Two pointers leetcode. Introduction Two pointers ques...

Two pointers leetcode. Introduction Two pointers questions' goal is to find an optimal solution, e. Level up your coding skills and quickly land a job. Our platform offers a range of essential problems for practice, as well as the latest questions being One of these approaches goes by Two-Pointers and is the subject of this video. The approach in this video will help you solve a wide range of LeetCode style int Recursive Backtracking - DSA Course in Python Lecture 14 Data Structure and Algorithm Patterns for LeetCode Interviews – Tutorial Master Two Pointers & Sliding Window Techniques Solve 25+ handpicked LeetCode problems using two of the most powerful patterns in DSA. Use this as a checklist or a guide to Can you solve this real interview question? Intersection of Two Arrays - Given two integer arrays nums1 and nums2, return an array of their intersection. Using a temporary array is straightforward but consumes O (N) Contribute to Siddu-Biradar/Leetcode development by creating an account on GitHub. com/problems/two-sum-iv-input-is-a-bst/ Discover the nuances of using 'and' and 'or' conditions with the two pointers technique in LeetCode problems, demonstrated through merging two sorted lists. Mastering the 2-Pointers Approach: A Comprehensive Guide Step-by-Step Solutions to Boost Your Problem-Solving Skills In this article, we’ll solve Learn how to use two pointers technique to solve problems that involve iterating through a data set in a controlled way. It is automatically synced with my LeetCode submissions to reflect consistent problem-solving practice Level up your coding skills and quickly land a job. In this post, you will be going through 13 problems which kind Level up your coding skills and quickly land a job. We mentioned two scenarios to use the two-pointer technique: Two pointers starts at different position: one starts at the beginning while another starts at the end; Two Author: @wkw, @ColeB2 | https://leetcode. The Two Pointers technique is a fundamental approach used in many array and string problems. You may assume that each Level up your coding skills and quickly land a job. Aman's AI Journal | Course notes and learning material for Artificial Intelligence and Deep Learning Stanford classes. Includes The two-pointer technique is a widely used approach to solving problems efficiently, particularly scenarios involving arrays or linked There are more than 130/1300 problems in Leetcode that can be solved using two pointer approach. Master the keywords, problem types, and decision framework that separate fast solvers Master 41+ two pointers problems asked in technical interviews at Google, Amazon, Microsoft, Meta, Apple. This guide builds your intuition with diagrams, examples, and a The Two Pointers technique is an algorithmic pattern, primarily used with sorted arrays or linked lists. Solve Leetcode — Two Pointer Pattern In this blog, let’s dive deep into two pointer method and understand how it works with simple examples. I have solved more than 500+ questions on LeetCode and It involves placing two indices (pointers) at strategic positions (e. ⏩It improves thinking about window expansion and contraction. It involves using two pointers (variables that usually store array indices or node references) that The Two Pointers technique is an algorithmic pattern, primarily used with sorted arrays or linked lists. com/problems/permutation-in-string/ 0653 - Two Sum IV - Input is a BST (Easy) Author: @madhu915 | https://leetcode. -Main while loop while i >= 0 or j >= 0 -inner 2 while loops for each Two pointers show up everywhere on LeetCode, but many beginners memorize patterns without understanding why they work. io: https://neetcode. It involves using two pointers (variables that usually store array indices or node Two Pointers What is Two Pointers? Two Pointers is a technique used to iterate through a data structure, usually an array or linked list These pointers perform tasks such as searching, We have explained two pointer technique which is the optimal way to solve problems related to arrays in O(N) time. The idea would be to have one pointer for iterating the array and another pointer that just works on the non-zero elements of the array. In this guide, we'll cover the basics so that you know when and The Two Pointers pattern is a technique that uses two pointers to iterate through a data structure (usually an array or linked list) in a single pass. , start and end of a list) and moving them towards each other or in a specific manner to achieve a desired goal (e. Don’t forget to like, subscribe, and share this session if you found it helpful. Arrays-Two-Pointers-LeetCode-Challenges My solution to LeetCode Two-Pointers challenges This repository contains solutions to various LeetCode problems related to arrays and Two-Pointers. `j` expands the window to include larger elements. Our platform offers a range of essential problems for practice, as well as the latest questions being Level up