Solved

Non-recursive backtracking, using a stack

Posted on 2016-10-26
1
96 Views
Last Modified: 2016-11-08
Hi,

I was going through below link

http://www.cis.upenn.edu/~matuszek/cit594-2012/Pages/backtracking.html

what is difference between
Non-recursive backtracking, using a stack and
Non-recursive backtracking without using a stack

what is difference between
Non-recursive backtracking and recursive backtracking
please advise
0
Comment
Question by:gudii9
1 Comment
 
LVL 8

Accepted Solution

by:
James Bilous earned 500 total points
ID: 41860708
When you make recursive calls you are using a naturally occuring memory "call stack". This call stack is simply how your machine keeps track of functions that were previously called so that when you return, you can be placed back into the function where you left off. When you are using recursion to search a tree, you can exploit this naturally occuring stack to backtrack. Each recursive call to your function essentially keeps track of a single visit to a node in your tree.

When you don't use recursion, you have to use your own data structure called a Stack to emulate this behavior. The stack data structure will keep tabs of each node you visit rather than your function calls doing this for you in a recursive implementation.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Displaying an arrayList in a listView using the default adapter is rarely the best solution. To get full control of your display data, and to be able to refresh it after editing, requires the use of a custom adapter.
When we want to run, execute or repeat a statement multiple times, a loop is necessary. This article covers the two types of loops in Python: the while loop and the for loop.
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.

932 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now