More Problems

• Write a program to check if a number is a friendly number.
• Write a program to find the maximum product of any three numbers in an array.
• Write a program to implement a basic job scheduling system with priorities.
• Write a program to check if a string is a valid hex number.
• Write a program to find the first unique character in a string with the least number of appearances.
• Write a program to implement a simple online course platform with user enrollment.
• Write a program to check if a number is a strong composite number.
• Write a program to find the longest common subsequence using memoization.