Answer
See the explanation
Work Step by Step
To reverse two adjacent entries in one of the queues using the given constraints, you can follow the steps below:
1. Dequeue the first entry from the queue and enqueue it back to the same queue. This will move the first entry to the end of the queue.
2. Dequeue the second entry from the queue and enqueue it back to the same queue. This will move the second entry to the end of the queue, right after the first entry.
3. Dequeue all the entries from the queue until you reach the first entry that you want to reverse. Enqueue each dequeued entry to a temporary queue.
4. Dequeue the first entry that you want to reverse from the queue and enqueue it to the temporary queue.
5. Dequeue the second entry that you want to reverse from the queue and enqueue it to the temporary queue.
6. Dequeue the remaining entries from the queue and enqueue them back to the temporary queue.
7. Dequeue all the entries from the temporary queue and enqueue them back to the original queue.
By following these steps, you will have reversed the two adjacent entries in the original queue.
