More Problems

• Write a program to check if two binary trees are mirror images of each other.
• Write a program to find the maximum sum of a contiguous subarray using a divide-and-conquer approach.
• Write a program to implement a basic stack with minimum element retrieval.
• Write a program to solve the "Word Ladder" problem using breadth-first search.
• Write a program to check if a number is a happy number using cycle detection.
• Write a program to find the longest substring with at most k distinct characters.
• Write a program to implement a simple online exam platform with timed quizzes.
• Write a program to check if a binary tree is a valid binary search tree.