More Problems

• Write a program to check if a string is a valid date in the format MM-DD-YYYY.
• Write a program to find the maximum sum rectangle in a 2D matrix.
• Write a program to implement a simple console-based note-taking application.
• Write a program to check if two binary trees are mirror images of each other.
• Write a program to find the longest substring of non-repeating characters.
• Write a program to implement the insertion sort algorithm with optimizations.
• Write a program to check if a number is a Fibonacci number using matrix exponentiation.
• Write a program to find the first unique character in a string using a frequency map.