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Pattern 9 of 15
Master tree traversal including preorder, inorder, postorder DFS, level order BFS, lowest common ancestor, and tree serialization techniques.
6
90 min
Master preorder traversal for tree construction, inversion, and path problems. Visit root before children.
Master inorder traversal for BST validation and kth element problems. Produces sorted order in BST.
Master level order traversal using BFS. Solve zigzag, right side view, and level sum problems.
Master postorder traversal for tree height, diameter, and path sum problems. Process children before root.
Learn to serialize and deserialize binary trees. Convert trees to strings and reconstruct them.
Find lowest common ancestor in binary trees and BSTs using recursive and iterative approaches.
Access theory, code examples, and practice problems.
Open DSA Learning Path