Hackerrank robot in a grid The Algorithms Domain Falls under a broader Problem Solving Skill Set in HackerRank which consists of both Data Structures and Algorithms. Before considering a neighbouring cell for exploration, the algorithm checks two conditions – the cell must be within the defined grid boundaries and the cell’s value in the grid representation must not be 1, which signifies an obstacle. The model consists of robots (AGVs), shelves, storage area, picking stations, and charging stations. To execute a query, a robot travels to container , picks up candy, transports it to container , and then stops at until it receives another query. Determine if the columns are also in ascending alphabetical order, top to bottom. 0, automation and robotics play a crucial role in enhancing operational efficiency … Jan 23, 2025 · Approach: The idea is to use Dijkstra's algorithm to find the minimum cost path through the grid. Your playing piece can … Find if it is possible to rearrange a square grid such that every row and every column is lexicographically sorted. These problems range from easy to more complex challenges… Can you solve this real interview question? Robot Room Cleaner - Level up your coding skills and quickly land a job. Sep 9, 2022 · Given a n*m grid and the position of some poles to be painted in the grid, the task is to find the minimum cost to paint all the poles. Any cell containing a is called a filled cell. You can move up, down, left, or right from and to an empty cell in one step. This repository contains all solutions to Hackerrank practice problems with Java. About Recreated Hackerrank web page HTML CSS exercise, using flex, grid etc. 317 efficient solutions to HackerRank problems. The robot can receive one of three possible types of commands: -2: turn left 90 degrees -1: turn right 90 degrees 1 <= x <= 9: move forward x units Some of the grid squares are obstacles. The Travelling Salesman in a grid is a classic problem since it combines pathfinding with optimization, making it tricky but very practical for real scenarios. Better than official and forum solutions. note this is not my coding style it is just for the fast writing in problem-solving contests - mohandsakr/my-problem-solving-solutions Given the initial configuration of the grid with the locations of Bomberman's first batch of planted bombs, determine the state of the grid after seconds. Robot can o The robot only moves along the perimeter of the grid. I explain the question and the best way to solve it and then solve it using Python. It might not be perfect due to the limitation of my ability and skill, so feel free to make suggestions if you spot something that can be improved Unique Paths A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). HackerRank concepts & solutions. He starts from the top left corner and visits every cell exactly once and returns to his initial position (top left). There was just one task in hackerrank, sorta like this "there is bot in infinite grid. , following rules and constraints. Walking Robot Simulation Description A robot on an infinite XY-plane starts at point (0, 0) facing north. How many ways can you take steps without leaving the grid at any point? You leave the grid if at any point , either or . The warehouse is represented as a 10x10 grid, where Jul 23, 2025 · Given a grid of n rows and m columns. Examples A robot on an infinite grid starts at point (0, 0) and faces north. The next line solution codes to problems on hackerrank. Firstly, we simplified the traditional pile type warehouse as a node-based 2D grid model. An obstacle and space are marked as 1 or 0 respectively in grid. # Now consider if some obstacles are added to the grids. -1: Turn right 90 degrees. This gist contains the full code, and passes all the test cases. Efficient navigation through complexities becomes a metaphorical passport to success, emphasizing strategic planning and innovation. , grid [0] [0]). #problemsolving #hackerrank #hackerranksolutions #leetcode #leetcodesolutions #graph #datastructure --------------------------------------------------------- Add this topic to your repo To associate your repository with the amazon-hackerrank topic, visit your repo's landing page and select "manage topics. Contribute to kevnath/hackerrank-solutions development by creating an account on GitHub. An example position might be 0, 0, N, which means the rover is in the bottom left corner and facing North. Note that each cell solution codes to problems on hackerrank. Other cells contain integers representing the cost of C# Solutions for Hackerrank challenges. com/challenges/grid-challenge Apr 28, 2020 · In this paper, the path planning problem of goods transportation is formulated as a traveling salesman problem (TSP). … Welcome to the HackerRank Challenge Solutions repository! 🎉 This repository contains my solutions to various coding challenges on HackerRank. PROBLEM STATEMENT In smart warehouses, we will use the results of multi-robot task balancing to plan continuous paths. The main challenge is balancing efficiency with constraints, especially as the grid size grows. The travelling salesman has a map containing m*n squares. Path in a Maze/Grid Grid and Maze Representation: A grid or a maze is generally represented as a 2D array or matrix consisting of rows and columns. The ith obstacle is at This is a collection of my HackerRank solutions written in Python3. In this post, we review the AI questions you need to know. " Learn more Solutions to various problems in various languages - ozan/solutions Ahmed bought a robot toy for his son Nazim Solving code challenges on HackerRank is one of the best ways to prepare for programming interviews. I love solving problems and I love writing code! My hackerrank id is 'ceevee87' and as of Fall 2019 I earned my 6-star Gold Badge in Algorithms on Hackerrank. * The east direction is the positive direction of the x-axis. How many possible unique paths are there? Can you solve this real interview question? Shortest Path in a Grid with Obstacles Elimination - You are given an m x n integer matrix grid where each cell is either 0 (empty) or 1 (obstacle). A This project contains three Amazon software development engineer technical interview/assessments. May 7, 2020 · This is a working solution for the C++ greedy algorithm problem called Grid Challenge on HackerRank. You can find me on hackerrank here. Nov 1, 2019 · With the implementation of A* Search Algorithm, the robot could determine the shortest route in which it could efficiently move less steps compared to robots which uses all possibilities that exists. The obstacle is denoted as 9 and the grid is 0/1 matrix. Contribute to umeshravuru/hackerrank development by creating an account on GitHub. , grid[0][0]). The problems cover a wide range of topics, from beginner to advance. Some cells might be obstacles where the robot cannot enter. Two squares are considered adjacent if they share a common edge and the time taken to reach square b from square a and vice HackerRank Solutions in Python3. The robot tries to move to the bottom-right corner (i. Automated the process of adding solutions using Hackerrank Solution Crawler. Given string of commands find out if there is circle which robot will never leave. In one step, you can walk one step ahead or behind in any one of the n dimensions. 1 <= k <= 9: Move forward k units, one unit at a time. Daily Task (10 MCQs) to be done in first 10 mins; answers discussed after. May 23, 2025 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more. A value of 0 means that you can enter that cell and 1 implies that entry to that cell is not allowed. Auxiliary Space: O (R+C), which corresponds to the maximum depth of the recursive call stack. The robot is positionned in a cell in a grid GG of size H∗WH∗W. Given the robots' positions and directions, find the number of moving robots that will collide. If it is not possible to find Oct 1, 2024 · Saloni6111 commented Oct 1, 2024 There is a robot on an m x n grid. Jul 23, 2025 · For the recursive approach, there are three potential cases for each cell in the grid (for any cell at position (m, n)): The cost to reach the current cell can be calculated by moving left, i. * -1: Turn right 90 degrees. hackerrank. The robot can receive a sequence of these three possible types of commands: -2: Turn left 90 degrees. Sep 15, 2022 · AI interview questions have been a critical component of technical hiring for decades. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in the diagram below). Nov 18, 2022 · HackerRank Castle on the Grid Problem Solution Solve HackerRank Castle on the Grid Problem Problem You are given a square grid with some cells open (. It then moves up by 4 position to (12,7). How many ways can you take m steps May 3, 2022 · In this video we are solving yet another Google interview question: Robot Room Cleaner (Leetcode # 489). 32 mind bending puzzle rooms to master with 10+ hours of gameplay. HackerRank This is the Repository where you can find all the solution of the Problems which you solve on competitive platforms mainly HackerRank and HackerEarth 228 efficient solutions to HackerRank problems. Jul 26, 2022 · Designing an optimized path for multiple robots in a warehouse for picking and delivery operations using A* algorithm (shortest path) and linear programming (task allocation). There are only three possible types of instructions the robot can receive: * -2: Turn left 90 degrees. Dec 3, 2024 · Solutions for project euler 208 and hackerrank question robot walks, hard, tags: math, simulation. If any cell contains 0, it is a free cell, if it contains 1, there is an obstacle and you can't pass through the cell, and if it contains 2, that means it is free and if you step into this