HackerRank_certification_Problem_Solving_intermediate This is a documentation of my Hackerrank solution for: Problem Solving (Intermediate) Certification solution Test duration: 90 minutesUpon successfully clearing an assessment, you can promote yourself using the HackerRank certificate to peers and employers. def. BOOLEAN_ARRAY isVertical # 4. Challenges: 54. Solve Challenge. Task You are given two classes, Person and Student, where Person is the base class and Student is the derived class. To associate your repository with the hackerrank-certificates topic, visit your repo's landing page and select "manage topics. Medium Max Score: 50 Success Rate: 62. Programmers must first understand how a human solves a problem, then understand how to translate this "algorithm" into something a computer can do, and finally, how to write the specific code to implement the solution. View editorial. 30%. HackerRank solutions to various domains like Problem Solving, C, C++, Python, Java, Linux Shell, 30 Days of Code, 10 Days of JavaScript. The following is an incomplete list of possible problems per certificate as of 2021. More specifically, they can choose letters at two different positions and swap them. Java Static Initializer BlockEasyJava (Basic)Max Score: 10Success Rate: 96. A number of points along the highway are in need of repair. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/largest-area":{"items":[{"name":"test-cases","path":"certificates. Print the two values as space-separated integers on one line. Minimum score a challenge can have: 20. This key competency includes Multithreading in Java, Working with Networking in Java, and Collections and Serialization. (Basics) Skill Test Certification 🎓. HackerRank - Problem Solving (Intermediate) Certificate. The Maximum Subarray. Problem Solving (Basic) Active Traders; Balanced System Files Partition; Longest. n = 23. 31%. Solved submissions (one per hacker) for the challenge: correct. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"README. md. In this HackerRank Day 29 Bitwise AND 30 days of code problem set, we have given a set S in which we need to find two integers A and B. HackerRank is the market-leading coding test and. . More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. To associate your repository with the hackerrank-sql-solutions topic, visit your repo's landing page and select "manage topics. Please let me know if the certificate problems have changed, so I can put a note here. Pull requests. first, push the element into the stack and then delete the element present at the top of the stack and then print the. X and His Shots. HackerRank Re. Solutions of more than 380 problems of Hackerrank across several domains. takes two arguments integer level and string separator. Challenges: 54. Take Test. This problem is from my intermediate problem solving certificate on Hackerrank ( it is already over and I failed horribly). Our Skills Certification Test is a culmination of our learnings from working with thousands of companies and millions. Do you have more questions? Check out our FAQ. Easy Max Score: 5 Success Rate: 99. Solution of the practice algorithms of Hacker Rank. A " Wrong Answer " status in your HackerRank Coding questions implies that your program or code is unable to produce the exact expected output for the Test Cases. # # The function is expected to return a LONG_INTEGER_ARRAY. PHP is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML. Certificate : React : Test : Basic : Basic Routing, Rendering Elements, State Management (Internal Component State), Handling Events, ES6 and JavaScript and Form Validation : Certificate : Problem Solving : Test : Basic : Data Structures (such as Arrays, Strings) and Algorithms (such as Sorting and Searching) . There are 1 question that are part of this test. " GitHub is where people build software. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. HackerRank Maximum Element problem solution. SQL (Intermediate) Skills Certification Test. Last updated 11/2023. On the candidate's Test Summary page, select a question and click on the View Report button beside it to open the detailed report of that question. This practice test contains a total of 26 questions. HackerRank Certification QuestionHackerrank certification question. Took this test on HackerRank here on 14th July 2020. Also, the Syllabus plays an important role. STRING s # 2. Road Repair; Balanced System File Partition Problem HackerRank-Certification-Solution-1. In this tutorial, we are going to solve or make a solution to the Maximum Element problem. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. In this HackerRank Anagram problem we have given a string, split it into two contiguous substrings of equal length. Solve HackerRank problems to get Gold star and 670 points in SQL HackerRank. Inner and Outer – Hacker Rank Solution. Take the HackerRank Certification Test and showcase. This repository consists of Hackerrank 30 Days Of Code Solutions in JAVA. HackerRank solutions in C and C++ by Isaac Asante. As a candidate who has received a HackerRank Test Invite, you can access the sample test from the Instructions section of the test Login page. Steps. Function Description. Solve Challenge. On the candidate's Test Summary page, select a question and click on the View Report button beside it to open the detailed report of that question. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/maximum-subarray-value":{"items":[{"name":"test-cases","path. Instructions. " GitHub is where people build software. Problem Solving (Basic) Problem Solving (Intermediate) +1. Else, move to i+1. You could use git on a command line or using a Graphical UI. java hackerrank java-8 hackerrank-solutions hackerrank-java 30daysofcode 30days hackerrank-challenges 30dayscodechallenge hackerrank-solutions-github hackerrank-solutions-for-java. Viewing Detailed Reports. The exam had 2 coding test problems that had to be completed within 90 minutes. 75%. Add this topic to your repo. It takes a string name as a parameter and changes teamName to name. Solve Challenge. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/hotel-construction":{"items":[{"name":"test-cases","path":"certificates. It covers topics like Scalar Types, Operators and Control Flow, Strings, Collections and Iteration, Modularity, Objects and Types and Classes. Disclaimer: The above Problems are generated by Hacker Rank but the Solutions are Provided by CodingBroz. For the first example, you can solve the problems with rating 5 and 7 on the first day and the problem with rating 4 on the next day. This key competency includes Package and Modules Management, and. noOfValleys will be incremented by 1 if the hiker passes through a valley, while currentStep will be incremented by 1 when the current character in the string is ‘U’ and. Print output to STDOUT". so here we have given N queries. Disclaimer: The above Python Problems are generated by Hacker Rank but the Solutions are Provided by CodingBroz. The objective is to choose one element from each array to form the selected array. You need to complete problems which are sorted by difficulty and given numbered by variety. Psingh12354 / HackerRank-Certification Star 87. Each player has an integer rating representing skill level. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"HackerRank Problems","path":"HackerRank Problems","contentType":"directory"},{"name":"2D. If you feel proud of it as an achievement and you feel it shows off your skill level, feel free to put it on your resume. The competency area includes an understanding of variable scope and storage classes, understanding. Java. 2 years ago. 9 (63 ratings) 9,511 students. Any case of code plagiarism will result in disqualification of both the users from the contest. Unexpected Demand Complete Program In my Github Problem Solving. Hackerrank Certification. These tutorial are only for Educational and Learning. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Commonly Asked HackerRank Questions and Their Answers. 0. 📺 My YouTube Channel. The line contains two integers and , meaning that there is a road connecting cities with numbers and . 7 months ago + 0 comments. Solve Challenge. To solve the problem, I have declared 3 variables: noOfValleys, currentStep and previousStep and they all have the value set to 0 initially. We could not find the page you were looking for, so we found something to make you laugh to make up for it. The Matrix is. There was a problem preparing your codespace, please try again. 64%. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Level up your coding skills and quickly land a job. Contains Solutions of HackerRank Certification in Python Basics. HackerRank_certification_Problem_Solving_intermediate This is a documentation of my Hackerrank solution for: Problem Solving (Intermediate) Certification solution Test duration: 90 minutes Upon successfully clearing an assessment, you can promote yourself using the HackerRank certificate to peers and employers Get Your Skills Certified Problem Solving (Basic) Bitwise AND. The actual test contains 26 questions and you will be given 60 minutes to answer as many questions as possible. 6 commits Files Permalink. Subdomains. Solve Challenge. Problem Solving. The rating for Alice's challenge is the triplet a = (a [0], a [1], a [2]), and the rating for Bob's challenge is the triplet b = (b [0], b [1], b. Viewing Detailed Reports. Problem Solving Concepts. Certification. Here is my solution in java, javascript, python, C, C++, Csharp HackerRank Repair Roads Problem Solution. 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. The solution to the "unexpected demand" problem in the C programming language. competitive-programming hackerrank. The Core Point to Handle is that For Each Combination of 2 Alphabets. Solution in Python: #!/bin/python3 import math import os import random import re import sys # # Complete the 'getMaxArea' function below. Prepare for you upcoming programming interview with HackerRank's Ultimate Interview Preparation Kit. "Mastering Java: Solve Real-world Challenges on Hackerrank" is a comprehensive course that takes you on a journey to become an expert Java programmer by solving real-world challenges on Hackerrank. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/task-of-pairing":{"items":[{"name":"test-cases","path":"certificates. Get started hiring with HackerRank. Certificate: Problem Solving: Test: Basic: Data Structures (such as Arrays, Strings) and Algorithms (such. HackerRank Skills Certification Test is a test conducting by Hackerrank which provides a certificate on successful completion of test which can be used in different ways to apply for new jobs in HackerRank jobs and also endorse your skills. 5. Take Test. Latest commit . Strings. Covariant Return Types – Hacker Rank Solution. Problem Solving (Intermediate) Skills Certification Test. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/user-friendly-password-system":{"items":[{"name":"test-cases","path. This is the HackerRank certification test for Python (Basic). python java sql gaming string code test solution shape class anagram python3 laptop reverse problem-solving average adder hackerrank-solutions python-shape hackerrank-certification Resources. Problem Solving (Basic) Active Traders; Balanced System Files Partition; Longest Subarray If s [i] is a number, replace it with o, place the original number at the start, and move to i+1. 26%. Problem Solving Basic Free Hacker rank Certification With Solutions | Free Hacker rank Problem Solving Basic Course CertificateHi guys so in this video we. HackerRank's programming challenges can be solved in a variety of programming languages (including Java, C++, PHP, Python, SQL, JavaScript) and span multiple computer science domains. , Mock Tests: 0. 02%. Programs. HackerRank Strings: Making Anagrams problem solution. Given two arrays of strings, for every string in one list, determine how many anagrams of it are in the. so here we have given N queries. In this case, represents the bitwise AND operator. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Improve your Javascript basics. Are you legally authorized to work in the United States? Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. oldName, a string. HackerRank Python (Basic) Skills Certification Test Solution. 09. Intermediate. 1. Abstract Classes - PolymorphismHardC++ (Basic)Max Score: 60Success Rate: 89. python hackerrank fizzbuzz certification python-basics swapping reversed python-certification hackerrank-certification. Problem Solving (Basic) Problem Solving (Intermediate) +. Determine the minimum number of characters to change to make the two substrings into anagrams. YASH PAL July 22, 2021. Easy Problem Solving (Intermediate) Max Score: 5 Success Rate: 95. This is the best place to expand your knowledge and get. HackerRank solutions to various domains like Problem Solving, C, C++, Python, Java, Linux Shell, 30 Days of Code, 10 Days of JavaScript. MIT license Activity. In this tutorial, we are going to solve or make a solution to the Maximum Element problem. The above mentioned name will be displayed on your certificate and cannot be changed later. Problem Solving (Advanced) Python (Intermediate) Difficulty. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/password-decryption":{"items":[{"name":"test-cases","path":"certificates. Join over 16 million developers in solving code challenges on. The following is an incomplete list of possible problems per certificate as of 2021. 85%. At its core, problem-solving focuses on the study. Pull requests. Sample Test link. Main uses include adding interactive behavior to web pages, Creating web and mobile apps, Building web servers and developing server applications, game development, etc. The coach would like to pair up students whose ratings differ by no less than a given minimum. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. More specifically, they can choose letters at two different positions and swap them. com practice problems using Python 3, С++. Git is a distributed version control system to track changes in source code. python java sql gaming string code test solution shape class anagram python3 laptop reverse problem-solving average adder hackerrank-solutions python-shape hackerrank-certification Resources Readme At HackerRank, we have worked with over 1500+ companies and conducted more than 20 Million developer assessments. 31K views • 3 years ago. Programs. Topics programming certificate algorithms string hackerrank data-structures gcd problem. If all elements of a row are represented in the selected array, the row is set to 1. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The link to GitHub:. , Mock Tests: 0. At HackerRank, we have worked with over 1500+ companies and conducted more than 20 Million developer assessments. Working my way through Interview Preparation Kit on Hacker Rank. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 0. Description. Solution in Python: #!/bin/python3 import math import os import random import re import sys # # Complete the 'getMinCost' function below. 6. 2. Combinatorial Search. Polynomials – Hacker Rank Solution. Hey guys, this is an example video with solution, on how can you solve the HackerRank Rest API (Intermediate) Skills Certification Test, I wrote one solution. There are 1 question that are part of this test. Our Skills Certification Test is a culmination of our learnings from working with thousands of companies and millions. In this HackerRank Anagram problem we have given a string, split it into two contiguous substrings of equal length. nathan-abela Update README. Key Competencies: {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/longest-subarray":{"items":[{"name":"test-cases","path":"certificates/problem. It makes you think about special problems, rather than generic "write a sorting algorithm" problems. Click the Candidates tab, and select a candidate entry. Get certified with hakerrank SQL Interme. Feel free to ask doubts in the comment. Joined Logger - JavaScript (Basic) Certification Test Solution | HackerRank. Please ensure you have a stable internet connection. Bot Building. Complete the function numberOfWays in the editor below. We have to replace all three characters from the first string with 'b' to make the strings anagrams. In this HackerRank Repair Roads problem solution Two roads are adjacent if they have the same city at one of their endpoints. Get certified in technical skills by taking the HackerRank