More Problems

• Write a program to check if a string is a valid email address format.
• Write a program to find the total number of uppercase and lowercase letters in a string.
• Write a program to implement a simple file copy application.
• Write a program to check if a number is a perfect number using its divisors.
• Write a program to find the first occurrence of a character in a string.
• Write a program to implement a simple online quiz application with user authentication.
• Write a program to check if two strings can be made equal with a limited number of character changes.
• Write a program to find the longest common subsequence in a string using dynamic programming.