More Problems

• Write a program to find the first unique character in a stream using a queue.
• Implement a function that uses a queue to find all combinations of k elements from a given set.
• Write a program to find the maximum frequency of characters in a queue after removing duplicates.
• Implement a queue for managing job applications in a hiring process.
• Write a program to find the longest valid parentheses substring using a queue and stack.
• Implement a queue that supports lazy deletion of elements.
• Write a program to find the sum of elements in a queue after removing negative numbers.
• Implement a function that uses a queue to track the state of a game simulation.