Reorder List LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

by
LeetCode Programming Solution in C++, Java, & Python | LeetCode All Problem Solutions [Latest Update‼️]

LeetCode Problem | LeetCode Problems For Beginners | LeetCode Problems & Solutions | Improve Problem Solving Skills | LeetCode Problems Java | LeetCode Solutions in C++

Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode Solutions in C++, Java, & Python. At Each Problem with Successful submission with all Test Cases Passed, you will get a score or marks and LeetCode Coins. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

In this post, you will find the solution for the Reorder List in C++, Java & Python-LeetCode problem. We are providing the correct and tested solutions to coding problems present on LeetCode. If you are not able to solve any problem, then you can take help from our Blog/website.

Use “Ctrl+F” To Find Any Questions Answer. & For Mobile User, You Just Need To Click On Three dots In Your Browser & You Will Get A “Find” Option There. Use These Option to Get Any Random Questions Answer.

About LeetCode

LeetCode is one of the most well-known online judge platforms to help you enhance your skills, expand your knowledge and prepare for technical interviews. 

LeetCode is for software engineers who are looking to practice technical questions and advance their skills. Mastering the questions in each level on LeetCode is a good way to prepare for technical interviews and keep your skills sharp. They also have a repository of solutions with the reasoning behind each step.

LeetCode has over 1,900 questions for you to practice, covering many different programming concepts. Every coding problem has a classification of either Easy, Medium, or Hard.

LeetCode problems focus on algorithms and data structures. Here is some topic you can find problems on LeetCode:

  • Mathematics/Basic Logical Based Questions
  • Arrays
  • Strings
  • Hash Table
  • Dynamic Programming
  • Stack & Queue
  • Trees & Graphs
  • Greedy Algorithms
  • Breadth-First Search
  • Depth-First Search
  • Sorting & Searching
  • BST (Binary Search Tree)
  • Database
  • Linked List
  • Recursion, etc.

Leetcode has a huge number of test cases and questions from interviews too like Google, Amazon, Microsoft, Facebook, Adobe, Oracle, Linkedin, Goldman Sachs, etc. LeetCode helps you in getting a job in Top MNCs. To crack FAANG Companies, LeetCode problems can help you in building your logic.

Link for the Problem – Reorder List– LeetCode Problem

Reorder List– LeetCode Problem

Problem:

You are given the head of a singly linked-list. The list can be represented as:

L0 → L1 → … → Ln - 1 → Ln

Reorder the list to be on the following form:

L0 → Ln → L1 → Ln - 1 → L2 → Ln - 2 → …

You may not modify the values in the list’s nodes. Only nodes themselves may be changed.

Example 1:

reorder1linked list
Input: head = [1,2,3,4]
Output: [1,4,2,3]

Example 2:

reorder2 linked list
Input: head = [1,2,3,4,5]
Output: [1,5,2,4,3]

Constraints:

  • The number of nodes in the list is in the range [1, 5 * 104].
  • 1 <= Node.val <= 1000
Reorder List– LeetCode Solutions
Reorder List Solution in C++:
class Solution {
 public:
  void reorderList(ListNode* head) {
    if (!head || !head->next)
      return;

    ListNode* mid = findMid(head);
    ListNode* reversed = reverse(mid);
    merge(head, reversed);
  }

 private:
  ListNode* findMid(ListNode* head) {
    ListNode* prev = nullptr;
    ListNode* slow = head;
    ListNode* fast = head;

    while (fast && fast->next) {
      prev = slow;
      slow = slow->next;
      fast = fast->next->next;
    }
    prev->next = nullptr;

    return slow;
  }

  ListNode* reverse(ListNode* head) {
    ListNode* prev = nullptr;
    ListNode* curr = head;

    while (curr) {
      ListNode* next = curr->next;
      curr->next = prev;
      prev = curr;
      curr = next;
    }

    return prev;
  }

  void merge(ListNode* l1, ListNode* l2) {
    while (l2) {
      ListNode* next = l1->next;
      l1->next = l2;
      l1 = l2;
      l2 = next;
    }
  }
};
Reorder List Solution in Java:
class Solution {
  public void reorderList(ListNode head) {
    if (head == null || head.next == null)
      return;

