More Problems

• Write a program to check if a string is a valid phone number format.
• Write a program to calculate the factorial of a number using dynamic programming.
• Write a program to implement a simple movie rental system.
• Write a program to find the smallest number in an array using a function.
• Write a program to check if a string contains only lowercase letters.
• Write a program to find the common elements in two linked lists.
• Write a program to calculate the area of a circle using a function.
• Write a program to check if a number is a perfect square using a function.