How can you implement a stack such that you can retrieve the minimum element in constant time?
- It's not possible
- Using a linked list
- Using a priority queue
- Using an additional stack
You can implement a stack that allows retrieving the minimum element in constant time by using an additional stack to keep track of the minimum values. Whenever you push an element onto the main stack, you compare it with the top element of the auxiliary stack and push the smaller of the two. This ensures constant-time retrieval of the minimum element.
Loading...
Related Quiz
- In Python, the ____ keyword is used to define a generator function.
- The ____ method in TensorFlow or PyTorch is used to apply gradients to variables.
- You are given a task to analyze the correlation between different numerical features in a dataset. Which Pandas method would you use to quickly observe the pairwise correlation of columns?
- You need to implement a feature where the Python back-end sends a dynamically generated PDF file to the front-end. How would you handle this scenario to ensure the user can easily download the file?
- Which Python built-in function would you use to convert a string into a number?