More Problems

• Write a program to check if a number can be expressed as the sum of three cubes.
• Write a program to find the longest sequence of repeating characters in a string.
• Write a program to implement a basic online store with user authentication.
• 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.