PostOrder Traversal

37 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

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

Convert given binary tree to a XOR tree

Last Updated: 23 July 2025

Given a Binary Tree where each node has a value of either 0 or 1, the task is to convert the given Binary tree to an XOR tree i.e a tree such that each node value is the l...read more

Morris traversal for Postorder

Last Updated: 08 October 2025

Given the root of a binary tree, Find its postorder traversal using Morris Traversal, i.e., without using recursion or a stack.Examples:Input: Output: [4, 5, 2, 3, 1]...read more

Count of nodes in given N-ary tree such that their subtree is a Binary Tree

Last Updated: 23 July 2025

Given an N-ary tree root, the task is to find the count of nodes such that their subtree is a binary tree.Example:Input: Tree in the image belowOutput: 11Explanation: The ...read more

Count the number of common ancestors of given K nodes in a N-ary Tree

Last Updated: 23 July 2025

Given an N-ary tree root and a list of K nodes, the task is to find the number of common ancestors of the given K nodes in the tree.Example:Input: root = 3 / \ ...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

Trim given Binary Tree for any subtree containing only 0s

Last Updated: 23 July 2025

Given a Binary tree, the task is to trim this tree for any subtree containing only 0s.Examples:Input: 1 \ 0 / \ ...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

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

Minimum number of cameras required to monitor all nodes of a Binary Tree

Last Updated: 23 July 2025

Given a Binary Tree consisting of N nodes, the task is to find the minimum number of cameras required to monitor the entire tree such that every camera placed at any node ...read more

Sum of nodes having sum of subtrees of opposite parities

Last Updated: 23 July 2025

Given a Binary Tree, the task is to find the sum of all such nodes from the given tree whose sum of left and right subtree is either odd and even or even and odd respectiv...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

Length of longest straight path from a given Binary Tree

Last Updated: 15 July 2025

Given a Binary Tree, the task is to find the length of the longest straight path of the given binary tree.Straight Path is defined as the path that starts from any node an...read more

Count pairs of leaf nodes in a Binary Tree which are at most K distance apart

Last Updated: 15 July 2025

Given a binary tree and an integer K, the task is to count the possible pairs of leaf nodes from the given binary tree such that the distance between them is at most K.Exa...read more

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