How do I copy a linked list with a random pointer?

How do I copy a linked list with a random pointer?

1) Create all nodes in copy linked list using next pointers. 2) Store the node and its next pointer mappings of original linked list. 3) Change next pointer of all nodes in original linked list to point to the corresponding node in copy linked list.

What is deep copy in linked list?

Deep copy of a Linked List means we do not copy the references of the nodes of the original Linked List rather for each node in the original Linked List a new node is created. The next pointer of the newly created node is then made to point to the new node we get from the next recursion.

How do you clone a linked list?

Below is algorithm.

1. Traverse the original linked list and make a copy in terms of data.
2. Make a hash map of key value pair with original linked list node and copied linked list node.
3. Traverse the original linked list again and using the hash map adjust the next and random reference of cloned linked list nodes.

What is the difference between deep and shallow copy?

Deep copy stores copies of the object’s value. Shallow Copy reflects changes made to the new/copied object in the original object. Deep copy doesn’t reflect changes made to the new/copied object in the original object. Shallow Copy stores the copy of the original object and points the references to the objects.

Are link is the pointer pointing to the?

A linked list consists of various nodes, and each node contains two things: One is the data, and the other is the pointer, which will point to the next node. A linked list basically can have n nodes, and each node is connected to its next node with the help of a pointer.

What is a deep copy of a list?

Deep copy is a process in which the copying process occurs recursively. It means first constructing a new collection object and then recursively populating it with copies of the child objects found in the original. In case of deep copy, a copy of object is copied in other object.

How to clone a linked list with next and random pointer?

1) Create all nodes in copy linked list using next pointers. 2) Store the node and its next pointer mappings of original linked list. 3) Change next pointer of all nodes in original linked list to point to the corresponding node in copy linked list.

How to create a deep copy of a linked list?

A linked list of length n is given such that each node contains an additional random pointer, which could point to any node in the list, or null. Construct a deep copy of the list. The deep copy should consist of exactly n brand new nodes, where each new node has its value set to the value of its corresponding original node.

Can a pointer point to a copied list?

Both the next and random pointer of the new nodes should point to new nodes in the copied list such that the pointers in the original list and copied list represent the same list state. None of the pointers in the new list should point to nodes in the original list.

How to create a list with a random pointer?

1 val: an integer representing Node.val. 2 random_index: the index of the node (range from 0 to n-1) that the random pointer points to, or null if it does not point to any node.