More Problems

• Implement a function to calculate the total number of unique characters in a string.
• Create a program to find the sum of the first n odd numbers using recursion.
• Write a program to check if a number is a prime palindrome.
• Implement a function to calculate the sum of the digits of a number until it is a single digit.
• Create a program to find the maximum sum of a contiguous subarray of size k.
• Write a program to determine if a number can be expressed as a sum of two squares.
• Implement a function to find the GCD of three numbers.
• Create a program to compute the average of prime numbers in a list.