cell, you can pass through any adjacent cell of it that contains obstacles. Hackerrank algorithms problems solutions with practical programs and code example in python, java, c++, c and Javascript programming Java solution - passes 100% of test cases To keep track of visited grid cells, just mark the original grid cell with a 0. The i -th obstacle is at grid point (obstacles[i][0], obstacles[i][1]) If the robot would try to move onto them, the robot stays on the HackerRank algorithms problems solutions in C, C++, java, Python, Javascript with practical program code example and complete explanation Can you solve this real interview question? Unique Paths III - You are given an m x n integer array grid where grid[i][j] could be: * 1 representing the starting square. Find the largest connected region in a 2D Matrix. Return the minimum number of steps to walk from the upper left corner (0, 0) to the lower right corner (m - 1, n - 1) given Mar 27, 2023 · Time Complexity: O (2^ (R+C)), where R and C are the number of rows and columns in the grid, respectively. All integers in positions are unique. A robot is located at the top-left corner of a m x n grid (marked ‘Start’ in the diagram below). This repository contains solutions to a variety of coding problems that I have worked on and solved. This approach treats the grid as a graph where each cell is a node, and the algorithm dynamically explores the most cost-effective path to the bottom-right cell by always expanding the lowest-cost paths first. 📢 DAA Course Announcements 📘 Keep separate notebooks for Theory and Lab. . The robot can only move either down or right at any point in time. This implies that there are always 2 x n possible moves if movements are unconstrained by grid boundaries. HackerRank is the market-leading coding test and interview solution for hiring developers. Solutions to HackerRank problems. , grid [m - 1] [n - 1]). Here, I explain how to use string iterators to sort char The robot first moves right for 10 positions to the new position (12,3). Start hiring at the pace of innovation! HackerRank solutions in Java/JS/Python/C++/C#. Cells adjacent to filled cells: If one or more filled Optimizing routes for our traveling salesman is akin to crafting a golden visa in the grid of challenges. net) problem archive. Use a variety of different cube types such as glass, magnet, diffraction, laser, and Fresnel. Here you'll find well-documented and tested solutions in multiple programming languages. ) and some blocked (X). com. 2. 📗 Solutions of more than 380 problems of Hackerrank accross several domains. Examples: Jul 31, 2024 · In this HackerRank Grid Walking problem solution, you are situated in an n-dimensional grid at position (x1, x2,…. These cells are marked with a -1. In-depth solution and explanation for LeetCode 489. For example, if the initial grid looks like: Jun 8, 2020 · One of the 3 problems that I had to solve in an hour was finding the maximal value in a grid where you traverse it and add 1 to the elements based on the coordinates given. Can you think if modulus can help you quickly compute which cell it stops at? HackerRank is a place where programmers from all over the world come together to solve problems in a wide range of Computer Science domain. Return the minimum number of steps to walk from the upper left corner (0, 0) to the lower right corner (m-1, n-1) given that you can eliminate at most k obstacles. 🧠 1 LeetCode/HackerRank problem weekly (same login) — for internal marks. There is no cost involved in moving from one row to the other, whereas moving to an adjacent column has 1 rupee cost associated with it. - PranjayGoyal/Wareho This video is a solution to Leet code 1041, Robot Bounded In Circle. - nalin88/HackerRank-Project-Euler-Solutions Can you solve this real interview question? Robot Collisions - There are n 1-indexed robots, each having a position on a line, health, and movement direction. All robots start moving on the line simultaneously at the Jun 14, 2013 · so I just signed up for hackerrank and took a swing at the first AI problem which involves searching through a grid to find princess Peach and then printing out the steps the robot mario should take to save her. * 2 representing the ending square. This one on the surface looks easy because it's a pre HackerRank solutions in Java/JS/Python/C++/C#. This is an implementation of a simulation for an autonomous robot navigating a rectangular warehouse. Can you solve this real interview question? Walking Robot Simulation - A robot on an infinite XY-plane starts at point (0, 0) facing north. , Dn). In one step, you can move up, down, left or right from and to an empty cell. You need a way to tally all of a region's pixels. Hackerrank Solutions of more than 380 problems of Hackerrank across several domains. * 0 representing empty squares we can walk over. , grid[m - 1][n - 1]). Jul 