More Problems

• Write a program to check if a number is a happy number using cycle detection.
• Write a program to find the longest sequence of repeating characters in a string.
• Write a program to implement the Sieve of Eratosthenes for finding prime numbers.
• Write a program to check if a binary tree is a valid binary search tree using in-order traversal.
• Write a program to find the shortest path in a grid with obstacles using A* search.
• Write a program to implement a simple online survey application with user feedback.
• Write a program to check if a string can be rearranged to form a valid anagram.
• Write a program to find the total number of vowels in a string using a loop.