Skills Certification Test Standardised Assessment Assessments are organised around specific skills and are. Your submission score factor (lies between 0 and 1) based on correctness of the submission: sf. R is commonly used for Data Analysis, Statistical Computing, Machine Learning algorithms & scientific research. In this HackerRank The Maximum Subarray problem solution we have given an array and we need to find the maximum possible sum among all nonempty subarrays and all nonempty subsequences and then print the two values as space-separated integers on. numberOfWays has the following parameter: int roads [n-1] [2]: a 2-dimensional array of integers, O-indexed,. When encrypted, the string "hack3rr4nk" becomes "43Ah*ckorronk". Skills: Problem Solving (Basic) Take this mock test to evaluate how much you've learned till now. * * The function is expected to return an INTEGER. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. This is a Problem Solving Course. This key competency includes Multithreading in Java, Working with Networking in Java, and Collections and Serialization. 96%. View Skill Info. HR_ProblemSolving1. Natural. # # The function is expected to return an INTEGER. # The function accepts following parameters: # 1. An anagram of a string is another string with the same characters in the same frequency, in any order. Medium. Product Management Cross-functional Skills. Learn more about bidirectional Unicode characters. Python: Shape Classes with. On hackerrank coding window it says that. Some of those challenges include Javascript, Java, React, and Python. To associate your repository with the hackerrank-certification topic, visit your repo's landing page and select "manage topics. About. . But it's an automatic fail if you cheat. In this HackerRank Java Subarray problem in the java programming language We define the following: A subarray of an n-element array is an array composed from a contiguous block of the original array's elements. More to be updated soon. At its core, problem-solving focuses on the study, understanding, and usage of data structures and algorithms. takes a message object as an argument. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Add this topic to your repo. j_k1 July 4, 2022, 4:13am 1. Problem Solving (Basic) Problem Solving (Intermediate) +1. Function Description. This is the best place to expand your knowledge and get prepared for your next interview. HackerRank Java (Basic) Skill Certification Test. Add this topic to your repo. Any characters can be deleted. 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. Collections. Problems with similar vi values are similar in nature. md. Subsequence Weighting. " GitHub is where people build software. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. To review, open the file in an editor that reveals hidden Unicode characters. It covers topics of Data Structures (such as HashMaps, Stacks and Queues) and Algorithms (such as Optimal Solutions). Accelerate your Job Search. © 2023 All rights reserved. Add this topic to your repo. 84%. Complete the function renameFile in the editor below. # The function accepts following parameters: # 1. Introduction. credit: xkcd. More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects. Learn more about bidirectional Unicode characters. The Circle class takes the radius as an argument and calculates the area using the constant math. Hackerrank Problem Solving Solution Tutorial playlist in python Solving data structure and algorithm problems in python with understandable approach. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Solution in Python: #!/bin/python3 import math import os import random import re import sys # # Complete the 'findSum' function below. PHP stands for Hypertext Preprocessor, and is integrated with a number of popular databases, including MySQL, PostgreSQL, Oracle, Sybase, Informix, and Microsoft SQL Server. function decryptPassword(s) {// Write your code here let find= '*'; let replace = ''; while( s. 7. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. NET initiative, C# is a general-purpose, object-oriented programming language designed for Common Language Infrastructure (CLI), and widely recognized for its structured, strong-typing and lexical scoping abilities. This is a timed test. indexOf(find) > -1) { var s = s. Active Traders. Implement 4 methods: add (self,val): adds val to the multiset. . Problem solution in Python programming. Use trees such as red-black or. Questions Feel free to choose your preferred programming language from the list of languages supported for each question. There was a problem preparing your codespace, please try again. Some common causes of a " Wrong Answer " are listed below: A mismatch between the format of your output and the format of the expected output. Plenty of employers will have no idea what a "Hackerrank Skill Certificate" is, nor have any idea what it takes to achieve one, and even if they do, knowing how to solve Hackerrank. Star. Updated on. This competency area includes fundamentals of the R programming language, understanding Data Frames, Packages, and Data Reshaping, using Data interfaces,. An equal number of crews are available, stationed at various points along the highway. ) to finish all the 58 SQL challenges on the site, and I gained quite some insights from. returns a new function f, such that f takes a variable number of message objects. Therefore, the maximum cost incurred on a single day is 10. It has solution of various certifications which includes problem solving,. Stars. Spearman's Rank Correlation Coefficient: Problem: Easy: 30: Solution: 8: Least Square Regression Line: Problem: Easy: 30:. The next lines contains two integers describing the endpoints. c-plus-plus cplusplus algorithms competitive-programming hackerrank data-structures interview-questions coding-interviews coding-challenge hackerrank-solutions c-programming. Thanks if you are watching us!{"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-intermediate/nice-teams":{"items":[{"name":"test-cases","path":"certificates/problem. An institutional broker wants to review their book of customers to see which are most active. and then we need to perform queries on the stack. You will be able to learn different topics with the help of Python. Attempts: 275054 Challenges: 1 Last Score: -. HackerRank admins decision will be final. It took me a bit more than two weeks (on and off between work, workout, and taking the kid to day school, etc. It covers topics of Data Structures (such as HashMaps, Stacks and Queues) and Algorithms (such as Optimal Solutions). Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. HR_ProblemSolving1. Just had someone submit a Hackerrank test and get a 100%, but I know for certain that they cheated on the final problem. Nested ListsEasyPython (Basic)Max Score: 10Success Rate: 91. Intermediate. The function must return an integer denoting the number of ways to build 3 hotels in such a way that the distance between every pair of hotels is equal. Add this topic to your repo. An equal number of crews are available, stationed at various points along the highway. HackerRank's programming challenges can be solved in a variety of programming languages (including. That’s what this piece of code does: let arrObj = {}; for (let num of arr) {. A brief discussion on every hackerrank Certification assessment - GitHub - sambhav228/Hackerrank_Certifications: A brief discussion on every hackerrank Certification assessment. React (Basic) It covers topics like Basic Routing, Rendering Elements,State Management (Internal Component State), Handling Events, ES6 and JavaScript and Form Validation. Pull requests. Something went wrong. This test assesses your ability to solve business problems using deductive, inductive, and quantitative reasoning. For example, let's say the array is arr = [10, 7, 2, 8, 3), and let '&' denote the bitwise AND operator. py","path":"Skills. INTEGER N * 2. 6. md. Hard. We are evaluating your submitted code. java","contentType":"file"},{"name":"README. Some employers find this very important. I am struggling to formulate the constraint with Minizinc. HackerRank solutions to various domains like Problem Solving, C, C++, Python, Java, Linux Shell, 30 Days of Code, 10 Days of JavaScript. Hard Max Score: 60 Success Rate: 58. Hard Problem Solving (Advanced) Max Score: 50 Success Rate: 71. Game of two stacks (hackers rank problem) algorithm. That may seem excessive, but the gap has narrowed significantly from 2021, when Problem Solving outnumbered the next 14 skills by more than 3x. Contact Us. For example, the username “bigfish” can be changed to “gibfish” (swapping ‘b’ and ‘g’) or “bighisf” (swapping ‘f’ and ‘h’). 4. Here is one question from hackerrank, I have a solution but there is some testcase failed because time limit exceeded. What is the minimum number of days it can be completed in?Hackerrank Problem solving solutions in Python. 8. Find two integers, and (where ), from set such that the value of is the maximum possible and also less than a given integer, . To associate your repository with the hakerrank-problem-solving topic, visit your repo's landing page and select "manage topics. We are the #1 global leader in developer assessment and helping companies understand and screen technical talent. Maximum Cost of Laptop Count - Problem Solving (Basic) certification | HackerRank Hotel Construction - Problem Solving (Intermediate) | Hacker Rank Step Counter - JavaScript (Basic) Certification test solution | HackerRankHackerRank Maximum Element problem solution. INTEGER h # 3. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/subarray-sums":{"items":[{"name":"test-cases","path":"certificates/problem. Medium. To associate your repository with the hackerrank-problem-solving topic, visit your repo's landing page and select "manage topics. YASH PAL January 20, 2021. Algorithms - Use optimal solutions to solve problems. Weather Observation Station 5EasySQL (Intermediate)Max Score: 30Success Rate: 94. INTEGER K */ public static int bitwiseAnd (int n, int k) { // Write your code here. Foundational skills like Problem Solving will always rank highly, but we’re seeing more specialized skills gaining ground, and that’s reflected in year over year growth. Java Lambda Expressions – Hacker Rank Solution. Today, we’re excited to announce the launch of HackerRank certifications, a library of certification tests designed to help job seekers showcase their technical skills to potential employers. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Improve your Javascript basics. 0. The first line contains an integer , denoting the number of cities. Join over 16 million developers in solving code challenges on HackerRank, one of the. More than 3,000 tech teams, representing all industries and from countries around the world, trust HackerRank. These Contain Some C Programming Solution of Hacker Rank😏. Stop if iis more than or equal to the string length. " GitHub is where people build software.