23, 2025 · Given an matrix of size m x n, the task is to find the count of all unique possible paths from top left to the bottom right with the constraints that from each cell we can either move only to the right or down. Good planning in algorithms is similar to choosing a clear route for reliability or going with this direction when flexibility is needed Shortest Path in a Grid with Obstacles Elimination Given a m * n grid, where each cell is either 0 (empty) or 1 (obstacle). com site. Finding the maximum sum of some/all the elements from N elements choosen under certain condition described by the code-snipet provided in the challenge Jan 8, 2024 · Problem # Given a m x n grid filled with non-negative numbers, find a path from the top left corner to the bottom right corner which minimizes the sum of all numbers along its path. Amazon Online Assessment Questions Preparation | Amazon OA Web-Based Evaluation, synonymous with 'Online Assessment' conducted on platforms like Hackerrank or Codility, is an initial protocol that candidates need to pass to secure a Software Development Engineer role at Amazon. We should give as output the size of the largest available region. Currently, you are at point (0, 0) and must reach point (n-1, m-1). * The south direction is the negative direction of the y-axis. The robot is trying to reach the bottom-right corner of the grid (marked ‘Finish’ in the diagram below). Unique Paths Leetcode Problem : There is a robot on an m x n grid. Your task is determining the number of unique paths the robot can take to reach the bottom-right corner while avoiding obstacles. Note that: * The north direction is the positive direction of the y-axis. The time taken for the salesman to move from a square to its neighbor might not be the same. A robot on an infinite XY-plane starts at point (0, 0) facing north. The robot receives an array of integers commands, which represents a sequence of moves that it needs to execute. Return the Jul 27, 2022 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more. , grid [m – 1] [n – 1]). Contribute to rdsiva/hackerrank development by creating an account on GitHub. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. This is the best place to expand your knowledge and get prepared for your next interview. Given a square grid of characters in the range ascii [a-z], rearrange elements of each row alphabetically, ascending. Consider a matrix where each cell contains either a or a . 1 <= k <= 9: Move forward k units, one unit at a time. Step by step approach: Jul 31, 2024 · In this HackerRank Grid Walking problem solution, you are situated in an n-dimensional grid at position (x1, x2,…. the dimensions of the grid are (D1, D2,…. * -1 representing obstacles that we cannot walk over. The plateau is divided up into a grid to simplify navigation. Then, a new concept called the largest convex polygon Given a bounded 2-D grid, can you find out the number of lines touch its border? Jan 1, 2018 · The demand for application of mobile robots in performing boring and extensive tasks are increasing rapidly due to unavailability of human workforce. Contribute to nugusha/ProjectEuler-HackerRank development by creating an account on GitHub. Contribute to RyanFehr/HackerRank development by creating an account on GitHub. This simplifies the code. There are only three possible types of instructions the robot can receive: -2: Turn left 90 degrees. The first was completed in 2019, administered via AMCAT, and the second was in 2021, the third in 2024 -- the last two were both administered via HackerRank. You are given a 2d list grid [] [] of size n x m consisting of values 0 and 1. I spent a little to much time on the second problem and only ended up with about 20 minutes for this one. The robot is initially located at the top-left corner (i. Usually in the projects and jobs — algorithmic puzzles isn’t often … HackerRank C++ solution to the Grid Challenge coding question. In this challenge, you must program the behaviour of a robot. The languages I have used for solving each problems includes an explanation of the approach and the problem-solving techniques that I have used. Your task is to move the robot through it in order to clean every "dirty" cells. A robot is located at the top-left corner of an A x B grid (marked ‘Start’ in the diagram below). regionLen is tracking the length of the longest depth-first path in the region, which is not necessarily the total region size. Contribute to srgnk/HackerRank development by creating an account on GitHub. The Algorithms Domain is further Divided into the following sub-domains. Nov 1, 2019 · Download Citation | On Nov 1, 2019, Ali Bolu and others published Path Planning for Multiple Mobile Robots in Smart Warehouse | Find, read and cite all the research you need on ResearchGate Help a robot traverse the matrix Solving code challenges on HackerRank is one of the best ways to prepare for programming interviews. We’re obsessed about the happiness and success of our customers, clients and – above all – our team. Given the two integers m and n, return the number of possible unique paths that the robot can take to reach the bottom-right corner. 