Trees and BST in Python
Practice this questionWANT TO UNDERSTAND THE CONCEPT FIRST?Learn Trees and BST in Python
Tree node
class TreeNode:
def __init__(self, val=0, left=None, right=None):
self.val = val
self.left = left
self.right = rightProblems to practice
- Inorder traversal
- Preorder traversal
- Postorder traversal
- Level order traversal
- Maximum depth
- Diameter of tree
- Lowest common ancestor
- Validate BST
- Path sum
Example: inorder traversal
def inorder(root):
if not root:
return []
return inorder(root.left) + [root.val] + inorder(root.right)Adapted from 18_DSA_PYTHON.md · “7. Trees and BST in Python”. Code examples are study fragments. Difficulty and core labels are editorial estimates; version-specific behavior should be checked against your project.