A doubly circular linked list is a type of linked list where each node has both a "next" and a "previous" pointer, allowing for traversal in both directions. Additionally, the last node in the list points back to the first node, forming a circle.
A stack can be implemented using two queues in C. The basic idea is to use one queue for enqueue operations and another for dequeue operations. When an element is pushed onto the stack, it is enqueued