More Problems

• Write a program to find the total number of lines in a text file.
• Write a program to check if a number is a happy number using the tortoise and hare algorithm.
• Write a program to implement a basic online attendance management system.
• Write a program to check if two strings are anagrams using character frequency.
• 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.