Topic: queue-problem / Level: advanced

• 2851. Implement a queue for managing online ticket sales for events.
• 2852. Write a program to find the longest palindromic subsequence in a queue of characters.
• 2853. Implement a queue that allows batch processing of elements.
• 2854. Write a program to find the maximum sum of any contiguous subarray in a queue.
• 2855. Implement a function that simulates a multi-threaded environment using a queue.
• 2856. Write a program to check if a queue can represent a valid infix expression after operations.
• 2857. Implement a queue for managing event registrations in a conference.
• 2858. Write a program to find the longest contiguous subsequence of odd numbers in a queue.
• 2859. Implement a queue for managing tasks in a real-time application.
• 2860. Write a program to find the first unique character in a queue after several operations.
• 2861. Implement a circular queue for managing student registrations.
• 2862. Write a program to find the sum of elements in a queue after removing negative numbers.
• 2863. Implement a function that uses a queue to generate combinations of a string.
• 2864. Write a program to track the history of enqueue and dequeue operations in a queue.
• 2865. Implement a queue for managing customer service requests.
• 2866. Write a program to find the longest increasing subsequence in a queue of characters.
• 2867. Implement a function that checks if two queues can represent a valid sequence of stack operations.
• 2868. Write a program to find the maximum product of any two numbers in a queue.
• 2869. Implement a queue that supports lazy deletion of its elements.
• 2870. Write a program to find the longest valid parentheses substring using a queue.
• 2871. Implement a queue for managing incoming messages in a chat application.
• 2872. Write a program to determine if a sequence of operations can produce a valid queue state.
• 2873. Implement a function to find the longest common subsequence of two strings using a queue.
• 2874. Write a program to find the maximum frequency of characters in a queue after multiple operations.
• 2875. Implement a queue for managing user feedback in a web application.
• 2876. Write a program to find the longest contiguous subsequence of prime numbers in a queue.
• 2877. Implement a circular queue that resizes dynamically based on demand.
• 2878. Write a program to check if a queue can represent a valid binary search tree after operations.
• 2879. Implement a queue for managing online course registrations.
• 2880. Write a program to find the first unique character in a stream of characters using a queue.
• 2881. Implement a function that tracks the history of enqueue and dequeue operations for undo functionality.
• 2882. Write a program to find the longest increasing subsequence in a queue of integers.
• 2883. Implement a queue for managing scheduled notifications in an application.
• 2884. Write a program to find the total number of distinct elements in a queue after several operations.
• 2885. Implement a function that evaluates an infix expression using a queue and stack.
• 2886. Write a program to check if two queues can represent a valid sequence of operations for a binary tree.
• 2887. Implement a queue that allows simultaneous enqueue and dequeue operations.
• 2888. Write a program to find the longest contiguous subsequence of even numbers in a queue.
• 2889. Implement a function that simulates a traffic management system using a queue.
• 2890. Write a program to find the average of numbers in a queue after removing odd numbers.
• 2891. Implement a queue for managing tasks in a multi-threaded environment.
• 2892. Write a program to find the longest valid parentheses substring using a queue and stack.
• 2893. Implement a queue for managing product recommendations in an online store.
• 2894. Write a program to find the maximum sum of elements in a queue after removing k elements.
• 2895. Implement a function that checks if a queue can represent a valid infix expression after operations.
• 2896. Write a program to find the total number of elements in a queue after various operations.
• 2897. Implement a queue that maintains the maximum element during a series of operations.
• 2898. Write a program to find the longest increasing subsequence of characters in a queue.
• 2899. Implement a function that uses a queue to find all combinations of k elements from a set.
• 2900. Write a program to find the first unique integer in a queue after multiple operations.

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