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 sum of the digits of a hexadecimal number using a function.
• Write a program to implement a basic spell checker using a dictionary of words.
• Write a program to check if two binary trees are structurally identical.
• Write a program to find the longest palindromic prefix in a string.
• Write a program to implement a basic user authentication system with login/logout functionality.
• Write a program to check if a number is an automorphic number using a function.
• Write a program to find the total number of palindromic substrings in a given string.