Start hiring at the pace of innovation! Two Pointers and Sliding Window Technique The two pointer and sliding window techniques are widely used algorithmic approach in computer science and programming. Jan 26, 2025 · In this video, I talk about the two pointers technique which is a very important DSA topic for coding interviews. After going through the solutions, you will be able to understand the concepts and solutions very easily. in Compare the data in two linked lists node by node to see if the lists contain identical data. Join over 11 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. It allows solving a class of problems efficiently by using two pointers to iterate through arrays or linked HackerRank Hello world in c solution HackerRank Playing with characters solution in c HackerRank sum and difference of two numbers solution in c HackerRank functions in c solution HackerRank pointers in c solution HackerRank Conditional statements in c solution HackerRank For loop in c solution HackerRank Sum of Digits of a five-digit number Level up your coding skills and quickly land a job. If the head pointer is , indicating the list is empty, nothing should be printed. Aug 13, 2021 · 50+ array interview questions, all with links to high-quality solutions, plus an arrays refresher and cheat-sheet. The task is to print the of each node, one per line. Jun 8, 2025 · Here are HackerRank C All Problems solutions with practical programs and code in the C Programming language. Solving code challenges on HackerRank is one of the best ways to prepare for programming interviews. It’s a prestigious startup doing exactly what I wanted. Doing this will mean only passing a pointer to the sorting function with every new comparison strategy. The merge point is where both lists point to the same node, i. Jan 13, 2025 · In this article, we’ll explore what the two-pointer technique is, when to use it, and dive into some examples to understand its application. Apr 25, 2023 · The slow pointer moves one node at a time while the fast pointer moves two nodes at a time. Our platform offers a range of essential problems for practice, as well as the latest questions being asked by top-tier companies. This is the best place to expand your knowledge and get prepared for your next interview. Sep 15, 2025 · 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—either toward each other or in the same direction to solve problems more efficiently Two Pointer Technique The 2 pointer technique is mostly applicable in sorted arrays where we try to perform a search in O (N). : Welcome Back, Guys !! Today in this post we will discuss Pointers in C Hackerrank Practice problem in C programming language. in/gAs6WZ6X 3. leetcode. Start hiring at the pace of innovation! Dec 1, 2019 · Two Pointer Algorithm For Coding Interview: In this video, I have explained two pointer technique which is the optimal way to solve problems related to arrays, strings and linked list in O (N Here's a detailed YouTube description for a video titled "HackerRank Pointers in C Solution":---**HackerRank Pointers in C Solution | Full Walkthrough and Ex Jan 21, 2023 · One of these approaches goes by Two-Pointers and is the subject of this video. Is HackerRank a good way to learn how to program? I'm aware that HackerRank is generally used by employers to see how skilled a potential employee is. Given pointers to the head nodes of linked lists that merge together at some point, find the node where the two lists merge. Jul 31, 2022 · Nossa, cara, nem me diga. Given two arrays ( and ) sorted in ascending order and an integer , we need to find and , such that is equal to . Part 1 of our coding interview prep series to help you ace your software engineer interview. For the two-sum problem, if we fix one of the numbers, say x, we have to scan the entire array to find the next number y, which is value - x where value is the input parameter. Apr 6, 2024 · The problem statement of Hackerrank Pointers question for C++ is to update two Pointers value, one with the sum and other with the difference using a function named update. Traverse the first linked list using the pointer p until you reach the end. For someone like me who's in high school and coding leisurely (and professionally in the near future), would HackerRank be a good way to learn? Is hackerrank hard or am I just a bad programmer? I've been working through HackerRank (for like almost a year now) and recently I've been focusing on the mathematics, functional programming, and algorithms sections (I've already completed python and regex). Function Description Complete the function with the following parameter (s): : a reference to the head of the list Print Learn how to declare pointers and use them. Sep 18, 2023 · The two pointer technique is a must-know strategy for technical interview candidates. For the problem of detecting cycles in a linked list, there is a universal solution—the fast and slow pointer method (Floyd’s Cycle Detection Algorithm). This video can serve as a C tutorial to learn how to pass v Boost your coding interview skills and confidence by practicing real interview questions with LeetCode. Thanks. Today, we’re discussing int and float data types. Sliding Window: https://lnkd. They are primarily used whenever… Hello coders, in this post you will find each and every solution of HackerRank Problems in C language. Well Coderz, Today we will be solving Pointers in C HackerRank Solution. Level up your coding skills and quickly land a job. com problems that scale up in difficulty from trivial to complex, fun to see how others solved it after you are done, focus on the best practice answers, not the "clever" answers. Prefix Sum: https://lnkd. When to Use the Two-Pointer Approach? The decision to use the two-pointer approach depends on the nature of the problem and the specific requirements of the task at hand. in/dfwrvzxH Here’s how Week 1 went Day Platform Task 91 LeetCode Implement Stack using Queues 92 HackerRank Queue using Two Stacks 93 GeeksforGeeks Well Coderz, Today we will be solving Pointers in C HackerRank Solution. Objective The fundamental data types in c are int, float and char. If there is a cycle in the linked list, t he fast pointer will eventually catch up to the slow pointer Jul 23, 2025 · 5. Objective In this challenge, you will learn to implement the basic functionalities of pointers in C. If you are preparing for In this challenge, you will learn to implement the basic functionalities of pointers in C. Finding the Intersection Point of Two Linked Lists: To find the intersection point of two linked lists using the two-pointer technique, follow these steps: Initialize two pointers, p and q, to the heads of the two linked lists, respectively. com learning educational, some handholding early. e. Join over 28 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Cracking Amazon's coding interview questions is any developer's dream. They are used whenever a function needs to modify the content of a variable, but it does not have ownership. Jan 13, 2022 · Hello, I have been solving all two pointers tagged problems in last 3. Given two pointers, named slow and fast, both start at the head of the list. the basic functionalities of pointers Given a pointer to the head of a linked list, determine whether the list has a cycle. Jul 23, 2025 · The Two Pointer Approach is a powerful and efficient technique used to solve problems involving sorted arrays, searching, and optimization. they reference the same memory location. This problem is set for students to get better knowledge to handle Pointers in C, and how to use call by reference for a function call. Here's an example. A pointer in C++ is used to share a memory address among different contexts (primarily functions). Find the best ins and outs of Amazon coding interviews with 45 practice problems. Nov 8, 2022 · Hey, I had an interview for what I considered my dream company. Learn how to declare pointers and use them. in/g2EXKs32 2. Dec 22, 2025 · Join LeetCode Discuss for coding insights, learning opportunities, and networking with fellow programmers in a vibrant community. HackerRank is the market-leading coding test and interview solution for hiring developers. What article are you referring to that said this . It is used to solve problems that can be efficiently solved by maintaining two positions or indices in a sequence or array. codewars. Daí fico quebrando a cabeça pensando em como fazer o negócio de uma forma mais eficiente kk. Dec 16, 2014 · Hey guys, so i just got a response from a company who wants me to take a one hour challenge on hackerRank. Sep 8, 2020 · Hackerrank has way better structures set up to teach you syntax, data structures, and common algorithms. 5 months, and wanted to share my findings/classifications here. Leetcode needs you to know your programming language of choice well and to understand the DSandA. Learn how it simplifies array and string problems with real-world examples and tips for coding interviews in 2025. Two Pointers: https://lnkd. Generally speaking, a two pointer algorithm has these characteristics: Two moving pointers, regardless of directions, moving dependently or independently; A function that utilizes the entries referenced by the two pointers, which relates to the answer in a way; An easy way of deciding which pointer to move; Given 2 arrays, you have to maitain them, given 4 types of queries. May 23, 2020 · Pointers in C - Hackerrank problem step by step solution. Jul 26, 2025 · Once the array is sorted then we can use this approach by keeping one pointer at the beginning (left) and another at the end (right) of the array. Sep 7, 2025 · 🚀 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. Pairs Hackerrank python solution 2: two pointers. If you need help, comment with your queries and questions in the comment section on the particular problem solutions. You can explore all my work here: https://lnkd. Jul 31, 2021 · Learn how to declare pointers and use themA pointer in C is a way to share a memory HackerRank C- Pointers in C. 4. com Jan 25, 2023 · I don’t think that is legal unless they specifically say the exam is proctored and you allow access to your webcam. Ratheshprabakar / Hackerrank-Solutions Public Notifications You must be signed in to change notification settings Fork 0 Star 1 DSA was HARD until I Learned these 20 Patterns: 1. GitHub Gist: instantly share code, notes, and snippets. Function Description Complete the function with the following parameter (s): : a reference to the head of the list Print A better implementation would be to write a sorting function that accepts a pointer to the function that compares each pair of strings. Join over 28 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. I was wondering if any of you guys could give me an idea of what to expect or what to study for. Contribute to RexIncogn/HackerRank-Solutions development by creating an account on GitHub. By utilizing two pointers either moving towards each other or in the same direction, we can reduce the time complexity of many problems from O (n2) to O (n) or O (nlog⁡n). Jan 26, 2024 · Posted by u/subinatub32 - 1 vote and no comments hackerrank. If fast reaches the end, it means there is no cycle. Sep 15, 2025 · 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—either toward each other or in the same direction to solve problems more efficiently Master the Two Pointers technique used in algorithmic problem-solving. Check the sum of the elements at these two pointers: If the sum equals the target, we’ve found the pair. com interview practice adventofcode. If the sum is less than the target, move the left pointer to the right to increase the sum. Jul 12, 2024 · HackerRank Sum and Difference of Two Numbers solution in C – In this tutorial, we are going to solve the Hackerrank Sum and Difference of Two Numbers problem and write a c program to for this problem. If they secretly recorded people without their permission or knowledge, that would be a whole lawsuit. Jul 23, 2025 · It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. The screener call with a founding engineer went really well, the next step was a hackerrank. You are given a pointer to the node of a linked list. Jul 12, 2024 · HackerRank Pointers in C problem solution – In this tutorial, we will solve the HackerRank Pointer in C problem and write a program solution for this problem. HackerRank solution for Pointers in C, which is a coding question under the introduction section. LeetCode Problems solved in this video: Thanks for Watching! If you found this video helpful, check other Geekific Jul 23, 2025 · The concept of using two pointers to manipulate an array is relatively easy to understand and implement, making it accessible to programmers of varying skill levels. Everytime I had a proctored hackerrank, they made it clear that I would be recorded, plus my laptop webcam lights up green. May 18, 2021 · If you don't finish the coding challenge on HackerRank, is it pretty much guaranteed you won't get the job? I've done 2 coding challenges on HackerRank so far as part of interview processes and both times, I was unable to complete the challenge. Can somebody suggest the problems for sliding window technique and two pointers? Codeforces problem set have the tag two pointers but it has random problems, I want 8-9 problems which covers every trick and concept of the topic. Eu adoro o HackerRank mas até hoje não consegui completar um desafio porque meu algoritmo sempre demora muito pra executar os dados de entrada (se não me engano, acho que o máximo é 10seg, né?). Core Algorithm Patterns Reusable mental models for: Sliding window Two pointers Binary search on answers DFS vs BFS Greedy decisions Prefix sums Dynamic programming states Patterns > memorization. A pointer in C is a way to share a memory address among dif all 25 solutions for c in HackerRank. A pointer in C is a way to share a memory address among different contexts (primarily functions). Each time, fast moves two steps, and slow moves one step.

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