Introduction to Tree Traversals
Learning Traversals DSA practice problem on Onlearn.
Difficulty: easy.
Topics: Tree Traversal Methods in Binary Trees (DFS & BFS), Binary Tree, Traversal, Depth-First Search, Breadth-First Search, In-order Traversal, Preorder Traversal, Postorder Traversal, Level Order Traversal, Recursion, Stack, Queue, Time Complexity, Space Complexity, Algorithm, inorder traversal, space complexity, level order traversal, dfs, stack, queue, binary tree, time complexity analysis, preorder traversal, postorder traversal, recursion, bfs, tree traversal, Tree Traversals (DFS), Tree Traversal (BFS).
Tree Traversal Orders Problem Statement Given the root of a binary tree, return the inorder, preorder, postorder, and level order traversal of its nodes' values. Input Specification The binary tree will be represented by an array of integers nodes. nodes[i] is the value of the node at index i. If nodes[i] is 1, it represents a null node. The array represents the tree in a level order fashion, meaning nodes[0] is the root, nodes[1] and nodes[2] are its left and right children respectively, and so on. Output Specification Print four lines, each representing a traversal: Line 1: Inorder Traversal (space separated values) Line 2: Preorder Traversal (space separated values) Line 3: Postorder Traversal (space separated values) Line 4: Level Order Traversal (space separated values) Constraints The number of nodes in the tree is between 0 and 1000. Node values are between 1 and 1000. 1 represents a null node. Sample Test Cases Sample Input: Explanation of Sample Input Tree: Sample Output: