More Problems

• Write a program to check if a queue can represent a valid infix expression after operations.
• Write a program to implement a queue that retrieves both the maximum and minimum elements efficiently.
• Write a program to find the first unique integer in a queue after several enqueue operations.
• Write a program to implement a queue for managing online courses.
• Write a program to find the longest subsequence of characters in a queue.
• Write a program to simulate a food delivery queue for restaurants.
• Write a program to implement a queue for managing project tasks.
• Write a program to find the average of numbers in a queue after removing negative numbers.