributes: data and next. Next is a pointer to the next node in the list.Create another class which has two attributes: head and tail.addNode() will add a new node to the list: Create a new node.
How do you find an element in a linked list?
Searching in singly linked listStep 1: SET PTR = HEAD.Step 2: Set I = 0.STEP 3: IF PTR = NULL.STEP 4: REPEAT STEP 5 TO 7 UNTIL PTR != NULL.STEP 5: if ptr → data = item.STEP 6: I = I + 1.STEP 7: PTR = PTR → NEXT.STEP 8: EXIT.
How do you find the first node in a linked list?
Write a function findFirstLoopNode() that checks whether a given Linked List contains a loop. If the loop is present then it returns point to the first node of the loop. Else it returns NULL.