📝 Regular assignments My HackerRank solutions. Two cells are said to be connected if they are adjacent to each other horizontally, vertically, or diagonally. In the following grid, all cells marked X are connected to the cell marked Y. The multi-robot path planning in the warehousing environment is modelled as a two-dimensional grid. The dimensions of the grid are (D_1,D_2,D_N). Sep 27, 2025 · Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and more. Black on white are not connected. In one step you can go HackerRank ‘Super Reduced String’ Solution HackerRank ‘sWAP cASE’ Solution HackerRank ‘Taum and B’day’ Solution HackerRank ‘The Grid Search’ Solution HackerRank ‘The Love-Letter Mystery’ Solution HackerRank ‘The Minion Game’ Solution HackerRank ‘The Power Sum’ Solution HackerRank ‘Time Complexity: Primality Jul 23, 2025 · Path in a Grid or Maze refers to problems that involve navigating through a grid-like structure from the source (starting point) to the destination (endpoint) while avoiding the obstacles i. You are given 0-indexed integer arrays positions, healths, and a string directions (directions[i] is either 'L' for left or 'R' for right). * The west direction is the negative direction of the Join over 28 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Contribute to vivienzou1/HackerRank-3 development by creating an account on GitHub. Feb 3, 2024 · 30 HackerRanks Easy problems While searching new career opportunities, it’s great time for improving algorithmic skills. There is exactly one starting square. The robots take instructions in the form of queries consisting of two integers, and , respectively. , from cell (m, n-1). You can only move either down or right at any point in time. Sep 1, 2021 · However, one of the fundamental needs of Mobile Robots is a collision-free navigation with an optimal path from the source to the destination. These solutions are categorized by difficulty level and domain to make it easier to navigate and find what you need. Oct 21, 2018 · I am trying to solve below problem but I have no clue where to start. The objective of the simulation is to model the robot's movement from a starting position to a designated destination while avoiding obstacles. Some of the grid squares are obstacles. Problem Description You have a robot positioned on a grid with m rows and n columns. Robot Room Cleaner in Python, Java, C++ and more. Comme Oct 1, 2025 · Solutions for project euler 208 and hackerrank question robot walks, hard, tags: math, simulation. Problem link: https://www. Jun 6, 2017 · Laser Grid is a first-person puzzle game in which you power devices by redirecting, combining and splitting different colored lasers. Mar 27, 2025 · Top 25 Hackerrank Coding Questions is given in this page along with the Solutions in different languages so tha you ca practice more. At HackerRank, people are the core of our mission. Given the two integers m and n, return the number of possible unique paths that the robot can take to Given a square grid of characters in the range ascii [a-z], rearrange elements of each row alphabetically, ascending. There is exactly one ending square. The goal of this series is to keep the code as concise and efficient as possible. Nov 23, 2016 · Write a method, which accepts N, M and the grid as arguments and returns one integer - the total number of different paths that the robot can take from the start to the end cell, MODULO 1,000,003. I will not spoil the joy you'll feel when you get it working by giving you code. e. Contribute to vycius/HackerRank development by creating an account on GitHub. XXX XYX XXX If one or more filled cells are also connected, they form a region. Can you solve this real interview question? Robot Bounded In Circle - On an infinite plane, a robot initially stands at (0, 0) and faces north. A novel path planning algorithm for warehouse robots based on a two-dimensional (2D) grid model is proposed to solve this type of TSP. ,xn). * 1 <= k Max Average Stock Price Amazon OA 2023 Solution Robot Bounded In Circle Amazon OA 2023 Shopping Options Amazon OA 2023 Solution Fill The Truck Maximum Units on a Truck Amazon OA Solution Maximize Score After N Operations Number Game Solution Amazon OA 2023 Slowest Key Amazon OA 2023 Solution Five Star Seller Maximum Average Pass Ratio Amazon OA Jun 9, 2024 · Smart Navigation in Warehouses: Dijkstra’s Algorithm for Mobile Robot Path Planning In the era of Industry 4. In this paper, a collision-free low-complexity Mobile Robot navigation scheme called Collision Aware Mobile Robot navigation in Grid-Environment is