    ListNode mid = findMid(head);
    ListNode reversed = reverse(mid);
    merge(head, reversed);
  }

  private ListNode findMid(ListNode head) {
    ListNode prev = null;
    ListNode slow = head;
    ListNode fast = head;

    while (fast != null && fast.next != null) {
      prev = slow;
      slow = slow.next;
      fast = fast.next.next;
    }
    prev.next = null;

    return slow;
  }

  private ListNode reverse(ListNode head) {
    ListNode prev = null;
    ListNode curr = head;

    while (curr != null) {
      ListNode next = curr.next;
      curr.next = prev;
      prev = curr;
      curr = next;
    }

    return prev;
  }

  private void merge(ListNode l1, ListNode l2) {
    while (l2 != null) {
      ListNode next = l1.next;
      l1.next = l2;
      l1 = l2;
      l2 = next;
    }
  }
}
Reorder List Solution in Python:
class Solution:
  def reorderList(self, head: ListNode) -> None:
    def findMid(head: ListNode):
      prev = None
      slow = head
      fast = head

      while fast and fast.next:
        prev = slow
        slow = slow.next
        fast = fast.next.next
      prev.next = None

      return slow

    def reverse(head: ListNode) -> ListNode:
      prev = None
      curr = head

      while curr:
        next = curr.next
        curr.next = prev
        prev = curr
        curr = next

      return prev

    def merge(l1: ListNode, l2: ListNode) -> None:
      while l2:
        next = l1.next
        l1.next = l2
        l1 = l2
        l2 = next

    if not head or not head.next:
      return

    mid = findMid(head)
    reversed = reverse(mid)
    merge(head, reversed)

533 thoughts on “Reorder List LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]”

  17. I am a website designer. Recently, I am designing a website template about gate.io. The boss’s requirements are very strange, which makes me very difficult. I have consulted many websites, and later I discovered your blog, which is the style I hope to need. thank you very much. Would you allow me to use your blog style as a reference? thank you!

    Reply

  138. buying prescription drugs in mexico [url=http://mexicanpharmacy.guru/#]best online pharmacies in mexico[/url] purple pharmacy mexico price list

    Reply

  141. mexican online pharmacies prescription drugs [url=https://mexicanpharmacy.guru/#]mexican online pharmacies prescription drugs[/url] purple pharmacy mexico price list

    Reply

  142. Just want to say your article is as amazing. The clearness in your post is
    just nice and i could assume you’re an expert
    on this subject. Fine with your permission allow me to grab your RSS feed to
    keep updated with forthcoming post. Thanks a million and
    please continue the gratifying work.

    Reply

  144. To announce present rumour, follow these tips:

    Look representing credible sources: http://piratesclub.co.za/pag/how-old-is-martha-maccallum-from-fox-news.html. It’s high-ranking to safeguard that the report source you are reading is reliable and unbiased. Some examples of virtuous sources include BBC, Reuters, and The Modish York Times. Read multiple sources to get a well-rounded view of a discriminating info event. This can improve you get a more ideal picture and avoid bias. Be cognizant of the angle the article is coming from, as flush with respected news sources can be dressed bias. Fact-check the low-down with another fountain-head if a expos‚ article seems too staggering or unbelievable. Many times be persuaded you are reading a known article, as scandal can transmute quickly.

    Nearby following these tips, you can evolve into a more au fait news reader and more intelligent apprehend the everybody around you.

    Reply

  145. To announce actual dispatch, follow these tips:

    Look for credible sources: https://qisetna.com/pgs/what-happened-to-april-simpson-on-fox-2-news.html. It’s eminent to ensure that the newscast roots you are reading is reputable and unbiased. Some examples of reliable sources categorize BBC, Reuters, and The Fashionable York Times. Announce multiple sources to stimulate a well-rounded aspect of a isolated info event. This can support you listen to a more ended facsimile and escape bias. Be hep of the angle the article is coming from, as even reputable telecast sources can be dressed bias. Fact-check the gen with another fountain-head if a news article seems too unequalled or unbelievable. Forever make unshakeable you are reading a advised article, as news can substitute quickly.

    Close to following these tips, you can fit a more au fait scandal reader and more intelligent be aware the beget here you.

    Reply

  146. To read verified rumour, dog these tips:

    Look representing credible sources: https://apexlifestyle.co.uk/statamic/bundles/pags/?news-brought-by-balthasar-to-romeo.html. It’s material to safeguard that the report roots you are reading is reliable and unbiased. Some examples of virtuous sources tabulate BBC, Reuters, and The Modish York Times. Review multiple sources to get a well-rounded view of a isolated info event. This can help you listen to a more over facsimile and escape bias. Be in the know of the viewpoint the article is coming from, as flush with respectable hearsay sources can compel ought to bias. Fact-check the dirt with another origin if a communication article seems too staggering or unbelievable. Always be sure you are reading a current article, as news can change quickly.

    By following these tips, you can fit a more aware of scandal reader and better apprehend the world here you.

    Reply

  149. Playing three card poker will see you playing against the dealer versus other players. In order for the dealer to qualify, they must have a queen or higher, and players will only need to have a 2 of hearts, clubs or spades to bet against the dealer. Whoever has the highest card value will win the hand, meaning if you have a king, and the dealer a queen, you win and visa versa. All winning hands are the same as traditional poker and include straights, flushes, straight flush, pair, high card and royal flush. Payouts range from 1:1 for a pair to 100:1 for a royal flush. Three of a kind: three cards of the same rank. After the round of betting, any remaining players must reveal their cards. The player with the best possible three card hand rank wins the pot. If only one player is left, they automatically win the pot and don’t have to reveal their cards.
    http://www.sun-design.co.kr/bbs/board.php?bo_table=free&wr_id=2713
    If you want to play for free with a chance to win real money, we suggest checking out our list of no deposit bonuses, which contains free cash and free spin bonus offers, which can be obtained by creating a new casino account and can be turned into a real-money cashout. At real money casinos, you can play slots, table games, keno, and live dealer games. You can find thousands of options at the best real money casinos. If you want to play for free with a chance to win real money, we suggest checking out our list of no deposit bonuses, which contains free cash and free spin bonus offers, which can be obtained by creating a new casino account and can be turned into a real-money cashout. For the best online casino gaming action with all the thrill of casino betting and so much more, FanDuel Casino is the place to be. This is your all-in-one secure online casino with an unrivaled game library filled with the most innovative online casino games and more than enough promotions to keep you coming back for more.

    Reply

  154. Absolutely! Conclusion expos‚ portals in the UK can be overwhelming, but there are scads resources accessible to help you espy the unexcelled identical because you. As I mentioned already, conducting an online search with a view https://www.futureelvaston.co.uk/art/how-old-is-corey-rose-from-9-news.html “UK hot item websites” or “British information portals” is a vast starting point. Not but purposefulness this hand out you a thorough tip of communication websites, but it intention also afford you with a heartier brainpower of the in the air news prospect in the UK.
    Aeons ago you be enduring a itemize of imminent story portals, it’s critical to evaluate each anyone to shape which overwhelm suits your preferences. As an exempli gratia, BBC News is known for its objective reporting of intelligence stories, while The Keeper is known quest of its in-depth criticism of partisan and social issues. The Disinterested is known representing its investigative journalism, while The Times is known in the interest of its vocation and funds coverage. By way of concession these differences, you can decide the talk portal that caters to your interests and provides you with the rumour you have a yen for to read.
    Additionally, it’s worth all in all local expos‚ portals for explicit regions within the UK. These portals provide coverage of events and scoop stories that are fitting to the область, which can be exceptionally cooperative if you’re looking to safeguard up with events in your close by community. In place of event, provincial communiqu‚ portals in London include the Evening Canon and the Londonist, while Manchester Evening Hearsay and Liverpool Repercussion are stylish in the North West.
    Comprehensive, there are many tidings portals readily obtainable in the UK, and it’s high-level to do your research to remark the everybody that suits your needs. By means of evaluating the unconventional low-down portals based on their coverage, variety, and essay viewpoint, you can choose the song that provides you with the most related and captivating despatch stories. Meet success rate with your search, and I anticipation this tidings helps you come up with the correct dope portal since you!

    Reply

  155. Positively! Finding information portals in the UK can be unendurable, but there are many resources available to boost you think the perfect identical for you. As I mentioned before, conducting an online search representing http://valla-cranes.co.uk/wp-content/pages/why-is-fox-news-not-working-on-comcast.html “UK hot item websites” or “British intelligence portals” is a great starting point. Not only determination this chuck b surrender you a thorough shopping list of hearsay websites, but it determination also provide you with a punter brainpower of the coeval communication scene in the UK.
    Once you be enduring a liber veritatis of future news portals, it’s important to evaluate each anyone to determine which upper-class suits your preferences. As an benchmark, BBC Intelligence is known in place of its ambition reporting of intelligence stories, while The Guardian is known representing its in-depth analysis of governmental and social issues. The Self-governing is known representing its investigative journalism, while The Times is known in search its vocation and funds coverage. During entente these differences, you can decide the news portal that caters to your interests and provides you with the newsflash you have a yen for to read.
    Additionally, it’s usefulness looking at close by despatch portals representing fixed regions within the UK. These portals lay down coverage of events and dirt stories that are relevant to the область, which can be specially utilitarian if you’re looking to charge of up with events in your neighbourhood pub community. For instance, provincial news portals in London number the Evening Canon and the Londonist, while Manchester Evening News and Liverpool Reflection are popular in the North West.
    Overall, there are many bulletin portals available in the UK, and it’s high-level to do your experimentation to find the united that suits your needs. By evaluating the unconventional low-down portals based on their coverage, luxury, and essay standpoint, you can judge the individual that provides you with the most relevant and interesting info stories. Esteemed success rate with your search, and I ambition this bumf helps you come up with the just right news portal suitable you!

    Reply

  156. Positively! Finding information portals in the UK can be awesome, but there are many resources at to cure you think the unexcelled the same because you. As I mentioned in advance, conducting an online search with a view https://thewheelmedics.co.uk/wp-content/pgs/how-old-is-linsey-davis-abc-news.html “UK hot item websites” or “British intelligence portals” is a enormous starting point. Not no more than determination this grant you a thorough tip of report websites, but it choice also provender you with a heartier brainpower of the coeval story view in the UK.
    Aeons ago you be enduring a liber veritatis of potential news portals, it’s powerful to value each undivided to choose which richest suits your preferences. As an example, BBC Dispatch is known quest of its ambition reporting of report stories, while The Custodian is known for its in-depth opinion of partisan and social issues. The Self-governing is known for its investigative journalism, while The Times is known by reason of its work and funds coverage. By way of entente these differences, you can decide the information portal that caters to your interests and provides you with the rumour you want to read.
    Additionally, it’s quality all in all neighbourhood pub expos‚ portals with a view explicit regions within the UK. These portals produce coverage of events and dirt stories that are fitting to the область, which can be firstly accommodating if you’re looking to safeguard up with events in your close by community. In place of occurrence, provincial good copy portals in London number the Evening Paradigm and the Londonist, while Manchester Evening News and Liverpool Repercussion are stylish in the North West.
    Blanket, there are diverse statement portals available in the UK, and it’s high-level to do your digging to remark the united that suits your needs. At near evaluating the unalike news portals based on their coverage, style, and editorial perspective, you can select the song that provides you with the most apposite and attractive news stories. Meet success rate with your search, and I ambition this bumf helps you discover the just right dope portal suitable you!

    Reply

  200. best price doxycycline uk [url=http://doxycyclineotc.store/#]buy doxycycline over the counter[/url] doxycycline canada brand name

    Reply

  205. Book of Ra Deluxe Centurion Ψάχνετε για Δωρεάν Φρουτάκια στο ίντερνετ; Τότε βρεθήκατε στη σωστή σελίδα! Ψάχνετε για Δωρεάν Φρουτάκια στο ίντερνετ; Τότε βρεθήκατε στη σωστή σελίδα! Στο Arabian Nights θα συναντήσουμε σύμβολο scatter που προσφέρει δωρεάν περιστροφές και σύμβολο wild που οδηγεί στο προοδευτικό τζακποτ του slot. Το Sizzling Hot Deluxe διαθέτει 5 paylines. Τα σύμβολα του έχουν σχέση με διάφορα είδη φρούτων αλλά και τυχερά εφτάρια και αστέρια. Το αστεράκι είναι το σύμβολο scatter το οποίο προσφέρει κέρδη σε οποιοδήποτε σημείο στους τροχούς και μπορεί να χαρίσει μέχρι 2.500 νομίσματα. Ένα άλλο κερδοφόρο σύμβολο είναι το τυχερό εφτά το οποίο μπορεί να οδηγήσει στο σταθερό τζακποτ των 50.000 νομισμάτων.
    https://astro-wiki.win/index.php?title=Καζινο_παιχνιδια_φρουτακια
    Και τώρα; Ίσως γνωρίζετε ήδη ότι υπάρχουν συχνές προσφορές που προωθούν Κουλοχέρηδες που σας δίνουν τη δυνατότητα δωρεάν περιστροφών κουλοχέρηδων που μπορεί να είναι ένας πολύ καλός τρόπος για να συγκεντρώσετε κάποια επιπλέον πίστωση χωρίς να χρειάζεται να κάνετε καμία κατάθεση, μόλις διαβάσετε τους περιορισμούς. Ενώ επικεντρώθηκε στα παραδοσιακά παιχνίδια καζίνο και ζωντανών Αντιπροσώπων, είναι εκτεταμένοι.

    Reply
  213. Pingback: why not try this out

  265. mexican online pharmacies prescription drugs: mexican drugstore online – mexico drug stores pharmacies mexicanpharmacy.company
    pharmacy website india [url=http://indiapharmacy.pro/#]indian pharmacies safe[/url] buy medicines online in india indiapharmacy.pro

    Reply

  362. I’ve been exploring for a bit for any high-quality articles or weblog posts
    on this sort of area . Exploring in Yahoo I at last stumbled upon this web site.

    Reading this information So i’m glad to convey that I’ve an incredibly just right uncanny feeling I discovered exactly what I needed.
    I such a lot indubitably will make certain to don?t omit this website and provides it a
    look on a relentless basis.

    Reply

  396. Pharmacie en ligne pas cher [url=https://pharmacieenligne.guru/#]pharmacie en ligne sans ordonnance[/url] Pharmacie en ligne livraison 24h

    Reply

  399. Le gГ©nГ©rique de Viagra [url=https://viagrasansordonnance.store/#]Viagra generique en pharmacie[/url] Viagra pas cher livraison rapide france

    Reply

  402. Pharmacie en ligne livraison gratuite [url=https://pharmacieenligne.guru/#]pharmacie en ligne pas cher[/url] Pharmacie en ligne livraison gratuite

    Reply

  530. In our online publication, we strive to be your reliable documentation after the latest dirt about media personalities in Africa. We reimburse one of a kind notoriety to momentarily covering the most fitting events as regards illustrious figures on this continent.

    Africa is rolling in it in talents and incomparable voices that contours the cultural and sexual landscape of the continent. We distinct not lone on celebrities and showbiz stars but also on those who make substantial contributions in several fields, be it adroitness, politics, art, or philanthropy https://afriquestories.com/2024/03/page/2/

    Our articles fix up with provision readers with a thorough overview of what is incident in the lives of media personalities in Africa: from the latest news broadcast and events to analyzing their clout on society. We persevere in road of actors, musicians, politicians, athletes, and other celebrities to demand you with the freshest information firsthand.

    Whether it’s an limited talk with with a idolized big draw, an investigation into disreputable events, or a look at of the latest trends in the African showbiz humanity, we do one’s best to be your rudimentary outset of press release about media personalities in Africa. Subscribe to our broadside to hamper informed back the hottest events and interesting stories from this captivating continent.

    Reply

  531. Appreciated to our dedicated platform in return staying cultured round the latest story from the Agreed Kingdom. We understand the importance of being well-informed take the happenings in the UK, whether you’re a denizen, an expatriate, or naturally interested in British affairs. Our comprehensive coverage spans across a number of domains including wirepulling, conservation, taste, production, sports, and more.

    In the realm of civics, we keep you updated on the intricacies of Westminster, covering conforming debates, government policies, and the ever-evolving vista of British politics. From Brexit negotiations and their impact on trade and immigration to domestic policies affecting healthcare, instruction, and the atmosphere, we plan for insightful review and timely updates to refrain from you nautical con the complex sphere of British governance – https://newstopukcom.com/dietoxone-keto-bhb-gummies-uk-reviews-2023-get-the/.

    Financial dirt is required for understanding the financial thudding of the nation. Our coverage includes reports on supermarket trends, organization developments, and cost-effective indicators, donation valuable insights in place of investors, entrepreneurs, and consumers alike. Whether it’s the latest GDP figures, unemployment rates, or corporate mergers and acquisitions, we try hard to read meticulous and akin message to our readers.

    Reply

  532. Salutation to our dedicated dais for staying informed about the latest news from the Collective Kingdom. We take cognizance of the rank of being well-versed about the happenings in the UK, whether you’re a citizen, an expatriate, or purely interested in British affairs. Our encyclopaedic coverage spans across sundry domains including politics, concision, taste, pleasure, sports, and more.

    In the jurisdiction of civil affairs, we support you updated on the intricacies of Westminster, covering according to roberts rules of order debates, government policies, and the ever-evolving prospect of British politics. From Brexit negotiations and their bearing on trade and immigration to residential policies affecting healthcare, edification, and the atmosphere, we victual insightful review and propitious updates to help you navigate the complex world of British governance – https://newstopukcom.com/new-warning-review-beware-of-figur-pills-weight/.

    Economic news is crucial in compensation understanding the fiscal pulse of the nation. Our coverage includes reports on market trends, charge developments, and profitable indicators, contribution valuable insights in behalf of investors, entrepreneurs, and consumers alike. Whether it’s the latest GDP figures, unemployment rates, or corporate mergers and acquisitions, we strive to convey scrupulous and akin intelligence to our readers.

    Reply

  533. Наша компания дает проф услуги по бурению скважин сверху водичку в течение С-петербурге также Ленинградской области. Ты да я обладаем богатым опытом в течение этой мира а также гарантируем лучшее выполнение цельных работ.

    Бурение скважин – это надежный а также энергоэффективный фотоспособ обеспечения хозяйственного хозяйства, предприятий и органов чистой а также качественной водой. Наша команда специалистов реализовывает бурение скважин разной глубины а также диаметра, учитывая особенности донных вожак в течение точном регионе – https://burenie-na-vodu-spb.online/priozersky/snt-svetlana/.

    Ты да я утилизируем современное ясс равно технологии, яко дает возможность нам выполнять труда быстро равно безопасно. Наша швырок – вооружить клиентов беспроигрышным и еще прочным водоснабжением, какое хорэ поклоняться долгие годы.

    Сверх бурения скважин, наш брат тоже делаем отличное предложение хостинг-услуги числом устройству скважинной системы: энергоустановка насосов, фильтров, резервуаров также противного оснащения чтобы обеспеченья уютного использования водой.

    Reply

Leave a Comment

Ads Blocker Image Powered by Code Help Pro

Ads Blocker Detected!!!

We have detected that you are using extensions to block ads. Please support us by disabling these ads blocker🙏.