your coding skills and quickly land a job. Here I will record all the useful information that I learned or gained from praticing LeetCode problems - BrandonBian/leetcode Each solution includes the problem-solving pattern used along with time and space complexity analysis for better understanding and interview readiness. "best time to buy & sell stock", "biggest volume of containers". The guide is organized into two main sections: first, how to recognize a two-pointers problem, and second, a The Two Pointer Approach is a powerful and efficient technique used to solve problems involving sorted arrays, searching, and optimization. Step by step code examples for all problems, tested on 100+ interview questions. Our platform offers a range of essential problems for practice, as well as the latest -Initiate 2 pointers, both at the end of each string. happening at University of New South Wales, Redfern, NS on Wed, 25 Feb, 2026 at 05:00 am AEDT. You can find a list here Master Your Interview Preparation with These 20 LeetCode Two Pointer Questions Background Lately, I’ve been grinding on LeetCode, specifically on two-pointer questions 🚀. Master the Two Pointers Pattern—one of the most powerful and efficient techniques in Data Structures & Algorithms (DSA). . We will start with a brute force solution Let's briefly review this technique. See examples, code, and suggested problems for practice. Learn all variants, when to use each pattern, complete templates in multiple languages, and a systematic Two Pointer 🚀| Summary with practice questions Sheet (C++) on LeetCode Hi, my name is Mahesh. This is the best place to expand your knowledge and get prepared for your next interview. We mentioned two scenarios to use the two-pointer technique: Two pointers starts at different position: one starts at the beginning while another starts at the 💥 Day 24/100 – Intersection of Two Linked Lists (LeetCode #160) Today’s challenge was about finding where two linked lists intersect — a problem that tests logical thinking and pointer Help with Two Pointer techniques Hello, I have been working with the Two Pointer pattern for the past few days and am struggling with identifying when to use Two Pointer is a classic technique used to solve coding interview problems. Use two pointers `i` and `j` to maintain a window: `i` points to the smallest element in the window. Learn all variants, when to use each pattern, complete templates in multiple languages, and a systematic approach to solve any two pointers The ultimate comprehensive guide to two pointers. Approach Two pointers, each starting from beginning and the end until they both meet One pointer moving at a slow pace, while the other pointer moves at twice the speed If two arrays, start pointer at Level up your coding skills and quickly land a job. The result should also be sorted in Acceptance Rate 41. org/developedbyed/Leetcode challengeshttps: Today I solve and explain all 3 Blind75 Two Pointer Pattern problems live in one sitting. Usually, the problems related to strings and arrays can be solved by brute force, which Find tickets & information for CSESoc LeetCode Workshop. Our platform offers a range of essential problems for practice, as well as the latest questions being Two-pointer is a quite common method used to solve Leetcode problems related to strings, arrays and linked lists. In this video, we break down the concept with clear examples, visual In summary, the two-pointer technique is a powerful and efficient method for solving the Two Sum problem, as well as many other problems involving pairs of In this video, I explain the Two Pointer Technique with a step-by-step solution to a LeetCode problem. g. Two Sum II - Input array is sorted which is related to Two Pointers. As the name suggests, the two-pointer approach can be used to help process two elements per loop, instead of just one. Day 33 of DSA Journey Solved Problem: Sort Colors 💻 Platform: LeetCode (Problem 75) 🧠 Topic: Arrays, Counting Sort, Two Pointers 📌 The Problem: Sort an array with objects colored red (0 The two pointers technique is a technique used to iterate through a data set, typically an array or a list, in a controlled way. Problems are categorized by patterns such as In this video, I'm going to show you how to solve Leetcode 167. The ultimate comprehensive guide to two pointers. 👇 Drop a 🧠 in the comments if this helped! Solution Explanation Since the array is sorted, we can use a two-pointer approach with pointers moving in opposite directions to find these two numbers. ), left and right pointers (binary search, array Join Brilliant using the link bellow for 30-day free trial + 20% off the premium subscription https://brilliant. Mastering the 2-Pointers Approach: A Comprehensive Guide Step-by-Step Solutions to Boost Your Problem-Solving Skills In this article, we’ll solve some Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. It can also be extended to multiple pointers across Let's briefly review this technique. This guide builds your intuition with diagrams, examples, and a The two-pointer technique is primarily used for traversing arrays, where two pointers point to different elements to collaborate on a task. Discover the power of the two-pointer technique in solving LeetCode problems! This guide explores how two pointers can optimize arrays, strings, and linked lists, Two pointers show up everywhere on LeetCode, but many beginners memorize patterns without understanding why they work. There are two An easy way to remember is a pointer points at another object. 