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Hackerrank Test Cases Download
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Elda Vanostrand
Jan 19, 2024, 6:48:36 AM1/19/24
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Even tho the code I written seems to work fine for me in PyCharm, it doesn't pass the hackerrank test. I know I could just google the results and "ctrlc ctrlv" it, but I would like to know what exactly is wrong with my code.
Those familiar with HackerRank must be aware that often in coding tests you are asked to write code for a given question and the code must successfully pass a number of test cases. Some of these test cases have their Inputs and Outputs hidden from the test taker.
hackerrank test cases download
Download https://t.co/6MZO6Skp7Q
Yesterday, I came across a similar situation when I wrote a code for a question and it passed one of the given test cases but failed some others. The test case passed was the only one with visible input. The others were hidden. This made it incredibly difficult for me to debug my code. For what I could see, it worked just as expected.
One of the test cases however threw a run-time exception in JVM. The error was a NumberFormatException caused when my code apparently tried to convert a String of sort "abgjhlkpgsban 8080 0" into an integer. My code was expecting an integer as an input over here but the input seemed to be something entirely different. I hardly had the time to fix my code at this point as the test was about to end in a few seconds. Alas !
Later however, when I was pondering about the error, I came up with this idea of how one can use the JVM to deliberately throw Exceptions and know what the input test cases exactly are. Here, I share the same with you.
How does this work ? It's simple - STDERR is used for displaying errors by default and while STDIN and STDOUT are hidden from you, STDERR is not. This is to facilitate the test taker in knowing about the compile-time/run-time errors in their code.
I can't figure out how to get my code to pass all 15 test cases in hacker rank for the mini max sum test. The goal is to sum 4 out of the 5 integers and find the lowest and highest value and print them. My problem is with cases with really large integers. i know i have to make it 64 bit but i put int() around everything and it still won't work. what am i missing?
Output received after running the HackerRank test case :
No test case passed. Use print or log statements to debug why your hidden test cases are failing. Hidden test cases are used to evaluate if your code can handle different scenarios, including corner cases.
I know very little about HackerRank or how it works, but I wonder if the instructions have a capitalization typo, given that the name of the book should be Scala for the Impatient. I could imagine that the test case is actually looking for that, and the person writing the instructions got it wrong.
Originally, we put this simple question at the beginning of a test for warm-up. We received that answer from a candidate in our first batch of applicants. It was quite puzzling, what are the odds that someone would come up with an algorithm that convoluted if given only the text from the question? A quick investigation quickly revealed the source.
If anything, this article makes HackerRank better and more relevant. Now a test is about looking for help on Google and fixing subtly broken snippets of unindented code written in the wrong language.
Sorry but all of that complaints are valid against HackerRank.
Latest example, World CodeSprint 12 competition there that finished last Saturday. Was taking part too.
Take a look at what people are discussing in one of the problems:
-codesprint-12/challenges/factorial-array/forum
Basically there are problems with (hidden) test cases and meeting the performance expectations.
Which is caused by not using the right algorithm/trick and banging the head against the wall trying to improve it instead of going for different algorithm (the one the author of the task had in mind). And that is due to inexperience with the platform (not being aware that timing out test cases mean wrong algorithm) and also partially to the time limit for the competition, that makes one not wanting to start one of the tasks from the scratch again when there are others pending.
I have one question and i have writted down it on hackerrank but all the test cases gets failed , i have attached the images question please help
WhatsApp Image 2023-09-09 at 2.18.29 PM771856 81.5 KB
As a student still, my wild guess is if the code is compiled successfully, it is then test against a test suite specific for Java (I'm picturing a bunch of JUnit tests lol). Perhaps it is a separate microservice which handles the testing and keeping track of the metrics (such as memory usage, how many test cases passed, etc.)?
If so, this would mean each Leetcode question has multiple test suites, with each of them testing for the same test cases but just written in different languages (i.e. JUnit tests for Java, unittest for Python, etc.). I haven't given this a lot of thought, but I'm under the impression this could work. However, would this be the right way of solving such kind of software engineering problem?
