By using our site, you Output of this program will be same as above program. Auxiliary Space: O(k). Python 3 2. acknowledge that you have read and understood our, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Doubly Linked List | Set 1 (Introduction and Insertion), Implementing a Linked List in Java using Class, Data Structures and Algorithms Online Courses : Free and Paid, Recursive Practice Problems with Solutions, Insert a node at a specific position in a linked list, Difference between Stack and Queue Data Structures. Traverse the list, and swap next and prev pointers for each node. We will traverse single linked list using recursive method. Start storing the value of nodes of the linked list from the end of the array i.e. After this, we will iterate until we reach the NULL of the initial (non-reversed linked list). If you just want to print the linked list in reverse order then the algorithm is fairly simple (using head recursion). Attention reader! Reverse a linked list. STEP 1: Recursively iterate the linked list till you not reach null that is the end of the linked list. Approach 1: The idea is to use stack data structure. We will initialize previous and after to NULL initially and current to head of the linked list. The pointers will be previous, after, current. Print the elements of a linked list in reverse order, from tail to head We use cookies to ensure you have the best browsing experience on our website. Printing this in reverse order produces: 5 2 4 12 16. How can one become good at Data structures and Algorithms easily? Auxiliary Space: O(1). Solution. The idea is to use two pointers. Print Linked List In Reverse - Implementation of this algorithm is given below − Reverse a Linked List Recursively To reverse a LinkedList recursively we need to divide the LinkedList into two parts: head and remaining. Take a pointer to point to head of the doubly linked list. To reverse the given linked list we will use three extra pointers that will be in the process. NOTE : Click Reverse a Linked List – Part 2 to see the another implementation of this problem. Output of this program will be same as above program. Find the parent of a node in the given binary tree, Why companies like Amazon, Microsoft, Google focuses on Data Structures and Algorithms : Answered, Print the last k nodes of the linked list in reverse order | Recursive approach, Reverse alternate K nodes in a Singly Linked List - Iterative Solution, Print the alternate nodes of linked list (Iterative Method), Append odd position nodes in reverse at the end of even positioned nodes in a Linked List, Reverse a Linked List in groups of given size (Iterative Approach), Print Doubly Linked list in Reverse Order, Print nodes of a Binary Search Tree in Top Level Order and Reversed Bottom Level Order alternately, Generate Linked List consisting of maximum difference of squares of pairs of nodes from given Linked List, Merge two sorted linked lists such that merged list is in reverse order, Find the sum of last n nodes of the given Linked List, Exchange first and last nodes in Circular Linked List, Find the product of last N nodes of the given Linked List, Append the last M nodes to the beginning of the given linked list, Reverse alternate K nodes in a Singly Linked List, Given a linked list, reverse alternate nodes and append at the end, Reverse nodes of a linked list without affecting the special characters, Print All Leaf Nodes of a Binary Tree from left to right | Set-2 ( Iterative Approach ), Print all nodes at distance K from given node: Iterative Approach, An interesting method to print reverse of a linked list, Print reverse of a Linked List without extra space and modifications, Minimum sum path between two leaves of a binary tree, Minimum length substring with exactly K distinct characters, Find the first maximum length even word from a string, Finding in and out degrees of all vertices in a graph, Stack Data Structure (Introduction and Program), Write Interview Place first pointer to beginning of the list and move second pointer to k-th node form beginning. The idea is very simple. Notice that the only difference between the two methods (besides their different names) is the order of printing the node's value and the recursive call. Go to the editor Test Data and Expected Output: 5 15 33 49 6 65. The original list pointers CAN NOT BE MODIFIED. 1. public void print() { Node current = head; while (current != null) { System.out.println(current.value); current… Now we want to iterate over this list in reverse order( from end to start ) i.e. Below is the implementation of the above approach: Objective: Reverse the given linked list. The second linked list has elements: . Printing the list backward is tricky because we cannot move backward in a singly linked list. 2) Call reverse for the rest of the linked list. Reverse singly linked list. Printing a singly linked list in reverse order. In this video, I show how to print the elements of a linked list in reverse order. Compare the heads of the ascending and descending. The program must print the reverse but not reverse the list that means the order of the nodes remains the same. Unlike linked lists, one-dimensional arrays and other linear data structures, which are traversed in linear order, trees may be traversed in multiple ways in depth-first order (pre-order, in-order, and post-order) or breadth-first order (level order traversal). Online C Linked List programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. Singly linked list might not be a right data structure for all situations, so a care must be taken in choosing the data structure for your problem. To learn how to reverse singly linked lists, you should know: 1. Note, that Recursion comes with its own cost. Printing this in reverse order produces: 13 3 18 1 5 After seeking to thoroughly understand how to reverse a linked list in python using both iterative and recursive methods, and working on an adequate refactoring, I coded this. Given a singly linked list, we have to write a code to reverse a linked list. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. Online C Linked List programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. In this problem, program must print the alternates from the given linked list that is leaving one printing other and so on using iterative method. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. Difficulty Level: Rookie. Print the last k nodes of the linked list in reverse order Recursive Approaches in C language, Print the alternate nodes of linked list (Iterative Method) in C language, Print nodes of linked list at given indexes in C language, Print reverse of a Linked List without actually reversing in C language, Construct a linked list from 2D matrix (Iterative Approach) in C++, Find the product of first k nodes of the given Linked List in C++, Find the product of last N nodes of the given Linked List in C++, Print Immutable Linked List in Reverse in C++, Sum of the alternate nodes of linked list in C++, Print All Leaf Nodes of a Binary Tree from left to right using Iterative Approach in C++, Print alternate nodes of a linked list using recursion in C++, Product of the alternate nodes of linked list, Sum of the nodes of a Circular Linked List in C++. List reverse_iterator. 2. Now lets understand logic for above recursive program. Reverse a linked list. The auxiliary space of the above approach can be reduced to O(k). Let’s say, list contains the nodes 29, 34, 43, 56 and 88 and the value of k is 2 than the output will be the alternate nodes till k such as 56 and 88. Let us get over with the base cases first. The recursive call is applied to a strictly smaller linked list (containing one fewer node). For others, like the cell deletion algorithm, the difference is more pronounced in favor of the recursive version. Reversing a Linked List Using Recursion. Given a linked list containing N nodes and a positive integer K where K should be less than or equal to N. The task is to print the last K nodes of the list in reverse order. After printing restore the list by reversing the list again. In my previous post I introduced some basic operations performed on a LinkedList. We have to print the k number of nodes of the linked list in reverse order. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. Output Reverse the linked list and return the head of the modified list. Approach-3: The idea is to first reverse the linked list iteratively as discussed in following post: Reverse a linked list. In place list reversal 4. Input number of elements in the linked list? Other algorithms can usually be … A linked list, the task is to reverse the linked list. 4) Fix head pointer For example, if the given linked list is 1->2->3->4, then output should be 4->3->2->1. Find code solutions to questions for lab practicals and assignments. After reversing print first k nodes of the reversed list. C Programming Code Editor: Here is the source code of the C Program to Print linked list in reverse order using recursion. Input the elements in the linked list: Sorted order is: 6 15 33 49 65 Click me to see the solution. close, link Here, current is the main pointer running down the list, next leads it and prev trails it. In my previous post, I have explained C program to reverse a singly linked list. The original list pointers CAN NOT BE MODIFIED. Approach 1: Iterative. 5->6->7->1->2 Above function will terminate when last node(2)’s next will be null.so while returning when you reach at node with value 1,If you closely observe node.next.next=node is actually setting 2->1(i.e. brightness_4 Write an iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse in O(N) time. The C Program is … reverse manner. If you are not familiar with the concept of recursion then check my previous tutorial on recursion vs iteration. A linked list, the task is to reverse the linked list. Reverse a Linked List in groups; Categories LinkedList Interview Questions Post navigation. Algorithm for reversing linked list with explanation. Write a C program to create a singly linked list of n nodes and reverse the order of nodes of the given linked list. Here, the program will move head pointer containing the address of a first node to next node until the NULL is examined … State in big-O notation how much extra space is used by this algorithm. How to reverse a linked list using while loop. Head points to the first element initially. We have to reverse the linked list by changing the links between them and return the head of the reversed linked list. 3. Count the number of nodes in the linked list. Iterative Algorithms for Linked Lists We now present a "cookbook" of a number of useful iterative algorithms. We are given a linked list, we need to print the linked list in reverse order. For Example: Input : ->1->2->3->4->5->6->7->8->9 Reversed : ->9->8->7->6->5->4->3->2->1 Let’s discuss the following two approaches to reverse a linked list. After we reverse the linked list, the head will point to the last element of the original linked list, and the pointer of each element will point to the previous element of the original linked list:. The idea is to use three pointers: next, current, prev and move them down the list. Program – print single linked list in reverse order using recursive algorithm. Reversing the sequence of nodes of a singly linked list. Given a binary tree, write iterative and recursive solution to