More Problems

• Write a program to compute the number of unique characters in a string.
• Implement a function to find the longest palindromic substring in a string.
• Create a program to determine if a number is a prime number.
• Write a program to find the sum of the first n odd numbers.
• Implement a function to find the GCD of two numbers.
• Create a program to calculate the sum of digits of a number until a single digit is obtained.
• Write a program to check if a number is a perfect number using its divisors.
• Implement a function to find the average of a set of numbers.