More Problems

• Write a program to find the sum of all the unique elements in an array.
• Write a program to check if a string is a valid time in the format HH:MM
• Write a program to implement a simple character encoding and decoding utility.
• Write a program to calculate the surface area of a cone using its radius and height.
• Write a program to check if a string contains balanced parentheses using recursion.
• Write a program to implement a simple online feedback system for products.
• Write a program to find the longest increasing subsequence in a sequence of numbers.
• Write a program to check if a number is a strong number using a function.