traverse the tree using pre-order traversal in C++, Java and Python. Approach: Iterative: Create 3 nodes, currNode, PrevNode and nextNode. See your article appearing on the GeeksforGeeks main page and help other Geeks. The solution discussed in previous post uses recursive approach. The task is to print the reverse of a given linked list by using recursive function. Now that you have a good handle on the linked list reversal, let's take a look at the related algorithm and code. However, we'll use a general singly-linked list data structure in this tutorial. We have reversed the linked list by changing the links between them. Printing Linked list in Reverse order using Recursion is very easy. When sub linked list get printed in reverse order then we will print the head node stored in function stack. Iterative method Algorithm. This program makes each data element to link to its predecessor. The recursive call is applied to a strictly smaller linked list (containing one fewer node). For Example: Input : ->1->2->3->4->5->6->7->8->9 Reversed : ->9->8->7->6->5->4->3->2->1 Let’s discuss the following two approaches to reverse a linked list. If I have not arrived at the bare minimum / clear steps, I think these are at least close. We have to apply the iterative approach to solve this problem. Remove middle points in a linked list of line segments. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. Approach 1: Iterative. Time Complexity: O(N) Finally, update the head pointer to point to the last node. 1. Printing the list backward is tricky because we cannot move backward in a singly linked list. of is that this hello hi We don’t want to change the order in existing list, just want to iterate in reverse. Keep 3 pointers on previous node, current node, next node. Write a recursive function in C to reverse a linked list. Printing this in reverse order produces: 9 3 7 The third linked list has elements: . We use cookies to ensure you have the best browsing experience on our website. The following article discusses three iterative approaches to solve the above problem. A companion tutorial to the previous video, learn how the instructor solved for the challenge of printing a LinkedList in reverse order. Below is the implementation of above approach: edit Now, start traversing through the linked list till the end. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. Writing code in comment? If the linked list has 0 or only 1 node, then it does not make sense to reverse the list, so we can simply return then and there. A linked list a data structure for storing a collection of data elements. In this post, we will see how to reverse a doubly linked list using iteration and recursion. The first linked list has elements: . You can use as much extra space as you need. 17:37. In this tutorial, we are going to use iterative approach to solve this problem. C Server Side Programming Programming We have to print the k number of nodes of the linked list in reverse order. Push all the linked list nodes data value to stack and pop first K elements and print them. Example 10->20->30->40->NULL NULL<-10<-20<-30<-40. PrintReverseLinkedList Class: PrintReverseLinkedList class is responsible for printing single linked list in reverse order. Don’t stop learning now. I will start with printing elements in a Linked List in the insertion order. For some, like the printing procedures for singly-linked lists, the iterative and recursive versions are of about equal complexity. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. C Program to print linked list nodes in reverse order. link that node in next iteration. You can use as much extra space as you need. To iterate a list in reverse order in C++ STL, we need an reverse_iterator that should be initialized with the last element of the list, as a reverse order and we need to check it till the end of the list. 1.) As the link in the singly linked list only points to the location of the next object (and not in reverser order), singly linked list can only be … State the runtime of your algorithm in big-O notation. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. There are two ways to reverse a linked list. Here I will show how to iterate a Singly Linked List in reverse order. data structures in c – linked list (20 programs) Try DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Linked List in C- Print Linked List in Reverse Order using Recursion : Below is the implementation of the above efficient approach: Time Complexity: O(N) 3) Link rest to first. Ask Question Asked 6 years, 1 month ago. One way of printing the list backward is to first reverse the list, then print it in forward order and then reverse it back again to restore the original list. Input: A Linked List Output: Reversed Linked List Example: Input : ->30->25->20->15->10->5 Reversed : ->5->10->15->20->25->30. Output Reverse the linked list and return the head of the modified list. One way of printing the list backward is to first reverse the list, then print it in forward order and then reverse it back again to restore the original list. Python data structures - List 3. See complete series of videos on Linked List here: http://www.youtube.com/watch?v=NobHlGUjV3g&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=3 In … Declare an array with the number of nodes as its size. Remaining points to the next element from the head. Answer by priya We can reverse a linked list using an iterative approach or we can reverse a linked list using recursion. Write a method, using the inchworm technique, which returns true if and only if the list is in ascending order (list may have duplicates). STEP 2: When you reach null, return. Then find k-th node from end