More Problems

• Write a program to implement a basic event scheduling application.
• Write a program to check if a string is a valid email address using regex.
• Write a program to find the longest substring of unique characters in a string.
• Write a program to implement a simple file upload utility.
• Write a program to check if a number is a happy number using a function.
• Write a program to find the sum of all even numbers in a given range.
• Write a program to implement the counting sort algorithm.
• Write a program to check if two strings are permutations of each other.