Max Stacks

The lecture introduces the concept of a Max Stack, which is similar to a regular stack but also keeps track of the maximum value. The instructor demonstrates how to perform push operations, comparing values to maintain the Max Stack. The lecture also covers how to use get Max and pop operations to retrieve and remove values. The session concludes with a brief code explanation and a summary of the key points discussed.

What is the first step in creating a Max Stack?

• Use a dictionary to store values

• Create a list to use as a stack

• Sort the elements

• Initialize a queue

When adding a new element to the Max Stack, what should you do if the stack is not empty?

• Remove the last element

• Add the element without checking

• Compare the new element with the current maximum

• Sort the stack

What operation would you use to retrieve the maximum value from the Max Stack?

• peek

• pop

• getMax

• push

How do you ensure the Max Stack is updated correctly when popping an element?

• Always remove the first element

• Check if the popped element is the current maximum

• Ignore the Max Stack

• Add a new element to the stack

In terms of code, what should you do if a new element is greater than the current maximum?

• Sort the Max Stack

• Ignore the new element

• Append the new element to the Max Stack

• Remove the current maximum