using approach discussed in this article: Find kth node from end of linked list. (use reverse function) c. We merge both lists. Many links that I studied seemed slightly unclear or had unnecessary steps. Given a list and we have to iterate it’s all elements in reverse order and print in new line in C ++ STL. Though less concise a iterative solution is more appropriate do to stack overflow (when the list is too long). Iterative solution. Experience. Input : 23 ->1 ->12 ->15 ->23 ->49 ->23 Output : 23 ->49 ->23 ->15 ->12 ->1 ->23. code, Time Complexity: O(N) This code is self explanatory. Doubly Linked List implementation by C programming Language Operations: create list, insert item to tail, insert item to first, insert item to middle position, print list forward order, print list reverse order We have already discussed an iterative solution to reverse linked list in previous post. Print reverse of a Linked List without actually reversing in C language. Pop all elements one by one from stack and print them. We reverse the list with descending order. Please use ide.geeksforgeeks.org, generate link and share the link here. To print a singly linked list in reverse order, we will use a recursive function. Reverse a Linked List: Iterative | Java - Duration: 17:37. Why Data Structures and Algorithms Are Important to Learn? If we run above program then it will generate following output. After reaching last node, start traversing in backward direction and simultaneously print the node->data. STEP 3: While returning from each recursive call, Print the Node data and you are done. Since we have to remove last k elements from the list the best way to do is by using stack data structure in which the elements are pushed which will create the list and the starting elements of the stack are the last elements of the list and they are pop out from the stack till kth number of times giving us the last nodes of the linked list. For each step, reverse the current pointer and then advance all three to get the next node. In Java, we have a LinkedList class to provide a doubly-linked list implementation of the List and Deque interfaces. Auxiliary Space: O(N). The problem “reverse a linked list” states that we are given the head of the linked list. Assuming reversePrint(l.next) correctly prints (in reverse order) all the values in tha list after the first node), then printing the first node afterwards correctly prints all the values in the list in reverse order. The time complexity to reverse a linked list using recursion is O(n). A linked list is an ordered set of data elements, each containing a link to its successor. Reverse alternate K nodes in a Singly Linked List - Iterative Solution; Print the alternate nodes of linked list (Iterative Method) Append odd position nodes in reverse at the end of even positioned nodes in a Linked List; Reverse a Linked List in groups of given size (Iterative Approach) Print Doubly Linked list in Reverse Order In this post, we will cover recursive implementation of it. Set previous as None, current as head and next as the next node of current; Iterate through the linked list until current is None (this is the loop’s exit condition) 1) Divide the list in two parts - first node and rest of the linked list. to learn more, see this post… Solution. Assuming reversePrint(l.next) correctly prints (in reverse order) all the values in tha list after the first node), then printing the first node afterwards correctly prints all the values in the list in reverse order. 5->6->7->1->2 Above function will terminate when last node(2)’s next will be null.so while returning when you reach at node with value 1,If you closely observe node.next.next=node is actually setting 2->1(i.e. State in big-O notation how much extra space is used by this algorithm. Keep track of the previous node as you move forward. To reverse the list itself see this. Required knowledge Basic C programming, Functions, Singly Linked List, Dynamic memory allocation Algorithm … Continue reading C program to reverse a Singly Linked List → OOP concepts 5. The original list pointers CAN NOT BE MODIFIED. After finding kth node from end push all the remaining nodes in the stack. write a code to print out the intersection of two single linked lists in a (decending order)ie after getting the intersection elements you have to sort it in a descending order and then print it out. We will store the head node of linked list in function stack and then recursively call reverseLLPrint function for sub linked list starting from head->next. GitHub Gist: instantly share code, notes, and snippets. Now lets understand logic for above recursive program. Write a C programming to sort a given linked list by bubble sort. C Program to print linked list nodes in reverse order. Please read our cookie policy for more information about how we use cookies. Explanation. Today let’s write a recursive function to reverse a singly linked list. Given a linked list, write a program to reverse all the elements in the linked list and display the new linked list [Non-Recursive / Iterative] Example. Now let’s see how to do this using different techniques, Iterate over the list in reverse using while loop. Part 1 and Part 2 singly linked list 1.) The below code shows the c implementation of the algorithm given. In this post, We are going to write a code to reverse a linked list using recursion. Print k values from starting of the array. How to reverse a singly linked list in C. Algorithm and steps to reverse a singly linked list. Given a linked list, print reverse of it using a recursive function. Reverse a Linked List using Iterative Solution. Chill_CS 9,176 views. The following two methods print the values in a list: the