More Problems

• Write a program to check if a string contains balanced parentheses using a stack.
• Write a program to find the sum of the digits of a number until a single digit is obtained.
• Write a program to implement a basic task management application with due dates.
• Write a program to check if a number is a sociable number.
• Write a program to find the maximum sum of a non-contiguous subarray using dynamic programming.
• Write a program to implement a simple user registration system with validation.
• Write a program to check if a string is a valid email address format.
• Write a program to find the longest palindromic substring using dynamic programming.