Given a Queue Q containing N elements. The task is to reverse the Queue. Your task is to complete the function rev(), that reverses the N elements of the queue.
Example 1:
Input: 6 4 3 1 10 2 6
Output: 6 2 10 1 3 4
Explanation: After reversing the given elements of the queue , the resultant queue will be 6 2 10 1 3 4.