More Problems

• Write a program to find the first duplicate number in a queue.
• Write a program to simulate a queue for managing online orders.
• Write a program to find the total number of operations performed on a queue.
• Write a program to implement a queue for managing game turns.
• Write a program to check if a queue can represent a valid operation sequence.
• Write a program to find the first non-repeating integer after multiple enqueue operations.
• Write a program to implement a queue that supports enqueue and dequeue in O(1).
• Write a program to find the total number of distinct characters in a queue.