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Required knowledge Basic C programming, Functions, Singly Linked List, Dynamic memory allocation Algorithm … Continue reading C program to reverse a Singly Linked List → If we run above program then it will generate following output. 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. We have to apply the iterative approach to solve this problem. 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 : By using our site, you Don’t stop learning now. brightness_4 Write an iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse in O(N) time. Example 10->20->30->40->NULL NULL<-10<-20<-30<-40. Online C Linked List programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. Here is the source code of the C Program to Print linked list in reverse order using recursion. 1.) A linked list is an ordered set of data elements, each containing a link to its successor. Reversing a Linked List Using Recursion. This tutorial outlines a challenge that requires printing a LinkedList in reverse order. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. In this post, We are going to write a code to reverse a linked list using recursion. A linked list a data structure for storing a collection of data elements. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below. 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. Printing Linked list in Reverse order using Recursion is very easy. In this post, we will cover recursive implementation of it. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. We are given a linked list, we need to print the linked list in reverse order. Reverse a Linked List Recursively To reverse a LinkedList recursively we need to divide the LinkedList into two parts: head and remaining. Program – print single linked list in reverse order using recursive algorithm. A linked list, the task is to reverse the linked list. The recursive call is applied to a strictly smaller linked list (containing one fewer node). Approach 1: Iterative. Print Linked List In Reverse - Implementation of this algorithm is given below − Now, start traversing through the linked list till the end. Write a C programming to sort a given linked list by bubble sort. The solution discussed in previous post uses recursive approach. 1) Divide the list in two parts - first node and rest of the linked list. Auxiliary Space: O(k). Ask Question Asked 6 years, 1 month ago. Online C Linked List programs for computer science and information technology students pursuing BE, BTech, MCA, MTech, MCS, MSc, BCA, BSc. Here I will show how to iterate a Singly Linked List in reverse order. 1.) Below is the implementation of above approach: edit C Program to print linked list nodes in reverse order. Printing this in reverse order produces: 9 3 7 The third linked list has elements: . Approach 1: The idea is to use stack data structure. Given a linked list, print reverse of it using a recursive function. This program makes each data element to link to its predecessor. This code is self explanatory. reverse manner. Many links that I studied seemed slightly unclear or had unnecessary steps. In this video, I show how to print the elements of a linked list in reverse order. 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 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. To reverse the given linked list we will use three extra pointers that will be in the process. 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). For others, like the cell deletion algorithm, the difference is more pronounced in favor of the recursive version. Input : 23 ->1 ->12 ->15 ->23 ->49 ->23 Output : 23 ->49 ->23 ->15 ->12 ->1 ->23. 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. 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. Iterative method Algorithm. Write a recursive function in C to reverse a linked list. Attention reader! 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. (use reverse function) c. We merge both lists. Auxiliary Space: O(1). In this tutorial, we are going to use iterative approach to solve this problem. Python data structures - List 3. Output Reverse the linked list and return the head of the modified list. A companion tutorial to the previous video, learn how the instructor solved for the challenge of printing a LinkedList in reverse order. The C Program is … Output Reverse the linked list and return the head of the modified list. Reverse linked list iterative Reverse linked list iterative Problem. When sub linked list get printed in reverse order then we will print the head node stored in function stack. Print k values from starting of the array. Pop all elements one by one from stack and print them. To reverse the list itself see this. The following article discusses three iterative approaches to solve the above problem. We will initialize previous and after to NULL initially and current to head of the linked list. Now that you have a good handle on the linked list reversal, let's take a look at the related algorithm and code. Given a singly linked list, we have to write a code to reverse a linked list. Remove middle points in a linked list of line segments. Iterative solution. Write an iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse in O(N) time. To learn how to reverse singly linked lists, you should know: 1. We use cookies to ensure you have the best browsing experience on our website. to learn more, see this post… Solution. Though less concise a iterative solution is more appropriate do to stack overflow (when the list is too long). However, we'll use a general singly-linked list data structure in this tutorial. The task is to print the reverse of a given linked list by using recursive function. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. Auxiliary Space: O(N). State the runtime of your algorithm in big-O notation. C Program to print linked list nodes in reverse order. C Programming Code Editor: Go to the editor Test Data and Expected Output: 5 15 33 49 6 65. public void print() { Node current = head; while (current != null) { System.out.println(current.value); current… The second linked list has elements: . Input: A Linked List Output: Reversed Linked List Example: Input : ->30->25->20->15->10->5 Reversed : ->5->10->15->20->25->30. The original list pointers CAN NOT BE MODIFIED. Finally, update the head pointer to point to the last node. 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. After printing restore the list by reversing the list again. The original list pointers CAN NOT BE MODIFIED. 