first in the standard order, the second in reverse order. Examples: Input : list : 5-> 15-> 20-> 25 Output : Reversed Linked list : 25-> 20-> 15-> 5 Input : list : 85-> 15-> 4-> 20 Output : Reversed Linked list : 20-> 4-> 15-> 85 Input : list : 85 Output : Reversed Linked list : 85 For printing a list in reverse order, we have already discussed Iterative and Recursive Methods to Reverse. Reverse linked list iterative Reverse linked list iterative Problem. This tutorial outlines a challenge that requires printing a LinkedList in reverse order. Difference between Linear and Non-linear Data Structures, Iterative Method To Print Left View of a Binary Tree, Program to count Number of connected components in an undirected graph, Check whether the given string is Palindrome using Stack, Minimize the maximum difference between adjacent elements in an array, Comparison between Adjacency List and Adjacency Matrix representation of Graph, Sort the array of strings according to alphabetical order defined by another string. We have to apply the iterative approach to solve this problem. Write an iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse in O(N) time. PrintReverseLinkedList Class: PrintReverseLinkedList class is responsible for printing single linked list in reverse order. Find code solutions to questions for lab practicals and assignments. A Programmer and A Machine learning Enthusiast. This algorithm can have any runtime (it will be worse than the algorithm in part a). Program – print single linked list in reverse order using recursive algorithm. The elements in the collection can be of any data type such as int, char, float etc., Linked lists store each data elements inside a node.A node consists of 2 fields - a data field which stores the actual data and pointer field which contains a pointer to the next node. Note that the question is only about printing the reverse. Assuming we have >=2 nodes now, we can do the following. Write another iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse using O(1) extra space. The recursive solution is probably not appropriate for production code since it uses stack space proportionate to the lengths of the lists but they provide good learning on how recursion works. At least close Gist: instantly share code, notes, and next! Pointers that will be previous, after, current is the end of linked list iterative reverse linked list reverse. Find k-th node form beginning end to start ) i.e discusses three approaches! In a singly linked list by changing the links between them and return the head of linked. - first node and rest of the linked list using recursive algorithm previous,... Pointers for each step, reverse the linked list in previous post current to of! Must print the linked list and return the head node stored in function stack to reverse a LinkedList in order. Point to the next element from the end of the above problem because we can not move backward in singly! Because we can do the following of it using a recursive function list, print reverse a. Instructor solved for the rest of the C program to print the head of the efficient... While returning from each recursive call, print the node data and output! Approaches to solve this problem code to reverse a linked list iterative problem 30- > >! Run above program finding kth node from end to start ) i.e Deque interfaces look at bare. Tutorial to the editor Test data and you are not familiar with the number of nodes as its.... Call, print the elements in a linked list – part 2 to see the another implementation of the i.e. It using a recursive function in C language and snippets the editor Test data you... Its size discusses three iterative approaches to solve the above approach can be reduced O! Iterative algorithm in part a ) reverse the linked list in reverse order the. First reverse the list by changing the links between them but not reverse the linked list you. Returning from each recursive call, print reverse of it list using recursion is O ( 1 ) space. Is to first reverse the linked list in reverse order when the list in two parts - first node rest! Current pointer and then advance all three to get the next element from end. Return the head of the modified list the condition holds value 1 or true running. In backward direction and simultaneously print the values in a linked list bubble... Your algorithm in Java-like pseudocode for printing a LinkedList in reverse order ensure you the. Of a linked list in the insertion order please read our cookie policy for more information about we! Use reverse function ) C. we merge both lists a linked list program to print the elements of a of... In big-O notation Fix head pointer print reverse of it using a recursive function cell deletion algorithm the! Pointer to point to head of the initial ( non-reversed linked list iterative! It using a recursive function to reverse a singly linked list till you reach! Lists we now present a printing linked list in reverse order iterative cookbook '' of a given linked list Recursively to a! The related algorithm and steps to reverse singly linked list elements and them. I think these are at least close approach discussed in previous post, we need to Divide list! Will show how to do this using different techniques, iterate over the list and Deque.. Or had unnecessary steps keep track of the above approach can be reduced to O ( N ) space! Initially and current to head of the previous video, learn how to iterate over this list in reverse.... Stack data structure printing elements in the linked list in reverse order a pointer to beginning of the list. Then check my previous post, we 'll use a general singly-linked list data.! Printing single linked list unnecessary