Edit: Not asking specifically about Leetcode/HackerRank, but rather from a general software engineering standpoint, if its possible to test in a language agnostic way instead of writing separate test suites for different languages.
If you notice, most of these systems are setup in such a way that you're going to get some well known string input and have to produce some well known string output. At that point, they can take your code and run it as a plain old executable (in some highly disposable sandbox), testing via stdin and stdout while ignoring what language actually created the binary.
CodeforcesCodechefSpojHackerrankAtcoderSupported languagesCC++PythonJavaRubyHaskellInstallationBuild from sourcegit clone cd ACedItpython setup.py installAs a Python packagepip install --user ACedItUsageusage: acedit [-h] [-s codeforces,codechef,hackerrank,spoj] [-c CONTEST] [-p PROBLEM] [-f] [--run SOURCE_FILE] [--set-default-site codeforces,codechef,hackerrank,spoj] [--set-default-contest DEFAULT_CONTEST]optional arguments: -h, --help show this help message and exit -s codeforces,codechef,hackerrank,spoj, --site codeforces,codechef,hackerrank,spoj The competitive programming platform, e.g. codeforces, codechef etc -c CONTEST, --contest CONTEST The name of the contest, e.g. JUNE17, LTIME49, COOK83 etc -p PROBLEM, --problem PROBLEM The problem code, e.g. OAK, PRMQ etc -f, --force Force download the test cases, even if they are cached --run SOURCE_FILE Name of source file to be run --set-default-site codeforces,codechef,hackerrank,spoj Name of default site to be used when -s flag is not specified --set-default-contest DEFAULT_CONTEST Name of default contest to be used when -c flag is not specified --clear-cache Clear cached test cases for a given site. Takes default site if -s flag is omittedDuring installation, the default site is set to codeforces. Youcan change it anytime using the above mentioned flags.
that is the frustrating part about this challenge, then you think you are close because only one test case is missing, but then to solve it a nice way, you have to make changes in which you risk breaking other test cases.
Here is one way to solve the problem; I did my best to document this appropriately. This passes all test cases. If you find anything odd or confusing, please let me know. The call to str in the last part of the method is silly, but I had to add it in order to make my linter happy .
hjr265 maybe a thrid option is needed. Reveal test cases after solve? My vote is 50% reveal test cases and 50% reveal after solving. And of course I will am vouching for suggest test cases feature. However, that should be limited to solvers.
Lol. Although I thought that revealing Test cases after solving would be the right Idea, I voted against revealing Test Cases as the first person quickly to draw crowd, Haha. Thought that If the initial vote was not cast people would just blindly vote in agreement, Lol.
This website provide the test case which is affected by WA or TLE.As well as, it also provides the test cases in the contests. If these big websites can reveal test cases then why not toph? I said they just have to reveal half of the test case which is useful to go over all the test cases.Otherwise, It will nothing but an annoying matter
I think Toph could adopt a similar approach. If Toph revealed all the test cases when someone submits, it might not be as effective. But if Toph showed all the test cases leading up to the failed one, it would be much more helpful and user-friendly.
A variety of educational platforms have risen to serve this need, giving users vast libraries of problems to test their coding abilities and industry knowledge, with a range of pricing models, question types, and domain focuses. As we look to get a role in Data Science, which ones best suit our needs? Let's dive into the battle of LeetCode vs HackerRank vs StrataScratch and find out.
A quick look at LeetCode shows why it is such a popular platform. Out of the 3 platforms we will dig into in this article, Leetcode has the most fleshed-out and user-friendly UI, with a clean interface and a variety of topics to choose from and dig into. The code editor is also extremely advanced, with customizations for themes, key bindings, and font size, in addition to an analysis of memory used and required runtime for the code you write. This is on top of other minor conveniences, such as the ability to adjust the amount of space the code block takes up while keeping the question in view, as well as the ability to add custom test cases to test during your submission.
