How do you find the KTH last element of a linked list?

How do you find the KTH last element of a linked list?

Iterative Approach:

1. Take two pointers approach.
2. Move first pointer by k.
3. now move both the pointers and when the first pointer reaches the end of the list the second pointer will be at the kth node from the end.
4. Return the kth node data.

How do you find the KTH node from the end of a linked list in one pass?

Method 2 (Use two pointers) 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. Return the main pointer.

How do you find the 3rd element from last in a single pass?

7 Answers

1. Use two pointers: pointer-1 and pointer-2.
2. make pointer-1 points to third node in single linked list.
3. Now set pointer-2 points to first-node pointer-2 = node1; // point to 1st nd node1–>node2–>node3–>node4—> ……

How do you find the third node from the end in a singly linked list in C?

Initialize both the reference pointer and the main pointer to the head node. First, move reference pointer to n nodes from the head node. Now, move both the pointers one by one until the reference pointer reaches the end of the list. Now, the main pointer will point to the nth node from the end.

What does each element contains in a linked list?

A linked list is a common data structure made of a chain of nodes in which each node contains a value and a pointer to the next node in the chain. The head pointer points to the first node, and the last element of the list points to null. When the list is empty, the head pointer points to null.

In which linked list last node address is null?

7) How will you explain Circular Linked List? In the last node of a linked list, the link field often contains a null reference. Instead of including a null pointer at the end of the list, the last node in circular linked lists includes a pointer pointing to the first node.

How do you access linked list elements?

1. Add elements to a LinkedList. We can use the add() method to add an element (node) at the end of the LinkedList.
2. Access LinkedList elements. The get() method of the LinkedList class is used to access an element from the LinkedList.
3. Change Elements of a LinkedList.
4. Remove element from a LinkedList.

Can the size of a linked list be limited?

A LinkedList has no inherent limit and can grow beyond 2.1 billion. At this point size() could return Integer. MAX_VALUE, however some functions such as toArray will fail as it cannot put all objects into an array, in will instead give you the first Integer.