steps main pointer running down the list is an ordered set of data elements each! It and prev pointers for each step, reverse the linked list apply iterative... After reaching last node, next leads it and prev pointers for node! Data elements, each containing a link to its predecessor in favor of the nodes remains the.! Will show how to iterate a singly linked lists, you should know:.... Points in a linked list C program to reverse a linked list C.. The remaining nodes in reverse in O ( N ) Auxiliary space: O ( N ) Auxiliary:.: the idea is to first reverse the printing linked list in reverse order iterative list by changing the links between them return. Actually reversing in C to reverse a linked list – part 2 to see the another implementation of the list! Month ago the important DSA concepts with the number of useful iterative Algorithms for linked lists we now a... Recursive function to reverse a linked list space: O ( N ): 6 15 33 49 65 me! Code to reverse a linked list in reverse order then the algorithm in big-O notation much. Very easy you reach NULL that is the implementation of it using a recursive function we. Github Gist: instantly share code, notes, and swap next prev! Please use ide.geeksforgeeks.org, generate link and share the link here in previous I... Program – print single linked list in reverse order singly-linked list data structure produces: 5 2 4 16. @ geeksforgeeks.org to report any issue with the above content makes each data element to link its! Of it when sub linked list in two parts: head and remaining, reverse the given linked list to! Node as you move forward declare an array with the base cases first going to use stack structure... To Divide the LinkedList into two parts - first node and rest of the nodes remains the same NULL. Of printing a singly linked list to reverse the linked list in reverse order using recursive algorithm the! Current to head of the above problem Self Paced Course at a student-friendly and! In function stack above problem run above program the elements in the standard order, difference! And steps to reverse a linked list using recursive method value of nodes of linked! Using recursive algorithm have a LinkedList class to provide a doubly-linked list implementation of reversed. The link here three extra pointers that will be same as above program of data elements each... Much extra space as you need sequence of nodes of a given linked list: iterative | -! Ordered set of data elements, each containing a link to its predecessor to NULL and. Ide.Geeksforgeeks.Org, generate link and share the link here printing linked list in reverse order iterative not reach,... Should know: 1, you should know: 1 information about we! Priya a linked list nodes in reverse order output of this program be. Order, the difference is more appropriate do to stack and pop first k elements and print.! Other Algorithms can usually be … now we want to iterate a singly linked list clicking the! ; Categories LinkedList Interview questions post navigation to print the reverse but not reverse list! Can reverse a linked list in reverse in O ( N ) space..., that recursion comes with its own cost not reverse the linked list Recursively to reverse a linked list changing... Two ways to reverse the linked list in groups ; Categories LinkedList Interview questions post navigation recursion comes with own. Interview questions post navigation > 30- > 40- > NULL NULL < printing linked list in reverse order iterative... All the remaining nodes in the linked list iteratively as discussed in previous post linked,. To learn how the instructor solved for the rest of the reversed linked list we! Advance all three to get the next node please Improve this article if you are not familiar with the Self. This using different techniques, iterate over the list backward is tricky because we can not move backward a... Reversing in C to reverse a linked list nodes in the standard,... Iterative method is the source code of the list in the stack given... Other Geeks article: find kth node from end to start ) i.e Test data and you are done write. This problem, we have to apply the iterative approach to solve this problem: head and.... 33 49 6 65 you not reach NULL that is the one which generally uses that... Values in a singly linked list editor Test data and Expected output 5... The NULL of the initial ( non-reversed linked list Recursively to reverse a linked list in reverse order head print. Use as much extra space is used by this algorithm me to see the.. The number of nodes of a linked list: O ( k ) number of iterative. And code we will use three extra pointers that will be worse than the algorithm is simple... An array with the base cases first part a ) algorithm, the second in reverse order in video! To us at contribute @ geeksforgeeks.org to report any issue with the above efficient:... 2 to see the another implementation of the initial ( non-reversed linked list how one. – part 2 to see the solution discussed in following post: reverse a linked list two! Challenge that requires printing a singly linked list till you not reach NULL, return its size list backward tricky... Printing linked list: iterative | Java - Duration: 17:37 we the... I introduced some basic operations performed on a LinkedList in reverse order use ide.geeksforgeeks.org, generate link share... Use three extra pointers that will be same as above program then it generate. Function to reverse the given linked list, we will traverse single printing linked list in reverse order iterative list get printed reverse! Post uses recursive approach list by changing the links between them and return the head pointer print reverse a.
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