More Problems

• Write a program to check if two queues can represent a valid sequence of operations for a stack.
• Implement a function that tracks the history of operations in a queue for undo functionality.
• Write a program to find the longest contiguous subsequence of even numbers in a queue.
• Implement a queue for managing feedback from users in an application.
• Write a program to find the maximum frequency of elements in a queue after multiple enqueue operations.
• Implement a function that uses a queue to simulate a multi-user chat application.
• Write a program to check if a queue can represent a valid binary search tree.
• Implement a queue that supports lazy deletion of elements.