SDE - 2

You are given a path to a file/directory in Unix-style of length N, In a Unix-style file system, a dot(.) refers to the current directory. A double dot(..) refers to the previous directory in reference to the current directory. If there are multiple slashes between two directories you should consider it as a single slash.

Now, for a given directory path as a string, you are required to simplify the same and tell the final destination in the directory structure or the path.

The simplified path should always begin with a slash(/) and there must be a single slash between two directory names. There should not be a trailing slash.

Design a vending machine with cash/card support for payments

You are given a linked list containing 'n' nodes, where every node in the linked list contains two pointers:

(1) ‘next’ which points to the next node in the list

(2) ‘random’ which points to a random node in the list or 'null'.

Your task is to create a 'deep copy' of the given linked list and return its head.

Note:

A '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.