The conversation between human and AI assistant.
How can we reverse a stack by using only push() and pop() operations without using any secondary DS?
No, I specifically said that I don't want to use any secondary data structure. Do you have any other solutions?
Yes, another approach could be to use a recursive function that first empties the original stack by popping elements off one by one, and then pushes each element onto the stack again in reverse order. This approach does not require any additional data structures. Would you like me to write some code to illustrate this approach?