1,849,053 / 2. 9M Acceptance Rate 64. This eliminates the need for nested loops or additional Two Pointers The Two Pointers technique is a fundamental and versatile approach used to Tagged with algorithms, datastructures, coding, LeetCode Meditations — Chapter 2: Two Pointers One of the techniques of iterating through an array is the two pointers technique, and it is as simple Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. ” The Two Pointers technique is a powerful strategy that enhances your ability 🚀 Must-Solve Two Pointers Questions on LeetCode Two Pointers is one of the most versatile and powerful techniques in algorithm design, especially when working Leetcode 150- Act II: Two Pointers 125. In fact, I also have a wh Arrays and Strings, coding interview preparation, Data Structures/ Leetcode, Leetcode Top 150, Two Pointer Technique [Problem Solving] Remove duplicates in a sorted array in-place The two pointer technique is a near necessity in any software developer's toolkit, especially when it comes to technical interviews. It involves using two pointers, one pointing to the beginning of the data set and The provided content is a comprehensive guide detailing strategies and tips for solving two-pointer problems on LeetCode, including understanding indicators for such problems, employing various In this video, I talk about the two pointers technique which is a very important DSA topic for coding interviews. 2. The guide is organized into two main sections: first, how to recognize a two-pointers problem, and second, a ranked discussion of the techniques and approaches—from the most frequently used In this guide, we'll start by understanding how the technique produces the efficient O(n) time-complexity solutions that those questions require (answer: by eliminating pairs). size () -1; // inside this only Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. There are many Leetcode problems you can solve with two pointer technique and its variations. ⏩It teaches how small optimizations change time 🚀 LeetCode Solutions This repository contains my accepted solutions to LeetCode problems. For the purpose of this article, a pointer is an index of an array. Welcome to the Two Pointers section of “Hands-On Problem-Solving in Python: Mastering the Blind 75 LeetCode Challenges. Popular and most classic Leetcode Two Pointer questions. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. From handling sorted arrays to dealing with duplicates, this guide provides a roadmap for mastering Here’s a list of important Two Pointers problems on LeetCode, curated with their strategies and direct links. LeetCode Problems solved in this video: Thanks for Watching! If you found this video helpful, check other Geekific One of the techniques of iterating through an array is the two pointers technique, and it is as Tagged with computerscience, algorithms, typescript, javascript. io/practice If you found this helpful A two-pointer approach could be helpful here. LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. The two-pointer technique I’m referring to here involves using two pointers that start at opposite ends of an array and gradually move towards each other before meeting in the middle. I'll then provide follow-up In this comprehensive guide, we delve into the realm of Two Pointers problem-solving on LeetCode. Each Find K Closest Elements - Given a sorted integer array arr, two integers k and x, return the k closest integers to x in the array. , find a pair summing Below is a detailed study guide that analyzes the Two Pointers problems from the collection. Depending on the difficulty, these pointers may go towards, In the competitive landscape of technical interviews, particularly on platforms like LeetCode, the journey from novice problem-solver to proficient coder requires more than a random assortment of Understanding Two Pointers in Python: Guide with LeetCode Tips & Tricks Two-pointers can definitely be tricky sometimes! I just want you to know that it’s completely normal to feel confused Let's briefly review this technique. The provided content is a comprehensive guide detailing strategies and tips for solving two-pointer problems on LeetCode, including understanding indicators for such problems, employing various In this video, I talk about the two pointers technique which is a very important DSA topic for coding interviews. In Coding Patterns series, we will try to recognize common patterns underlying behind each algorithm question, using real examples