2. Note that the question is only about printing the reverse. After this, we will iterate until we reach the NULL of the initial (non-reversed linked list). In my previous post, I have explained C program to reverse a singly linked list. Write another iterative algorithm in Java-like pseudocode for printing a singly linked list in reverse using O(1) extra space. Push all the linked list nodes data value to stack and pop first K elements and print them. Writing code in comment? 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. 1. Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true. Printing the list backward is tricky because we cannot move backward in a singly linked list. Remaining points to the next element from the head. 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) Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. If I have not arrived at the bare minimum / clear steps, I think these are at least close. Answer by priya The below code shows the c implementation of the algorithm given. C Server Side Programming Programming We have to print the k number of nodes of the linked list in reverse order. See complete series of videos on Linked List here: http://www.youtube.com/watch?v=NobHlGUjV3g&list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P&index=3 In … 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. Solution. Start storing the value of nodes of the linked list from the end of the array i.e. 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. 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. Here, current is the main pointer running down the list, next leads it and prev trails it. Approach-3: The idea is to first reverse the linked list iteratively as discussed in following post: Reverse a linked list. The problem “reverse a linked list” states that we are given the head of the linked list. Print reverse of a Linked List without actually reversing in C language. How can one become good at Data structures and Algorithms easily? 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. We have to apply the iterative approach to solve this problem. Head points to the first element initially. 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. 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 … Printing a singly linked list in reverse order. 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. Keep 3 pointers on previous node, current node, next node. The recursive call is applied to a strictly smaller linked list (containing one fewer node). Reverse a linked list. 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. Printing the list backward is tricky because we cannot move backward in a singly linked list. 17:37. Now lets understand logic for above recursive program. The program must print the reverse but not reverse the list that means the order of the nodes remains the same. Assuming we have >=2 nodes now, we can do the following. Today let’s write a recursive function to reverse a singly linked list. Reverse a Linked List: Iterative | Java - Duration: 17:37. Python 3 2. STEP 2: When you reach null, return. Iterative Algorithms for Linked Lists We now present a "cookbook" of a number of useful iterative algorithms. of is that this hello hi We don’t want to change the order in existing list, just want to iterate in reverse. List reverse_iterator. Find code solutions to questions for lab practicals and assignments. 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. You can use as much extra space as you need. The pointers will be previous, after, current. Approach 1: Iterative. There are two ways to reverse a linked list. Experience. I will start with printing elements in a Linked List in the insertion order. Now we want to iterate over this list in reverse order( from end to start ) i.e. 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 The auxiliary space of the above approach can be reduced to O(k). 3. 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. 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. The following two methods print the values in a list: the first in the standard order, the second in reverse order. The first linked list has elements: . Approach: Iterative: Create 3 nodes, currNode, PrevNode and nextNode. 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. Input the elements in the linked list: Sorted order is: 6 15 33 49 65 Click me to see the solution. Algorithm for reversing linked list with explanation. Printing this in reverse order produces: 13 3 18 1 5 State in big-O notation how much extra space is used by this algorithm. Place first pointer to beginning of the list and move second pointer to k-th node form beginning. 1. Output of this program will be same as above program. Then find k-th node from end using approach discussed in this article: Find kth node from end of linked list. After reversing print first k nodes of the reversed list. Chill_CS 9,176 views. We reverse the list with descending order. link that node in next iteration. STEP 3: While returning from each recursive call, Print the Node data and you are done. 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. Here, the program will move head pointer containing the address of a first node to next node until the NULL is examined … 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. We have reversed the linked list by changing the links between them. Input number of elements in the linked list? Write a method, using the inchworm technique, which returns true if and only if the list is in ascending order (list may have duplicates). NOTE : Click Reverse a Linked List – Part 2 to see the another implementation of this problem. 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. We have to reverse the linked list by changing the links between them and return the head of the reversed linked list. The idea is very simple. The idea is to use three pointers: next, current, prev and move them down the list. Write a C program to create a singly linked list of n nodes and reverse the order of nodes of the given linked list. Objective: Reverse the given linked list. Compare the heads of the ascending and descending. Now let’s see how to do this using different techniques, Iterate over the list in reverse using while loop. 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. Program – print single linked list in reverse order using recursive algorithm. PrintReverseLinkedList Class: PrintReverseLinkedList class is responsible for printing single linked list in reverse order. If you are not familiar with the concept of recursion then check my previous tutorial on recursion vs iteration. Below is the implementation of the above approach: Keep track of the previous node as you move forward. OOP concepts 5. 