Preorder Traversal

39 posts

Last Updated: 23 July 2025

InPreorder Traversal, the root node is visited first, followed by the left and right subtrees.Inorder Traversalstarts with the left subtree, visits the root, and then the ...read more

Paths of Triangular Number in a Binary Tree

Last Updated: 23 July 2025

Given a Binary Tree, the task is to output the Count of the number of paths formed by only a Triangular number. Xth Triangular number is the sum of the first X natural num...read more

Geeks Premier League 2023

Time and Space Complexity Analysis of Tree Traversal Algorithms

Last Updated: 31 May 2023

Let us discuss the Time and Space complexity of different Tree Traversal techniques, such as Inorder Traversal, Preorder Traversal, Postorder Traversal, etc.Time Complexit...read more

Data Structures-Tree Traversals

Tree Traversals

Complexity-analysis

Check if given Generic N-ary Tree is Symmetric horizontally

Last Updated: 23 July 2025

Given an N-ary tree root, the task is to check if it is symmetric horizontally (Mirror image of itself).Example:Input: root = 7 / / \ \ ...read more

Find direction of path followed from root by a linked list in a Binary Tree

Last Updated: 23 July 2025

Given root of the Binary Tree T and a linked list L, the task is to find the direction of path followed from root such that there exists a path from root to any leaf node ...read more

Minimize absolute difference between sum of subtrees formed after splitting Binary tree into two

Last Updated: 16 September 2021

Given a binary tree consisting of N nodes, the task is to split the binary tree into two subtrees by removing one edge such that the absolute difference of the sum of the ...read more

DSA

Preorder Traversal

PostOrder Traversal

Check if given inorder and preorder traversals are valid for any Binary Tree without building the tree

Last Updated: 23 July 2025

cGiven two arrays pre[] and in[] representing the preorder and inorder traversal of the binary tree, the task is to check if the given traversals are valid for any binary ...read more

Construct a Perfect Binary Tree from Preorder Traversal

Last Updated: 23 July 2025

Given an array pre[], representing the Preorder traversal of a Perfect Binary Tree consisting of N nodes, the task is to construct a Perfect Binary Tree from the given Pre...read more

Preorder, Postorder and Inorder Traversal of a Binary Tree using a single Stack

Last Updated: 23 July 2025

Given a binary tree, the task is to print all the nodes of the binary tree in Pre-order, Post-order, and In-order iteratively using only one stack traversal.Examples:Input...read more

Modify Binary Tree by replacing each node with the product of all remaining nodes

Last Updated: 23 July 2025

Given a Binary Tree consisting of N nodes, the task is to replace each node of the tree with the product of all the remaining nodes.Examples:Input: 1 / \ 2 3 ...read more

Basic Operations on Binary Tree with Implementations

Last Updated: 23 July 2025

The tree is a hierarchical Data Structure. A binary tree is a tree that has at most two children. The node which is on the left of the Binary Tree is called “Left-Child” a...read more

Technical Scripter 2020

Modify Binary Tree by replacing each node with the sum of its Preorder Predecessor and Successor

Last Updated: 23 July 2025

Given a binary tree consisting of N nodes, the task is to replace each node in the binary tree with the sum of its preorder predecessor and preorder successor.Examples:Inp...read more

Lexicographically smallest Palindromic Path in a Binary Tree

Last Updated: 23 July 2025

Given a Binary Tree with each node representing an alphabet, the task is to find lexicographically smallest palindromic root to leaf path. If no palindromic path exists, p...read more

Remove nodes from Binary Tree such that sum of all remaining root-to-leaf paths is atleast K

Last Updated: 23 July 2025

Given a Binary Tree and an integer k, the task is to delete nodes from the given Tree such that the sum of all nodes of all remaining root-to-leaf paths is at least k.Exam...read more

Print all root-to-leaf paths with maximum count of even nodes

Last Updated: 23 July 2025

Given a Binary tree, the task is to print all possible root-to-leaf paths having a maximum number of even valued nodes.Examples:Input: 2 / \ ...read more

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