##Easy Leetcode
##Tree traversals
- Inorder traversal (iterative+recursive)
- Preorder traversal (iterative+recursive)
- Postorder traversal (iterative+recursive)
- Level order traversal (iterative)
##Other questions 6. Sum of root to leaf/ print all root to leaf path 7. Invert Binary Tree 8. Sorted Array to Binary Search Tree 9. Minimum Distance between BST nodes 10. Lowest common ancestor of BST