How do I convert a Q...

Here are the steps to convert a Queue into a Stack:

Approach 1: Using two Queues

1. Create two queues, queue1 and queue2.
2. Enqueue all the elements from the given queue into queue1.
3. Dequeue elements from queue1 and enqueue them into queue2 until only one element is left in queue1.
4. The last element in queue1 is the top of the stack. Dequeue it and push it onto the stack.
5. Dequeue all the elements from queue2 and push them onto the stack.

Approach 2: Using one Queue

1. ...