Certification apply Link- WhatsApp Group- Our Telegram group TechNinjas2. Like Practice questions of C | C++ | JAVA | PYTHON | SQL and many more stuff. The product of their areas is . Active Traders Description SubmissionAbsolute Permutation HackerRank Solution in C, C++, Java, Python. A cell is called a dominant cell if it has a strictly greater value than all of its neighbors. The solution of HackerRank Python Basic Certification problem shape classes with area method and dominant cells is shared for your increasing knowledge. n cells. each cell can be free or can contain an obstacle, an exit, or a mine. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Maximum cost of laptop count (C++)","path":"Maximum cost of laptop count (C++)","contentType. The function accepts 2D_INTEGER_ARRAY grid as parameter. Contribute to srgnk/HackerRank development by creating an account on GitHub. Determine how many squares the queen can attack. When a programmer submits a solution to a programming challenge, their submission is scored on the accuracy of their output. . {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Maximum cost of laptop count (C++)","path":"Maximum cost of laptop count (C++)","contentType. Authority if any of the queries regarding this post or website fill the following contact form thank you. ⭐️ Content Description ⭐️In this video, I have explained on how to solve password cracker using recursion in python. queries blocks follow, each describing a query. Aggregation. Count the number of items in a 2-D list which are higher than all of its neighbours, whether vertical, horizental or diagonal neighbours. md","path":"README. md","contentType":"file"},{"name":"balanced_system_file_partition. Certificate can be viewed here. Non Dominant Sets. This is the Hackerrank Python (Basic) Certification Test. md","path":"README. A reviewer rates the two challenges, awarding points on a scale from 1 to 100 for three categories: problem clarity, originality, and difficulty. The second line should contain the result of float division, a / b. ⭐️ Content Description ⭐️In this video, I have explained on how to solve connected cells in a grid using graph search and simple logic in python. py","path":"Gaming Laptop Battery Life. #. To decode the script, Neo needs to read each column and select only the alphanumeric characters and connect them. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. We have a function called avg that takes in a variable number of integer inputs. These are the steps: Get an HSV mask of the red markers Contains solved programs for the HackerRank Python (Basic) Skill Test Certification 🎓 python solutions functions hackerrank data-structures certification Updated Oct 17, 2022 Certification apply Link- WhatsApp Group- Our Telegram group TechNinjas2. Solution. Red: cell. Out of the 4 regions, this region. '. gitignore","contentType":"file"},{"name":"LICENSE","path":"LICENSE. Problem Statement -: A taxi can take multiple passengers to the railway station at the same time. Transcribed image text: There is a given list of lists of integers that represent a 2- dimensional grid with n rows and m columns. Hello everyone! Here's my solution (to just the required function) in C++ 20: The worst-case time complexity of the above code is O (m * n), where m and n denote the number of rows and columns in the input grid, respectively. zeros and numpy. Explanation for Vending Machine -The VendingMachine class has a constructor that takes two parameters num_items and item_price, which represent the. Updated Jan 18, 2021. XXX. Alice and Bob each created one problem for HackerRank. The function loops through each cell in the grid, and for each cell, it checks if that cell is dominant. Given a grid, a start and a goal, determine the minmum number of moves to get to the goal. On the 6th move, you will have the matching string. Parsing is the process of syntactic analysis of a string of symbols. Compare the Triplet HackerRank Solution in C, C++, Java, Python. You are given an infinite 2-d grid with the bottom left cell referenced as (1,1). Initialize your list and read in the value of n. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. This blog helps in understanding underlying javascript concepts, problems, competitive programming and javascript related frameworks. In this HackerRack problem, we are given in input an n x m matrix containing as elements just 0s and 1s. Two cells are said to be connected if they are adjacent to each other horizontally, vertically, or diagonally. There is a castle on the intersection of the aath row and the bbth column. Starts at 7/23/2021 - 4:00PM. Let's play a game? The game consists of N steps wherein each step you are given two integers a and b. {"payload":{"allShortcutsEnabled":false,"fileTree":{"python":{"items":[{"name":". The first line should contain the result of integer division, a // b. Codersdaily provides you with the best material, live training by industry experts, and real-time industry experience, which will help you. Sum and Prod. Use custom input for testing your code Compile and Run. In this post, we will solve HackerRank Knapsack Problem Solution. Contains Solutions of HackerRank Certification in Python Basics. Algorithms; Data Structures; Mathematics; C. Transform each string according to the given algorithm and return the new sentence. + v (8). {"payload": {"allShortcutsEnabled":false,"fileTree": {"": {"items": [ {"name":"Average Function","path":"Average Function","contentType":"file"}, {"name":"Dominant Cells","path":"Dominant. It is important to learn to use it well. md","path":"README. Find the largest connected region in a 2D Matrix. Tải file định dạng PDF, DOC, XLS, PPT, TXTAn example grid CA is Conway’s Game of Life which stores boolean values at each cell and has the following update rule: Consider the sum N = v (1) +. This is correct: if the grid has one row or column, Babai will walk along that line and visit all its cells (so the whole 1 dimensional grid), which has indeed m. Problem Solving. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. In this HackerRank Ema's Supercomputer problem, you need to find the two largest valid pluses that can be drawn on good cells in the grid, and return an integer denoting the maximum product of their areas. The Matrix is filled with cells,and each cell will. A user-defined function is a function that is defined by a user. The deep cells in the top two corners don't share an. In other words, the start and end. This video provides video solutions to the Hacker Rank Python (Basic) Certification . I read that HackerRank tests are used. For the explanation below, we will refer to a plus of length as . python dominant cells code. Here, 0 <= i <= x; 0 <= j <= y; 0 <= k <= z. Consider a matrix where each cell contains either a or a and any cell containing a is called a filled cell. python hackerrank fizzbuzz certification python-basics swapping reversed python-certification hackerrank-certification. Your playing piece can move along any row or column until it reaches the edge of the grid or a blocked cell. In the grid and pattern arrays, each string represents a row in the grid. "You can perform the following commands: insert i e: Insert integer e at position i. In this HackerRank Training the army problem solution Your goal is to design a series of transformations that results in a maximum number of skill sets with a non-zero number of people knowing it. To clarify, are you looking for code that identifies the dominant cells in a Python program? If so, could you provide more details about what you mean by "dominant cells"? Are you referring to cells in a grid or matrix that have a certain property or characteristic? The more information you can provide, the better I. It consists of alphanumeric characters, spaces and symbols (!,@,#,$,%,&). {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"3D Surface Area. Sean invented a game involving a 2n x 2n matrix where each cell of the matrix contains an integer. The *args is a special syntax in python used to define a variable number of inputs. SELECT DISTINCT CITY FROM STATION WHERE MOD(ID, 2) = 0; IX. A flip here means changing the number from 0 to 1 and vice-versa. md","contentType":"file"},{"name":"vendingMachine. HackerRank Reduce Function problem solution. more. Marc's Cakewalk [Easy] Solution. py","contentType":"file"},{"name":"Absolute. Python: Division — Hacker Rank Solution. A tag already exists with the provided branch name. Output Format. finditer () problem solution. Note that each cell in a region is connected to zero or more cells in the. Question IndexesHackerRank Certification Question Topics python java sql gaming string code test solution shape class anagram python3 laptop reverse problem-solving average adder hackerrank-solutions python-shape hackerrank-certification100 HackerRank Solution in Order. 6K views · 2:14 · Go to. In the following grid, all cells. It covers topics like Scalar Types, Operators and Control Flow, Strings, Collections and Iteration, Modularity, Objects and Types and Classes. array([ 1, 2 ]) B = numpy. YASHasvi SHUkla [ Sic Mundus Creatus Est ] , India About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. The city of Gridland is represented as an n x m matrix where the rows are numbered from 1 ton and the columns are numbered from 1 to m. The surface area of 1 x 1 x 1 cube is 6. Prepare for your Interview. YASHasvi SHUkla [ Sic Mundus Creatus Est ] , IndiaAbout Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. All Paths have been explored and one passenger is collected. My primary purpose is to pass all the platform tests of a given problem. And the others are the cell (“c”). YASH PAL April 18, 2021. If you are looking into improving your SQL skills all you need to do is keep practicing. Branches Tags. Once you feel comfortable with the basic SQL syntax, your best option is to start solving coding. • For each subsequent character, say x, consider a letter. 5 of 6; Submit to see results When you're ready, submit your solution! Remember, you can go back and refine your code anytime. 1. You can find me on hackerrank here. # Size of "board"1010 x2 in range(x-1, x+for y2 in (y-1, y+ y != y2) [ (), (), (, ), (5, ), (5), (4, Determining. . arr. . You can perform any of the 2 operations N on in each move: 1: If we take 2 integers a and b where , N = a * b , then we can change N = max ( a, b ) 2: Decrease the value of N by 1. A Hackerrank number is a magic number that can be used to get sudo permissions on the site. star () & Re. In the first test case, we can obtain the resulting grid by increasing the number in row 2 2, column 3 3 once. def connectedCell ( matrix ): area = max_area = x = xm1 = xp1 = y = ym1 = yp1 = 0 n , m = len ( matrix ), len ( matrix [ 0 ]) nrange , mrange , stack = rangeSmall Triangles, Large Triangles HackerRank Solution. Problem Solving(Basic) – HackerRank Skills Certification. Python Programming (Basics) Shopping Cart; String Transformation; 2. Connected Cells in a Grid: connected-cell-in-a-grid. Given an array of strings of digits, try to find the occurrence of a given pattern of digits. Previous article Great Learning Academy Free Certificate Courses. This problem can be converted to a graph search problem. import java. Apart from providing a platform for. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. each cell can be free or can contain an obstacle, an exit, or a mine. Returns:HackerRank Ema's Supercomputer problem solution. #. Let pos [i] denote the value at position i in permutation P using 1-based indexing. After N such steps, if X is the largest number amongst all the cells in the rectangular board, can you print the number of X's in the board? Input Format The first line of input contains a single integer N. Add logic to print two lines. HackerRank Validating Email Addresses With a Filter problem solution. Polynomials. More than 100 million people use GitHub to discover, fork, and contribute to over 420. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Maximum cost of laptop count (C++)","path":"Maximum cost of laptop count (C++)","contentType. We'll break it down into steps: def compareTriplets (a, b): # Initialize the scores for Alice and Bob. L ike most other competitive programming platforms, HackerRank groups challenges into different difficulty levels. It should return an array of strings, each representing a row of the finished puzzle. Reverse Words and Swap Cases2. You will be given a square chess board with one queen and a number of obstacles placed on it. # The function accepts 2D_INTEGER_ARRAY grid as parameter. codechef-solutions. In this post, we will solve HackerRank Frog in Maze Problem Solution. pop: Pop the last element from the list. Python: Dominant Cells || Python (Basic) || HackerRank Skills Certifications || Solution. Print a list of all possible coordinates given by (i, j, k) on a 3D grid where the sum of i + j + k is not equal to n. Solution. It can be solved by BFS for the minimum moves. You are given n triangles, specifically, their sides ai, bi and ci. Posted on June 9, 2020 June 10, 2020. I would appreciate someone that helps me identify this case and improve the code. Two cells are neighbors when they share a common side or a common corner, so a cell can have up to 8. The coin parameter will accept the values any of the following values: 5, 10, 25, 100, 200. Happy Ladybugs is a board game having the following properties: The board is represented by a string, b, of length n. append e: Insert integer e at the end of the list. To prevent re-visiting the same nodes in the grid, a flag matrix can be used for toggling. ) append (x) Adds a single element x to the end of a list. The top is 3 units. HackerRank's programming challenges can be solved in a variety of programming languages (including. Each cell of the map has a value denoting its depth. when the helix starts rotating then it is easy to find out the position of a given number and the number located at the given position. Optimal Strategy for a Game using memoization: The user chooses the ‘ith’ coin with value ‘Vi’: The opponent either chooses (i+1)th coin or jth coin. The best way to calculate a area of a triangle with sides a, b and c is. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Average Function","path":"Average Function","contentType":"file"},{"name":"Dominant Cells. In this task you have to find the presence of vowels in all possible substrings of the given string. Solve Challenge. print: Print the list. We are evaluating your submitted code. Try it today. A tag already exists with the provided branch name. Our experts have curated these kits with challenges from top companies & mock tests to assess yourself. Empty cells are indicated by the character '. Find all the cavities on the map and replace their depths with the uppercase. We would like to show you a description here but the site won’t allow us. It hosts four featured contests every month (Long Challenge, CookOff, LunchTime, and Starters) and gives away prizes and goodies to the winners as encouragement. Took this test on HackerRank here on 1st July 2023. py","contentType":"file"},{"name":"LICENSE","path. py","contentType":"file"},{"name":"vending_machine. Only on the bot, illustrated by “b” in the game, and several dirty coordinates, noted by the “d” symbol, which is located randomly by the system. We are going to generate a hackerrank number from two integers A & B. A cell is called a dominant cell if it has a strictly greater value than all of its neighbors. If one or more filled cells are also connected, they form a region. . static SinglyLinkedListNode deleteNode(SinglyLinkedListNode head, int position)In this post, we will solve HackerRank Clique Problem Solution. The observations made to arrive at this solution are very well explained by the problem author in. import numpy A = numpy. py","path":"3D Surface Area. . No rounding or formatting is necessary. Display more resultsMatplotlib is the dominant plotting / visualization package in python. XXX. . Launching Visual Studio Code. This means that if a bomb detonates in. The majority of the solutions are in Python 2. vscode","contentType":"directory"},{"name":"min-max-riddle. A taxi can take multiple passengers to the railway station at the same time. You are given a square map as a matrix of integer strings. It is guaranteed that all the areas are different. 4 of 6; Test your code You can compile your code and test it for errors and accuracy before submitting. and we need to print a single line containing a single integer denoting the sum of the line numbers of the. Each cell of the map has a value denoting its depth. This question can be solved without using this big array. Each cell contains some points. Castle on the Grid. There is enough good space to color one plus and one plus. id = id_ self. Given a matrix A of n rows and n columns. com is a search engine built on artificial intelligence that provides users with a customized search experience while keeping their data 100% private. Cannot retrieve contributors at this time. com like an old school people. This is your one-stop solution for everything you need to polish your skills and ace your interview. Python3 solution using simple iterative approach and a stack isntead of recursion. The BFS search needs a queue. Code your solution in our custom editor or code in your own environment and upload your solution as a file. MIT Licence {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"3D Surface Area. If b[i] is an underscore (i. We will send you an email when your results are. Language: Python3; 1. . HACKERRANK SOLUTION: Delete a Node //COPY PASTE THIS PART OF CODE IN THE GIVEN BLANK SPACE OF YOUR EDITOR…. Many other solutions exist, such. Detect Floating Point Number – Hacker Rank Solution; Map and Lambda Function – Hacker Rank Solution; Re. This is the HackerRank certification test for Python (Basic). GitHub is where people build software. using namespace std; int solve (int i,int j,int n,int m,vector>&a) { if (i<0 || j<0 || i>=n || j>=m || a [i] [j]==0) { return 0; } a [i] [j]=0; int r,t,y,f,h,c,v,b; r=solve (i-1,j-1,n,m,a); t=solve (i. 4k forks. Is named avg. So that I did not follow any coding style. The underside is 3 units. 5 thoughts on “Hackerrank – SQL – Advanced Select – Occupations – Solution” sai. vscode","path":"python/. Once a bomb detonates, it’s destroyed — along with anything in its four neighboring cells. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Our platform provides a range of challenges covering various C programming topics such as arrays, pointers, functions, and more. Hello coders, in this post you will find each and every solution of HackerRank Problems in C language. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. HackerRank Solutions. In this HackerRank A Chessboard Game problem solution we have Given the initial coordinates of the players' coins, assuming optimal. We define P to be a permutation of the first n natural numbers in the range [1,n]. HackerRank is a tech company that focuses on competitive programming challenges for both consumers and businesses, where developers compete by trying to program according to provided specifications. You are given a set S of N cartesian points. This tutorial is only for Educational and Learning purposes. To fill the array's cells with values, you can use a nested loop. Connected Cells In A Grid [Medium] Solution. For each given string you have to print the total number of vowels. md","path":"README. Two cells are said to be connected if they are adjacent to each other horizontally, vertically, or diagonally. Given a matrix A of n rows and n columns. Continue. There may be some questions which may differ from those I have done in the video, if your quest. Python Incorrect Regex HackerRank Solution Codersdaily is the best IT training institute in Indore providing training and placements on a variety of technology domains in the IT and pharma industry. py","path":"3D Surface Area. HackerRank DFS: Connected Cell in a Grid. Each string should be modified as follows: • The first character of the string remains unchanged. md. array([ 1, 2 ]) B = numpy. ","#","","def numCells(grid):"," # Write your code here"," result=0"," for i in range (len(grid)):"," for k in range (len(grid[0])):"," value = grid[i][k]"," flag=1"," for ii in range (max(0,i-1), min(len(grid), i+2)):"," for kk in range (max(0, k-1), min(len (grid[0]), k+2)):"," if (ii,kk. CP. The value of each of the cells in the co-ordinate (u, v) satisfying 1 ≤ u ≤ a and 1 ≤ v ≤ b, is increased by 1. National Disability Independence Day 2021 Coding Contest. e. '. py: Graph Theory: Hard: Dijkstra: Shortest Reach 2: dijkstrashortreach. Python: Shape Classes. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. py","path":"swapcase. The while True condition keeps you. Python (Basic) Skills Certification Test. 6 of 6{"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Dominant_Cells. We are evaluating your submitted code. append ( 9) print arr # prints [1, 2, 3, 9]The HackerRank Skills Certification Test is a standardized assessment to help developers prove their coding skills. For example, consider the following grid: The pattern begins at the second row and the third column of. Answered on Oct 25, 2009. # The function is expected to return an INTEGER. Polynomials. You can pick any cell and flip the number in all the cells (including the picked cell) within the Manhattan distance D from the picked cell. To fill the array's cells with values, you can use a nested loop. 3 Answers. Dot and Cross. You can even add multiple types in a single list! Let's look at some of the methods you can use on list. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 2 Questions are asked, as of now 2 questions will be asked from these questions, provided the solution also: Programs / Questions. There are 1 question that are part of this test. You are given a square grid with some cells open (. , and . To convert s to t , we first delete all of the characters in 3 moves. I have taken HackerRank Python (Basic) Skills Certification Test on 8th April 2023. Grid Challenge [Easy] Solution. In the following grid, all cells marked X are connected to the cell marked Y. Task. The main function begins by reading an integer n from the input, which represents the number of words. Handling Exceptions. The Solutions are provided in 5 languages i. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Python (Basic) Skills Certification Test. the maze is surrounded by a solid wall made of obstacles. HackerRank Crossword Puzzle Interview preparation kit solution. The dot tool returns the dot product of two arrays. In this post, we will solve HackerRank Flipping the Matrix Problem Solution. YASH PAL July 21, 2021. The next line contains space-separated integers contained in the array. This hacker. In this HackerRack problem, we are given in input an n x m matrix containing as elements just 0s and 1s. P is considered to be an absolute permutation if |posi [i]-i]=k holds true for every i belongs to [1,n]. Two cells are said to be connected if they are adjacent to each other horizontally, vertically, or diagonally; in other words, cell [i][j] [ i] [ j] is. Hackerrank Solution · Python. L ike most other competitive programming platforms, HackerRank groups challenges into different difficulty levels. . Code your solution in our custom editor or code in your own environment and upload your solution as a file. With Python — Hacker Rank Solution. 1. . We are evaluating your submitted code. Disclaimer: The above Problem Python programs is generated by Hackerrank but the Solution is Provided by Chase2Learn. Problem Solving(Basic) – HackerRank Skills Certification. Two cells are neighbors when they share a common side or a common corner, so a cell can have up to 8 neighbors. this is code Shaan and I try to solve all 150 Artificial Intelligence Problems on HackerRank. In the diagram below, the two colored regions show cells connected to the filled cells. All caught up! Solve more problems and we will show you more here!This is the course material page for the Introduction to Programming course (TKT10002, 5 cr) and the Advanced Course in Programming (TKT10003, 5 cr) from the Department of Computer Science at the University of Helsinki. Prepare for your Interview. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"LICENSE","path":"LICENSE","contentType":"file"},{"name":"README. The output should contain as many lines as the number of '#' signs in the input text. Question : 1. I have taken HackerRank Python (Basic) Skills Certification Test on 7th Nov 2023. The chess board’s rows are numbered from to , going from bottom to top. python hackerrank fizzbuzz certification python-basics swapping reversed python-certification hackerrank-certification Updated Jan 18, 2021; Python; sheoraninfosec / hackerrank-python-basic-skill-test-certfication Star 0. Mean, Var, and Std. Balanced System File Partition; Vowel Substring ; I'll be uploading other solutions of hackerrank certifications questions in this repo. Min and MaxEasyPython (Basic)Max Score: 20Success Rate: 98. Explanation for Vending Machine -The VendingMachine class has a constructor that takes two parameters num_items and item_price, which represent the number of. Our experts have curated these kits with challenges from top companies & mock tests to assess yourself. HackerRank - DFS: Connected Cell in a Grid#DFS #DepthFirstSearch #MatrixUse Depth First Search algorithm to search horizontally, vertically, or diagonally on. I think if j1mbl3s will read the hackerrank problem statement once, this solution will make a lot more sense to you. The next line contains space-separated integers contained in the array. Find the largest connected region in a 2D Matrix. If you have any query then drop me message into LinkedIn or else you can email me on deeppatel. 18 Find a string - Python Solution. 1 1 1 0 1 0 1 1 1. If a base contains at least one package inside or on top of its. A tag already exists with the provided branch name. Problem. HackerRank complete exercise problems solved. Transcribed image text: There is a given list of lists of integers that represent a 2- dimensional grid with n rows and m columns. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Average Function","path":"Average Function","contentType":"file"},{"name":"Dominant Cells. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Average Function","path":"Average Function","contentType":"file"},{"name":"Dominant Cells. Solutions of Hackerrank Python Domain challenges. You signed out in another tab or window. {"payload":{"allShortcutsEnabled":false,"fileTree":{"hr/ctci":{"items":[{"name":"array_left_rotation. There are n words, which might repeat, in word group A. Solve Challenge. " You can perform the following commands: insert i e: Insert integer e at position i. 21 Text Wrap - HackerRank Python String Problem Solution. First line contains an integer T , denoting the number of test cases. Add this topic to your repo. In the following grid, all cells marked X are connected to the cell marked Y. As suggested in the name of the problem, we should think of a solution that refers to graphs, and more specifically on the Depth. Each cell in the grid either contains a bomb or nothing at all. HackerRank Coding Problems with Solutions-1 0 Start at top left corner. Vector-Sort in C++ - Hacker Rank Solution. 1. . Rectangular Game. #. md. ⭐️ Content Description ⭐️In this video, I have explained the overview of hackerrank website and additional course details to improve coding skills.