designed. - GitHub - Aashub/Hacker-Rank-Solved-Problems: This repository contains solutions Nov 30, 2024 · Solutions for LeetCode 1041 LintCode 1345 GFG HackerRank, medium, tags: math, string, simulation, companies: linkedin, salesforce. Each assessment folder contains questions, sample test cases, and of course, annotated solutions to each question. This implies that there are always possible moves if movements are unconstrained by grid boundaries. In this repository I share some of my solutions for hackerRank question. My solutions of Hackerrank training. Solving code challenges on HackerRank is one of the best ways to prepare for programming interviews. Welcome to my GitHub repository featuring solutions to Project Euler and HackerRank challenges. Can you solve this real interview question? Unique Paths II - You are given an m x n integer array grid. In-depth solution and explanation for LeetCode 2087. - alive- Grid Walking algorithm: You are situated in an N dimensional grid at position (x_1,x_2,,x_N). 💻 Laptop required — tasks will be done live. ProjectEuler+ HackerRank. Contribute to saubhik/hackerrank development by creating an account on GitHub. Dec 4, 2024 · Here are several HackerRank-style coding problems with solutions written in C#. There is robot and it needs to reach obstacle in a grid. The robot cannot pass through squares marked as obstacles. The robot has movement restrictions - it can only move in two directions: Right (to the next column) Down (to the next row) Your task is to find the total number of unique HackerRank Algorithms Solutions This repository contains solutions to the Algorithms Domain part of HackerRank. Solutions for HackerRank's wonderful (and at times ruthlessly difficult) expanded versions of the Project Euler (projecteuler. In the diagram below, the two colored regions show cells connected to the filled cells. The robot can only move either down or right at any point in time. Some of the grid squares are HackerRank solutions in Java/JS/Python/C++/C#. Hackerrank solutions for medium and hard level problem in python - karthik-skr/HackerRank-Python-Solution My HackerRank Codes. Feb 21, 2023 · Your bug is subtle. I didn't finish it in time so it's bugging me. Each cell is a Nov 30, 2023 · The robot can only move downwards or to the right at any given point. Feb 8, 2018 · HackerRank DFS: Connected Cell in a Grid In this HackerRack problem, we are given in input an n x m matrix containing as elements just 0s and 1s. Contribute to hamidmayeli/HackerRankSolutions development by creating an account on GitHub. Interview question for UI Architect. there is commands string, which repeats indefinitely - G stand for move one step forward, R - turn to the right, L - turn to the left. The grid contains obstacles and empty spaces, which are marked as 1 or 0 respectively. Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. In one step, you can walk ahead or behind in any o Jun 3, 2023 · In this post, we will solve HackerRank Grid Challenge Problem Solution. Minimum Cost Homecoming of a Robot in a Grid in Python, Java, C++ and more. Input Format The first line contians the position x and y of the robot. There is a robot initially located at the top-left corner (i. How many possible unique paths are there? Problem Link. Your task is to calculate My solutions to HackerRank practice problems using C# If you are interested in helping or have a different solution, feel free to make a pull request. Consider a matrix where each cell contains either a or a and any cell containing a is called a filled cell. It is my solution to the problems on the hackerrank. Contribute to tsyogesh40/HackerRank-solutions development by creating an account on GitHub. This is because in the worst case, we need to explore all possible paths in the grid, which can be as many as 2^ (R+C). The robot starts at the top-left corner of the grid (position [0][0]) and wants to reach the bottom-right corner (position [m-1][n-1]). Find if it is possible to rearrange a square grid such that every row and every column is lexicographically sorted. You start at the upper-left corner of the grid (0, 0) and you have to reach the bottom-right corner (n-1, m-1) such that you can only move in the right or down direction from every cell. HackerRank sam’s puzzle (Approximate) problem solution HackerRank Spices, Revised problem solution Hackerrank TBS problem solution HackerRank prime dates problem solution HackerRank minimum operations problem solution Hackerrank XOR strings problem solution HackerRank zig zag sequence problem solution HackerRank smart number problem solution Apr 22, 2018 · Welcome to Subscribe On Youtube 874. Oct 20, 2024 · The algorithm incorporates obstacle detection to ensure the robot navigates only on valid paths. Intuitions, example walk through, and complexity analysis. For example, you start off in a 3 dimensional grid at position .