Array Two sum Circular Queue Majority Element using Boyer Moore Majority Algo String Ransome Note Premutations of a String Linked List Palindrome Linked List Middle of Linked List Tree Max Heap Trie using HashTable / Map Min/Max depth of a tree Invert binary tree Path Sum Kth Largest Sum of Left Leaf Symmetric Tree or Mirror Image Sub tree of another tree Miscellaneous Roman To Integer Number To Words Data Pipeline - analyze-user-website-visit-pattern Sort Merge Sort Quick Sort