More Problems

• Write a program to implement a basic contact book that stores names and phone numbers.
• Write a program to check if a string is a valid binary search tree representation.
• Write a program to find the total number of palindromic substrings in a string.
• Write a program to implement a simple online banking application with account creation.
• Write a program to check if a string is a valid date in the format YYYY/MM/DD.
• Write a program to find the first missing positive integer in an unsorted array.
• Write a program to implement a basic quiz application that calculates user scores.
• Write a program to check if a number is an automorphic number using a function.