More Problems

• Write a program to check if a string is a valid hexadecimal color code.
• Write a program to find the longest palindrome substring in a string.
• Write a program to implement a simple text-based game with multiple levels.
• Write a program to find the smallest prime factor of a number using trial division.
• Write a program to sort an array of strings in alphabetical order.
• Write a program to implement a basic memory management simulation.
• Write a program to calculate the surface area of a cone.
• Write a program to check if a given string is a valid Roman numeral.