More Problems

• Implement a function to generate all permutations of a given string using a queue.
• Write a program to check if a sequence of numbers can represent a valid queue sequence.
• Design a data structure that supports the following operations in O(1) time: insert, delete, get random element, and retrieve maximum.
• Write a program to find the minimum cost of merging n sorted arrays using a priority queue.
• Implement a function that uses a queue to perform breadth-first search (BFS) in a graph.
• Write a program to find the longest valid parentheses substring using a queue.
• Implement a sliding window maximum algorithm using a queue.
• Write a program to simulate a multi-level feedback queue scheduling algorithm.