Post order traversal, Data Structure & Algorithms

Assignment Help:

Post order traversal:

The children of node are visited before the node itself; the root is visited last. Each node is visited after its descendents are visited.

Algorithm for postorder traversal is following:

1. Traverse left sub-tree in post order

2. Traverse right sub-tree in post order

3. visit root node.

Determining the space occupied through files & directories in a file system need a postorder traversal as the space occupied through directory needs calculation of space needed by all files in the directory (children in tree structure)

2078_Post order traversal.png

          Figure:  Calculation of space occupied by a file system: A post order traversal

Since each of the nodes is traversed only once, the time complexity of post order traversal is T(n) = O(n), where n refer to number of nodes in the tree.


Related Discussions:- Post order traversal

Explain the concept of colouring, Colouring The use of colours in CAD/C...

Colouring The use of colours in CAD/CAM has two main objectives : facilitate creating geometry and display images. Colours can be used in geometric construction. In this case,

State a algorithm that inputs the heights of all 500 student, As part of an...

As part of an experiment, a school measured heights (in metres) of all its 500 students. Write an algorithm, using a flowchart that inputs the heights of all 500 students and ou

Advantages of first in first out method, Advantages of First in First out (...

Advantages of First in First out (FIFO) Costing Advantages claimed for first in first  out (FIFO)  costing method are: 1. Materials used are drawn from the cost record in

Algorithm for binary search, Q. Write down the algorithm for binary search....

Q. Write down the algorithm for binary search. Which are the conditions under which sequential search of a list is preferred over the binary search?

Road transport booking system, what algorithms can i use for the above titl...

what algorithms can i use for the above title in my project desing and implmentation of road transport booking system

An undirected graph g with n vertices and e edges, An undirected graph G wi...

An undirected graph G with n vertices and e edges is shown by adjacency list.  What is the time required to generate all the connected components? O (e+n)

Basic organization of computer system, what happen''s in my computer when ...

what happen''s in my computer when i input any passage

Decision tree, . Create a decision table that describes the movement of inv...

. Create a decision table that describes the movement of inventory

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd