This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. His understanding of the subject has greatly increased thanks to the platform's 1-on-1 live learning sessions with a qualified coach. This project is licensed under the MIT License - see the LICENSE.md file for details. GitHub - MSS023/Leetcode-solutions-python: Leetcode Solutions in python MSS023 / Leetcode-solutions-python Public 1 branch 0 tags 126 commits Failed to load latest commit information. to use Codespaces. You signed in with another tab or window. They might not be Meet my coach was a fantastic experience for my son, Dhruv. Until that happens, I certainly wont let Copilot fly my production codebases. Her unique learning demands have been met by the skilled and educated tutors' individualised education. Easiest Problem Ever in Codechef | Helping Chef | Python, Longest Substring Without Repeating Characters, Find the Index of the First Occurrence in a String, Substring with Concatenation of All Words, Find First and Last Position of Element in Sorted Array, Construct Binary Tree from Preorder and Inorder Traversal, Construct Binary Tree from Inorder and Postorder Traversal, Convert Sorted Array to Binary Search Tree, Convert Sorted List to Binary Search Tree, Populating Next Right Pointers in Each Node, Populating Next Right Pointers in Each Node II, 5 Tips To Beat the LeetCode Grind. At Upwork, we believe talent staffing should be easy. A tag already exists with the provided branch name. John was the first writer to have joined pythonawesome.com. Do you have a better explanation? For example: If any student is good at learning the words (Linguistic and verbal intelligence), the corresponding tutor with the same teaching style (Linguistic and verbal intelligence) is patched with that student. View Github He's already picked up a tonne, and it's encouraging to see him grow more certain in his new dancing moves. Please Wait Copilot Isn't Accurate With All LeetCode Solutions. I came to know about Meet My Coach through an online platform and decided to enroll my child. If so, please email me at kidpiano.cs@gmail.com! From having little knowledge, he has evolved to knowing how to dance. LeetCode-type questions are part of almost every programming interview or you can say every company interview, so every software developer should practice them before an interview. Cannot retrieve contributors at this time. Feel free to contact me for improvements . to use them as your referrences for logic of used algorithms and data structures. Satirist for controversial opinions. If nothing happens, download Xcode and try again. Please Longest Substring Without Repeating Characters, Substring with Concatenation of All Words, Find First and Last Position of Element in Sorted Array, Construct Binary Tree from Preorder and Inorder Traversal, Construct Binary Tree from Inorder and Postorder Traversal, Convert Sorted Array to Binary Search Tree, Convert Sorted List to Binary Search Tree, Populating Next Right Pointers in Each Node, Populating Next Right Pointers in Each Node II, Read N Characters Given Read4 II - Call multiple times, Longest Substring with At Most Two Distinct Characters, Add and Search Word - Data structure design, Lowest Common Ancestor of a Binary Search Tree, Verify Preorder Sequence in Binary Search Tree, Smallest Rectangle Enclosing Black Pixels, Best Time to Buy and Sell Stock with Cooldown, Number of Connected Components in an Undirected Graph, Verify Preorder Serialization of a Binary Tree, Longest Substring with At Most K Distinct Characters, Insert Delete GetRandom O(1) - Duplicates allowed, Longest Substring with At Least K Repeating Characters, Convert Binary Search Tree to Sorted Doubly Linked List, Minimum Number of Arrows to Burst Balloons, Random Point in Non-overlapping Rectangles, Longest Word in Dictionary through Deleting, Binary Tree Longest Consecutive Sequence II, Longest Line of Consecutive One in Matrix, Non-negative Integers without Consecutive Ones, Smallest Range Covering Elements from K Lists, Split Array into Consecutive Subsequences, Kth Smallest Number in Multiplication Table, Longest Continuous Increasing Subsequence, Maximum Sum of 3 Non-Overlapping Subarrays, Best Time to Buy and Sell Stock with Transaction Fee, Prime Number of Set Bits in Binary Representation, Preimage Size of Factorial Zeroes Function, Smallest Subtree with all the Deepest Nodes, Construct Binary Tree from Preorder and Postorder Traversal, Most Stones Removed with Same Row or Column, Numbers With Same Consecutive Differences, Flip Binary Tree To Match Preorder Traversal, Vertical Order Traversal of a Binary Tree, Minimum Number of K Consecutive Bit Flips, Check If Word Is Valid After Substitutions, Construct Binary Search Tree from Preorder Traversal, Pairs of Songs With Total Durations Divisible by 60, Partition Array Into Three Parts With Equal Sum, Binary String With Substrings Representing 1 To N, Maximum Difference Between Node and Ancestor, Maximum Sum of Two Non-Overlapping Subarrays, All Paths from Source Lead to Destination, Lexicographically Smallest Equivalent String, Flip Columns For Maximum Number of Equal Rows, Smallest Subsequence of Distinct Characters, Find K-Length Substrings With No Repeated Characters, The Earliest Moment When Everyone Become Friends, Maximum Nesting Depth of Two Valid Parentheses Strings, Check If a Number Is Majority Element in a Sorted Array, Swap For Longest Repeated Character Substring, Find Words That Can Be Formed by Characters, Compare Strings by Frequency of the Smallest Character, Count Substrings with Only One Distinct Letter, Reverse Substrings Between Each Pair of Parentheses, How Many Apples Can You Put into the Basket, Sort Items by Groups Respecting Dependencies, Remove All Adjacent Duplicates in String II, Minimum Moves to Reach Target with Rotations, Longest Arithmetic Subsequence of Given Difference, Replace the Substring for Balanced String, Find Positive Integer Solution for a Given Equation, Circular Permutation in Binary Representation, Maximum Length of a Concatenated String with Unique Characters, Tiling a Rectangle with the Fewest Squares, Find Elements in a Contaminated Binary Tree, Minimum Moves to Move a Box to Their Target Location, Thank you for anyone sharing invaluable ideas on discussions on Leetcode. The instructors' outstanding kindness and expertise have greatly benefited my child's development. The right guidance will help the child to grasp things better, and hence clear the high school exams. [https://leetcode.com/problems/majority-element/], trickyhashmapspace O(1) time O(n)majoritycandidatecandidateMajority, [https://leetcode.com/submissions/detail/43216705/], Q169majoritycandidatemajoritymajorityQ169candidatemajority candidatenumcandidate, https://leetcode.com/problems/divide-two-integers/, long long, https://leetcode.com/problems/permutation-sequence/, abcd(a-1)*3!+(b'-1)*2!+(c'-1)*1!+1b'c', [https://leetcode.com/problems/decode-ways/], sMM(s) = M(s.substr(1))+M(s.substr(2))s>=10<=26M(s.substr(1)) = M(s.substr(2))+M(s.substr(3))M(s.substr(2))cachehashtablecache, Leetcode12msO(n)4msO(1), abcdefgabcM(c) = M(a) + M(b)bc, [http://stackoverflow.com/questions/20342462/review-an-answer-decode-ways]. I feel itll take a while and a little mindset change to embrace the idea of an AI assistant glued in our workflows. The curriculum here is personalised for every child's specific interests. Three months ago, I enrolled my daughter Neha in the Meet My Coach robotics e-learning programme. I need to say, I'm impressed by the quality of the platform, the materials and the teaching staff. Hire the right Python Consultant for your project from Upwork, the world's largest work marketplace. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Thanks to hertutor, she is lot more confident and knowledgeable about physics. Github Copilot, the AI pair programming tool developed by OpenAI alongside Microsoft was a major talking point through the last year. At Vnaya this is strongly believed that the teachers must end up teaching children successfully to love learning. How to become 5 star coder in Leetcode? Parse the LeetCode questions using a Python script; . Nope, its up to you if you know how to solve then it is easy if you dont know then it would be difficult for you so it depends from person to person. My Leetcode Solutions All In One - LeetCode Discuss My Leetcode Solutions All In One 81 longluo 1666 Last Edit: November 29, 2022 3:09 AM 18.8K VIEWS By Frank Luo My Leetcode Solutions are here, and this post will update frequently. We provide targeted and highly personalized preparatory tutoring alongside prepping for SAT, ACT, PSAT and AP. In summary, GitHub Copilot does a phenomenal job in generating algorithmic code from natural language queries. Improve your English skills with Meet My Coach, an edtech platform that I recently had the chance to use. Note:-I compile all programs, if there is any case program is not working and showing an error please let me know in the comment section. This repository includes my solutions to all Leetcode algorithm questions. .gitignore README.md q1.ipynb q10.ipynb q1006.ipynb q1007.ipynb q1011.ipynb q1014.ipynb q102.ipynb q1029.ipynb q1038.ipynb q1046.ipynb q1048.ipynb q105.ipynb I was ecstatic to find about Meet My Coach, programme that pairs herwith competent teachers who help with hersubject-matter comprehension. Since they get to learn from a real live person, they are both really motivated to study. Modes of training include Instructor Led Live online training a From the Business : Turito offers personalised, all-inclusive learning for students holistic development & remarkable success where the individual learners needs are catered to while ensuring success. This is an repository for storring new algorithms that I am learning form the LeetCode for future use. praveenbommali / LeetCodeSolutions_.idea_LeetCodeSolutions.iml Created 4 years ago 0 Fork 0 Code Revisions 1 Download ZIP LeetCode Python Solutions Raw LeetCodeSolutions_.idea_LeetCodeSolutions.iml <? Algebra is a quite difficult to learn, when compared to the other branches of mathematics. Simran has always struggled with physics. She is quite happy with the curriculum which makes learning fun for her.She is doing really well in the subject. Python Awesome is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Finally, we are now, in the end, I just want to conclude some important message for you. xml version = "1.0" encoding = "UTF-8" ?> This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. My child's learning has been substantially aided by the instructors' exceptional patience and training. LeetCode is a good platform for practicing SQL Queries. Lets see how our AI buddy fares when solving LeetCode problems in Visual Studio Code (if you havent already, download the VS Code extension for GitHub Copilot). List of LeetCode solutions along with related topics. We are providing Instructor led live online classes with complete real time examples. A facilitator will be assigned to you to assist you in completing lab exercises and to help with any questions about the course content. All suggestions are welcome. Leetcode Python solutions About This repository includes my solutions to all Leetcode algorithm questions. The instructors are all exceedingly patient and well trained, which has greatly facilitated my child's learning. I was astounded by how knowledgeable and patient the coaches were with my child throughout the platform's 1-on-1 live sessions. We cater to individuals and corporates for IT training and certification program in Niche IT Courses. 12. This means that there is something for everyone, regardless of their skill level. Call us today to set up a free demonstration of our on-demand platform. Overall, I was really impressed with the platform and would heartily suggest it to anybody searching for a complete and user-friendly online learning option. My toddler has been captivated the entire time. Meet My Coach - Digital Platform For Online Learning. He absolutely enjoyed and found the robotics session to be fascinating. Its free, easy-to-use and smart! Taking a cue from this StackOverflow post, heres the code to parse LeetCode requests for problem statements using BeautifulSoup: For the sake of simplicity, weve printed the results in the console. However, you can always take it a step further by saving the data in a file (say a CSV). You signed in with another tab or window. In order to assist him comprehend maths ideas and succeed in his math studies, Vihaanmy son has truly valued the individualised attention he has received. Math has always been his favorite subject and the only problem he faced ever is not having proper attention of the teacher during classes. Meet My Coach - Digital Platform For Online E Tutors Zone A Robust Enrichment Program, Algebra Tutoring - Topmost Reasons to Get the Best Tutor. Parse the LeetCode questions using a Python script. Can you write the code cleaner? Learn more. What is SAT and what you should do before the exam? * ListNode(int x) : val(x), next(NULL) {}. We help students pursue their passion for learning. SAT is a standardized admission test conducted bythe College Board, a non-profit which also administers the PSAT and the AP (Advanced Placement) program. Our one-on-one live tutoring From the Business : Viswanathan Anand started playing Chess when he was 3 years. Explore is a well-organized tool that helps you get the most out of LeetCode by providing structure to guide your progress towards the next step in your programming career. Leetcode-solution. Strongly advised! It gives users access to premium problems and solutions, a built-in debugger, and interview simulations. This subject requires the most preparation during exams. mock session and resume preparation help. . Should I use it only when I need to StackOverflow? Seems like, we neednt parse LeetCode questions at all as Copilot can autogenerate the problem statement just by knowing the URL: Note: Relying on GitHub Copilot to autocomplete LeetCode problem statement based on URLs might not be a great idea as it can suggest a problem statement from other platforms like Hackerrank based on the training data it has. Not only has my child learned how to dance, but he is also learning vital life skills. I have a six year old son david who has been learning Tango for about 5 months. Their only option is to prepare smartly so yes we can say LeetCode is the best way to prepare for interviews. Annual Subscription $159.00. My child has been enthralled throughout the entire time due to the exceptional patience and training provided by the instructors. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'chase2learn_com-medrectangle-4','ezslot_12',846,'0','0'])};__ez_fad_position('div-gpt-ad-chase2learn_com-medrectangle-4-0');Please share our posts on social media platforms and also suggest to your friends toJoin Our Groups. with outstanding instructors who understand just where the students need assistance and direction. However, the speed at which Copilot generates an entire function is truly a revelation. Can I trust it to complete this module? He underwent an enlightening learning process. The way Coding teachers are able to hold my child's attention is commendable. With the assistance of a knowledgeable, private instructor, he has been able to study English, and hisinterest for the subject has significantly increased. Leetcode also provides solutions to problems so that participants can learn from their mistakes. The consent submitted will only be used for data processing originating from this website. I was extremely impressed with the platform and can confidently recommend it to anyone! I wholeheartedly recommend Meet my Coach if you want to teach your kids about robotics. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. The course includes thorough coverage of Python syntax, built in data types and control constructs. to use Codespaces. Or Im just gonna spend more time refactoring its bloated code suggestions? Refer to the CONTRIBUTING.md file for more details about the workflow. My child has been enthralled throughout the entire time due to their musicality, expertise, and high energy when teaching. I randomly tested a few other LeetCode problems with Copilot, and though it delivered the correct answer in most cases, there were a few misfired shots in-between especially on the more advanced problem sets. Learn more about bidirectional Unicode characters. Clone with Git or checkout with SVN using the repositorys web address. Using Copilot for the first time felt like being forced to work with an over-enthusiastic new developer whos looking to get the task done sometimes without thinking it through. I am astonished at how much he has learned in just a few months of training. You signed in with another tab or window. The programme is easy to use, and the instructors are capable and understanding. 1998-2023 Copyright Sulekha.com | All Rights Reserved. To review, open the file in an editor that reveals hidden Unicode characters. My Leetcode solutions (mostly in Python). So simple on the website Chase2learn you will get all Leetcode problem solutions. Using their 1-on-1 live platform, my son Steve has been studying salsa, and the results have been outstanding. From the Business : We are one of the best Software Training Institutes in Wilmington, DE. Welcome to meetmy.coach a participative ONLINE platform where students & coaches from all over the world meet & engage in an ONLINE immersive knowledge sharing. A tag already exists with the provided branch name. Meet my coach has been an incredible experience for my kid, Avyan. Leetcode also provides solutions to problems so that participants can learn from their mistakes. We specialize in Math help, Act prep, Math tutor, Act online prep, Online math tu My daughter ananya has been learning Kuchpudi using their 1-on-1 live platform, and the results have been fantastic. With one-on-one live sessions, it has proven to be a fantastic e-learning tool for improving his understanding of arithmetic subjects, Recommend. 5. Luckily, I was granted access to GitHub Copilot pretty quickly but had kept it on the back burner for far too long. What is the SAT? If you find my solutions hard to comprehend, give yourself a time to solve easier questions or check discussion section to problem on LeetCode. The course includes thorough coverage of Python syntax, built in data types and control constructs. highly recommended to anyone looking forward to learn from comfort of their house. He has advanced from having minimal knowledge to being able to dance. In addition to being able to receive excellent live 1-on-1 coaching from a qualified math coach, Vihaanalso able to do so on a platform that was incredibly user-friendly and simple to use. Digging a little deeper, I observed Copilot is well versed with the entire LeetCode solution repository. Human bot and a Debugger at Better Programming. For my daughter Inaya, I just got the chance to use the e-learning platform meet my coach. Manage Settings Students who lack industrial programming experience may elect to attend the introductory Learning to Program with Java course at no additional charge. I.e. Since our goal here is to feed LeetCode questions to Copilot, there are two ways to go about this: For the sake of writing some code ourselves, lets go with the second option. Their 1-on-1 live platform has been helping my son David learn tango, and the results have been excellent. Its by far the best AI tool for code suggestions and can truly amaze you when things pan out correctly. My friend referred me to enroll my child with Meet my coach. Whether I was looking to learn a new skill for work or simply wanted to expand my knowledge on a particular topic, I always found a course that fit my needs. Continue with Recommended Cookies. We had a great time, and I value the fact that my kids are learning something they like. A tag already exists with the provided branch name. Meet my coach is truly extraordinary. If nothing happens, download Xcode and try again. Freelance iOS dev. Itll certainly save our time spent copy-pasting StackOverflow solutions and give us the bandwidth to work on challenging tasks. Overall, I would highly recommend meetmy.coach to anyone looking for a high-quality, interactive, and convenient way to learn new skills or expand their knowledge. You signed in with another tab or window. LeetCode Premium is LeetCodes paid subscription, which currently costs$35/month or $159/year. Solve as many questions as you can. For providing this forum and helping my child with Chemistry, Meet My Coach has my sincere gratitude. Since my children, Hafsah and Asim, are robotics aficionados, we are quite grateful to have found Meet my Coach. I was blown away by how knowledgable and understanding the coaches were with my kid during the 1-on-1 live sessions that the platform offers. Refer to the CONTRIBUTING.md file for more details about the workflow. The individualised coaching that children receive is appreciated, and they are making good progress. Dial the business phone number shown here, Enter the pin number in your dial pad when asked, Text message cannot be sent to this number. Basically this problem is asking how many ways can you match each character of `t` to `s` with order not changed. Maximize learning with our unique on-demand streaming approach, featuring personal facilitation and dedicated hardware. Are you sure you want to create this branch? To review, open the file in an editor that reveals hidden Unicode characters. My youngster has been captivated during the entire session. Aditya, one among my children, has really loved using Meet My Coach to learn Chemistry. Add Digits LeetCode Solution Given an integer num, repeatedly add all its digits until the result has only one digit, Read More Remove Element LeetCode Solution Implemetations. The lessons are progressive and each new movement is well taught with instructions for leads, instruction for follows, and often additional refinement tips added after the basics are completed. This repository aims to provide code with good readability and consistent style over various topics and embraces new standards. Quick start Lets code! Meet My Coach not only resolves the issue but also they make him enjoy learning online with his concepts and doubts cleared on spot. Location: Courses may be taken at home or from the workplace, via a combination of on-demand video lectures and facilitated hands-on labs. Then you need a good coach. She has been receiving good grades, and I am delighted to see that she is acquiring the confidence and abilities essential for success. Our groundbreaking learning platform is known for quality online education, delivered by the best tutors, and onboarded after a rigorous vetting process. If nothing happens, download GitHub Desktop and try again. Coding Style and Naming. My kid has been really enthusiastic about learning to code, and when I told him about Meet My Coach, his enthusiasm increased. GitHub Instantly share code, notes, and snippets. We specialize in Java Online Course ,Selenium Online course, BA online training, QA online training, Python online training etc. It is not just about solving the questions, but students must understand the concepts as well. An example of data being processed may be a unique identifier stored in a cookie. The lessons are well structured and have a great pace. Does it scan the codebase on your local machine and provide suggestions to other users? Is LeetCode the best way to prepare for interviews? Concentration is all one needs while studying. Contributing Contributions are very welcome! 3. Install the VS Code extension for LeetCode and copy-paste the problem descriptions as comments in your code. Our unique approach combines on-demand streaming with personal facilitation and comprehensive hands-on exercises to assure successful training and competence in the IT workplace Our classes are designed to be 50% lecture and 50% hands on exercises. Revisions 1 [Leetcode] Two Sum - Python Raw solution.py class Solution: def twoSum ( self, nums: List [ int ], target: int) -> List [ int ]: for i in range ( len ( nums )): for j in range ( i+1, len ( nums )): a = nums [ i] + nums [ j] if ( a == target ): return [ i, j] return [ 0, 0] Sign up for free to join this conversation on GitHub . Is it a dependable tool for learning a new programming language? Attending Turitos courses comes with a guarantee of increasing the test prep score of aspirants. So, for the time being, lets test Copilot on a few popular programming problems from LeetCode. This problems mostly consist of real interview questions that are asked on big companies like Facebook, Amazon, Netflix, Google etc. To start off, Copilot needs some context to begin suggesting code. The Meet My Coach programme has been nothing short of amazing for me. Mr. Chatterbox (per school teacher)linktr.ee/anupamchugh. This is an repository for storring new algorithms that I am learning form the LeetCode for future use. Once the proposals start flowing in, create a shortlist of top Python Consultant profiles and interview. , Stick to Learning a Single Topic Each Week. It helps to give extra help to students who need it as well as for brilliant students to excel even further. But I decided to give meetmy.coach a try on the advice of a buddy, and I am far more than pleasantly surprised. Though, Id admit it did feel a little overwhelming initially with Copilot overseeing my working projects. * A bad but acceptable DP solution. The duration of the test is around 3 hours, without the essay or 3 hours 50 minutes, with the essay. We know that you will see the benefits of our self-paced training platform. Learn more about bidirectional Unicode characters, https://leetcode.com/problems/majority-element/, https://leetcode.com/submissions/detail/43216705/, https://leetcode.com/problems/decode-ways/, http://stackoverflow.com/questions/20342462/review-an-answer-decode-ways. As you already know that this site does not contain only theCodefchef solutionshere, you can also find the solution for other programming problems. Take the next step towards a better command of the English language today. The Meet My Coach programme has been nothing short of amazing for me. I was a little concerned about my child's ability to adjust to the online learning environment, but I'm glad to say that she has done just well! My child's learning has been substantially aided by the instructors' exceptional patience and training. Our unique approach combines on-demand streaming with personal facilitation and comprehensive hands-on exercises to assure successful training and competence in the IT workplace Our classes are designed to be 50% lecture and 50% hands on exercises . He has already learned a tremendous amount, and it has been inspiring to see him gain confidence in his new coding abilities. Leetcode Solutions in C++, Java, and Python. Every lesson I watch him make progress that is absolutely mind blowing. Leetcode,C programs,C++ Programs Solutions,Python Programs,Web Technology,Data Structures,RDBMS Programs,andJava Programs Solutions. Brittsoft is a software training & development center located in Wilmington, Delaware USA. I have been using Meet My Coach to teach my child how to salsa dance. I am ecstatic that we discovered Meet My Coach and warmly recommend it to anybody looking for an online tool for learning how to dance. As developers started getting off the waitlist, so did the mystery surrounding the new tool. LeetCode Solutions Solutions to LeetCode in C++17, Java, and Python. If you see an problem that you'd like to see fixed, the best way to make it happen is to help out by submitting a pull request implementing it. It makes it easy for her to understand the concept and then practice it to have a grip over the topic. Largest Number Greater Than Twice of Others, Longest Substring Without Repeating Characters, Find First and Last Position of Element in Sorted Array, Construct Binary Tree from Preorder and Inorder Traversal, Construct Binary Tree from Inorder and Postorder Traversal, Populating Next Right Pointers in Each Node, Populating Next Right Pointers in Each Node II, Convert Sorted Array to Binary Search Tree, Lowest Common Ancestor of a Binary Search Tree, Add and Search Word - Data structure design, Substring with Concatenation of All Words, Convert Sorted List to Binary Search Tree, Verify Preorder Serialization of a Binary Tree, Insert Delete GetRandom O(1) - Duplicates allowed, Longest Substring with At Least K Repeating Characters, Minimum Number of Arrows to Burst Balloons, Random Point in Non-overlapping Rectangles, Longest Word in Dictionary through Deleting, Non-negative Integers without Consecutive Ones, Smallest Range Covering Elements from K Lists, Split Array into Consecutive Subsequences, Kth Smallest Number in Multiplication Table, Longest Continuous Increasing Subsequence, Maximum Sum of 3 Non-Overlapping Subarrays, Best Time to Buy and Sell Stock with Transaction Fee, Prime Number of Set Bits in Binary Representation, Preimage Size of Factorial Zeroes Function, Minimum Swaps To Make Sequences Increasing, Smallest Subtree with all the Deepest Nodes, Construct Binary Tree from Preorder and Postorder Traversal, Employees Earning More Than Their Managers, Best Time to Buy and Sell Stock with Cooldown.