from Leetcode. This article summarizes all two-pointer techniques for arrays on LeetCode, including fast and slow pointers (in-place array modification, sliding window, etc. Practice 15 easy, 24 medium, and 2 hard two pointers The Two-Pointers Technique is a simple yet powerful strategy where you use two indices (pointers) that traverse a data structure - such as an array, list, or string - In this short, I break down the two pointers technique — a simple yet powerful method to optimize your code and ace those coding interviews. This kind of questions is based on the form of array or string. What I liked about this problem: ⏩ It strengthens understanding of two pointers. This blog explains the Array Two Pointer approach and covers a few questions from LeetCode that could be solved using the same. size() - 1; while (l < r) { // do some logic here if (/* condition */) { l += 1; } else { r -= 1 The two pointers technique optimizes array traversal by maintaining two index positions that move according to problem-specific rules. By utilizing two Level up your coding skills and quickly land a job. Instead of memorizing answers, I started asking: Which pattern fits this Level up your coding skills and quickly land a job. We mentioned two scenarios to use the two-pointer technique: Two pointers starts at different position: one starts at the beginning while another starts at the end; Two The two-pointer technique uses two pointers (or indices) that traverse the data at the same time. NeetCode. ” The Two Pointers technique is a powerful strategy that enhances your ability 🚀 Must-Solve Two Pointers Questions on LeetCode Two Pointers is one of the most versatile and powerful techniques in algorithm design, especially when working with arrays and strings. 2 % Array Two Pointers Remove Duplicates from Sorted Array Choose a type Sort by: Best Practice your Data Structures (CSCI 313) and Algorithms (CSCI 323) skills via hands-on technical interview problem practices with peer tutors at QC Learning A two-pointer approach could be helpful here. One pointer starts at the smallest element, on the # initialize two pointers left_pointer, right_pointer = 0, len (nums) - 1 # initialize result res = [] # while left_pointer does not meet right_pointer while (left_pointer <= right_pointer): Level up your coding skills and quickly land a job. The Tackle these top LeetCode problems and become a master of the Two Pointers technique. Valid Palindrome class Solution { public: bool isPalindrome (string s) { int left =0; int right = s. Register or Buy Tickets, Price Some of the most common tags include arrays, strings, two pointers, stacks, binary search, sliding windows, linked lists, trees, tries, backtracking, heaps, priority queues, graphs, breadth-first search, Let's briefly review this technique. Sliding window, two pointers, binary search, recursion, backtracking — these patterns repeat across multiple questions. What is the Two pointer method ? Two pointer Uhm when you have to compare/use 2 elements in array or string like naive approach would be using nested loops than time complexity will be to O (n 2) instead of that we will use a single loop to Two Sum - Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You'll learn:- What two pointers are- When and how to u Two Pointers results matching " " No results matching " " Can you solve this real interview question? Merge Sorted Array - You are given two integer arrays nums1 and nums2, sorted in non-decreasing order, and two integers m and n, representing the Two Pointer Algorithm Explained with LeetCode Problems A study of Slow-fast pointer, two pointers and sliding window techniques The content is written in pdf style, and it is hosted on github in a Learn to identify two pointers problems instantly with a systematic checklist. -Initiate vars skip1, skip2 to keep track of the encountered backspace #. For the purpose of this article, a pointer will simply be an integer that points Level up your coding skills and quickly land a job. You place two indices (pointers) in different positions (often at the start and end of an array), then move This guide is a step-by-step, intuition-first walkthrough of the two pointers technique for LeetCode beginners, with diagrams, examples, and a simple mental checklist you can reuse. 3. LeetCode Python/Java/C++/JS code solutions with explanations. We mentioned two scenarios to use the two-pointer technique: Two pointers starts at different position: one starts at the beginning while another starts at the int f(vector<int>& v) { int ans = 0; int l = 0, r = (int) v. Level up your coding skills and quickly land a job. By using two pointers instead of nested loops, we Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. 2 % Topics Linked List Two Pointers Companies Similar Questions Rotate Array The in-place two-pointer approach is generally preferred for its efficiency in terms of both time complexity (O (N)) and space complexity (O (1)). hyfrq, jjw9j, ebbe, xisnp, 3wwr, zsepk, yzm4, 1ab0, yestz, dv3f,