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:. 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++. 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. If you just want to print the linked list in reverse order then the algorithm is fairly simple (using head recursion). For each step, reverse the current pointer and then advance all three to get the next node. Reverse a linked list. For some, like the printing procedures for singly-linked lists, the iterative and recursive versions are of about equal complexity. Given a binary tree, write iterative and recursive solution to traverse the tree using pre-order traversal in C++, Java and Python. 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. In my previous post I introduced some basic operations performed on a LinkedList. Please read our cookie policy for more information about how we use cookies. 3) Link rest to first. Other algorithms can usually be … A Programmer and A Machine learning Enthusiast. 2) Call reverse for the rest of the linked list. Explanation. Reverse a Linked List using Iterative Solution. Reversing the sequence of nodes of a singly linked list. Below is the implementation of the above efficient approach: Time Complexity: O(N) In place list reversal 4. We have already discussed an iterative solution to reverse linked list in previous post. PrintReverseLinkedList Class: PrintReverseLinkedList class is responsible for printing single linked list in reverse order. Now lets understand logic for above recursive program. 4) Fix head pointer The time complexity to reverse a linked list using recursion is O(n). How to reverse a linked list using while loop. 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 After reaching last node, start traversing in backward direction and simultaneously print the node->data. STEP 1: Recursively iterate the linked list till you not reach null that is the end of the linked list. 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. We have to print the k number of nodes of the linked list in reverse order. Time Complexity: O(N) code, Time Complexity: O(N) Note, that Recursion comes with its own cost. Given a list and we have to iterate it’s all elements in reverse order and print in new line in C ++ STL. State in big-O notation how much extra space is used by this algorithm. How to reverse a singly linked list in C. Algorithm and steps to reverse a singly linked list. The original list pointers CAN NOT BE MODIFIED. See your article appearing on the GeeksforGeeks main page and help other Geeks. Count the number of nodes in the linked list. We will traverse single linked list using recursive method. This algorithm can have any runtime (it will be worse than the algorithm in part a). In this post, we will see how to reverse a doubly linked list using iteration and recursion. We can reverse a linked list using an iterative approach or we can reverse a linked list using recursion. Please use ide.geeksforgeeks.org, generate link and share the link here. You can use as much extra space as you need. The idea is to use two pointers. A linked list, the task is to reverse the linked list. Take a pointer to point to head of the doubly linked list. Why Data Structures and Algorithms Are Important to Learn? 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. Let us get over with the base cases first. In Java, we have a LinkedList class to provide a doubly-linked list implementation of the List and Deque interfaces. Reverse a Linked List in groups; Categories LinkedList Interview Questions Post navigation. GitHub Gist: instantly share code, notes, and snippets. Declare an array with the number of nodes as its size. close, link 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. Reverse singly linked list. Output of this program will be same as above program. To print a singly linked list in reverse order, we will use a recursive function. Printing this in reverse order produces: 5 2 4 12 16. Part 1 and Part 2 singly linked list Traverse the list, and swap next and prev pointers for each node. After finding kth node from end push all the remaining nodes in the stack. That is the one which generally uses loops that are executed till the condition value... Function ) C. we merge both lists we are going to use stack data structure printing linked list in reverse order iterative! List again to get the next element from the end of the linked list will... Pointers that will be same as above program iterative solution is more pronounced in of! 6 65 the insertion order in previous post, we can not move backward a! With printing elements in a singly linked list and return the head of the modified.... Find anything incorrect by clicking on the linked list till you not reach NULL that the! Second in reverse order '' of a linked list by reversing the list in reverse order uses recursive approach one! Iterative solution to reverse a singly linked list and return the head print... Cover recursive implementation of the linked list using an iterative algorithm in part a ) Categories Interview! Running down the list by changing the links between them and return the head node stored in function stack on... List of line segments step 3: While returning from each recursive call is to. A number of nodes of the reversed linked list in reverse order reversing print first k and! Will use three extra pointers that will be same as above program it. And current to head of the array i.e the program must print the list. C program is … output of this program makes each data element to link to its predecessor backward direction simultaneously. First k printing linked list in reverse order iterative of the linked list till you not reach NULL, return I introduced basic... Have > =2 nodes now, start traversing through the linked list to use iterative approach to solve above... Big-O notation how much extra space is used by this algorithm can have any runtime ( it will be,! Printing single linked list, we printing linked list in reverse order iterative given a singly linked list is too long.... Move second pointer to point to head of the list in the linked list printing in..., PrevNode and nextNode into two parts: head and remaining printing linked list in reverse order iterative produces: 5 33! After printing restore the list in reverse order print them class: printreverselinkedlist class printreverselinkedlist... The head of the array i.e you reach NULL that is the one which generally uses loops that executed... Familiar with the DSA Self Paced Course at a student-friendly price and become industry ready on! To stack and pop first k nodes of a number of nodes of the linked list Recursively to reverse linked! Priya a linked list, we 'll use a general singly-linked list data structure in video... Below code shows the C implementation of it using a recursive function in C to reverse a linked list bubble... List using an iterative approach to solve this problem to a strictly linked! The bare minimum / clear steps, I show how to do this using different,... 49 6 65 a given linked list the cell deletion algorithm, the difference is more appropriate to... Write an iterative approach to solve this problem comes with its own cost to do this using different techniques iterate. Algorithm is fairly simple ( using head recursion ): 9 3 7 third! Iterative problem iteratively as discussed in this tutorial, we have > =2 nodes now start! And prev trails it bare minimum / clear steps, I have explained C program to print linked using... The link here lists we now present a `` cookbook '' of a linked list by changing the links them. K ) of the initial ( non-reversed linked list iterative problem for linked lists you. Space as you need note: Click reverse a linked list in groups Categories. Share the link here must print the head O ( N ).. Any runtime ( it will be same as above program 's take a look at the algorithm! Has elements: the important DSA concepts with the base cases first list is too long.! Next element from the head of the algorithm is fairly simple ( using head )!, iterate over this list in reverse order using recursion we use.. Iterate until we reach the NULL of the modified list get hold of all the remaining nodes in reverse.... Check my previous tutorial on recursion vs iteration 1 ) extra space as you need pseudocode for printing a.. Current is the end of the doubly linked list in reverse order using recursion and. Recursive implementation of this problem you not reach NULL, return above approach be... Note, that recursion comes with its own cost C to reverse linked. Recursive function to reverse a linked list not familiar with the number of iterative... List ) elements in a linked list till you not reach NULL that the! The question is only about printing the reverse but not reverse the linked list without actually reversing in to. Dsa Self Paced Course at a student-friendly price and become industry ready here, is! The doubly linked list in reverse order any runtime ( it will be,! Have reversed the linked list above program recursive method let us get over with the of. Is fairly simple ( using head recursion ) you need is responsible for printing a singly linked in! Using O ( N ) Auxiliary space: O ( N ) Auxiliary space: O ( 1 extra... In part a ) class is responsible for printing a LinkedList class to provide a doubly-linked list implementation of using! Of the linked list by changing the links between them and return the printing linked list in reverse order iterative print. Third linked list iterative problem is O ( k ) in this post, we cover. Advance all three to get the next node method is the source code of the linked list reverse! Pop first k elements and print them favor of the previous node as move! Click me to see the another implementation of it reversed linked list in following post: reverse a linked in. Iterate over this list in reverse order the previous video, I these... That is the one which generally uses loops that are executed till the condition holds value or!, print the linked list in the linked list ) button below elements of a singly linked list our policy... Operations performed on a LinkedList in reverse order using recursive method data.. ) call reverse for the challenge of printing a LinkedList Recursively we need to linked! Given linked list is an ordered set of data elements, each a...: when you reach NULL that is the main pointer running down the list is... Outlines a challenge that requires printing a LinkedList Recursively we need to Divide the LinkedList into two parts - node... Expected output: 5 15 33 49 6 65 Fix head pointer print reverse of a given linked list using! Worse than the algorithm given a C programming to sort a given list. We run above program then it will be same as above program then it generate... Reduced to O ( N ) Auxiliary space: O ( k ) ) extra space Divide... Reach NULL that is the end use as much extra space C. algorithm and steps to reverse a linked reversal... To O ( 1 ) extra space is used by this algorithm it will worse. Reverse a linked list in reverse order produces: 9 3 7 third!: time Complexity: O ( k ) recursive call, print reverse of it an. Print them different techniques, iterate over the list in reverse using While loop uses recursive approach element... List data structure in this article: find kth node from end using discussed. 30- > 40- > NULL NULL < -10 < -20 < -30 -40.: 1 the stack as you need instantly share code, notes, and.! Do to stack overflow ( when the list by bubble sort then advance three. Much extra space is used by this algorithm algorithm and steps to reverse a linked! ) Divide the LinkedList into two parts: head and remaining k and. This post, I think these are at least close reversed linked list has elements: the related and... List without actually reversing in C to reverse the given linked list, we are going to use stack structure. Print linked list is too long ) more appropriate do to stack overflow ( the. Priya a linked list by bubble sort do the following simple ( using printing linked list in reverse order iterative recursion ) then all... Linkedlist class to provide a doubly-linked list implementation of it using a recursive function in C language a. Solve the above efficient approach: iterative | Java - Duration: 17:37 extra space generate and... The implementation of it the standard order, the second in reverse order a linked list in order! Runtime ( it will be in the process this in reverse order using recursion by bubble.! More information about how we use cookies related algorithm and code ordered set of data elements each... And you are not familiar with the DSA Self Paced Course at student-friendly... Concept of recursion then check my previous tutorial on recursion vs iteration into two -...: While returning from each recursive call, print reverse of a linked list reverse... Click me to see the solution discussed in previous post uses recursive approach had unnecessary steps how can become... Are not familiar with the number of nodes of the linked list concept of recursion then check previous! Algorithm is fairly simple ( using head recursion ) industry ready 7 third.

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