HackerRank is 100% free to use for developers, or users trying out coding questions to prepare for interviews. Instead, HackerRank is a popular platform for companies to use in their interview process, and uses those companies as its paying customers. The customer base includes over two thousand companies, including over 25% of the Fortune 100. This means that familiarizing yourself with the HackerRank platform is an important step in the interview process, as many data science companies do use HackerRank for their technical tests.
f448fe82f3
Those familiar with HackerRank must be aware that often in coding tests you are asked to write code for a given question and the code must successfully pass a number of test cases. Some of these test cases have their Inputs and Outputs hidden from the test taker.
hackerrank test cases download
Download https://t.co/6MZO6Skp7Q
Yesterday, I came across a similar situation when I wrote a code for a question and it passed one of the given test cases but failed some others. The test case passed was the only one with visible input. The others were hidden. This made it incredibly difficult for me to debug my code. For what I could see, it worked just as expected.
One of the test cases however threw a run-time exception in JVM. The error was a NumberFormatException caused when my code apparently tried to convert a String of sort "abgjhlkpgsban 8080 0" into an integer. My code was expecting an integer as an input over here but the input seemed to be something entirely different. I hardly had the time to fix my code at this point as the test was about to end in a few seconds. Alas !
Later however, when I was pondering about the error, I came up with this idea of how one can use the JVM to deliberately throw Exceptions and know what the input test cases exactly are. Here, I share the same with you.
How does this work ? It's simple - STDERR is used for displaying errors by default and while STDIN and STDOUT are hidden from you, STDERR is not. This is to facilitate the test taker in knowing about the compile-time/run-time errors in their code.
I can't figure out how to get my code to pass all 15 test cases in hacker rank for the mini max sum test. The goal is to sum 4 out of the 5 integers and find the lowest and highest value and print them. My problem is with cases with really large integers. i know i have to make it 64 bit but i put int() around everything and it still won't work. what am i missing?
Output received after running the HackerRank test case :
No test case passed. Use print or log statements to debug why your hidden test cases are failing. Hidden test cases are used to evaluate if your code can handle different scenarios, including corner cases.
I know very little about HackerRank or how it works, but I wonder if the instructions have a capitalization typo, given that the name of the book should be Scala for the Impatient. I could imagine that the test case is actually looking for that, and the person writing the instructions got it wrong.
Originally, we put this simple question at the beginning of a test for warm-up. We received that answer from a candidate in our first batch of applicants. It was quite puzzling, what are the odds that someone would come up with an algorithm that convoluted if given only the text from the question? A quick investigation quickly revealed the source.
If anything, this article makes HackerRank better and more relevant. Now a test is about looking for help on Google and fixing subtly broken snippets of unindented code written in the wrong language.
Sorry but all of that complaints are valid against HackerRank.
Latest example, World CodeSprint 12 competition there that finished last Saturday. Was taking part too.
Take a look at what people are discussing in one of the problems:
-codesprint-12/challenges/factorial-array/forum
Basically there are problems with (hidden) test cases and meeting the performance expectations.
Which is caused by not using the right algorithm/trick and banging the head against the wall trying to improve it instead of going for different algorithm (the one the author of the task had in mind). And that is due to inexperience with the platform (not being aware that timing out test cases mean wrong algorithm) and also partially to the time limit for the competition, that makes one not wanting to start one of the tasks from the scratch again when there are others pending.
I have one question and i have writted down it on hackerrank but all the test cases gets failed , i have attached the images question please help
WhatsApp Image 2023-09-09 at 2.18.29 PM771856 81.5 KB
As a student still, my wild guess is if the code is compiled successfully, it is then test against a test suite specific for Java (I'm picturing a bunch of JUnit tests lol). Perhaps it is a separate microservice which handles the testing and keeping track of the metrics (such as memory usage, how many test cases passed, etc.)?
If so, this would mean each Leetcode question has multiple test suites, with each of them testing for the same test cases but just written in different languages (i.e. JUnit tests for Java, unittest for Python, etc.). I haven't given this a lot of thought, but I'm under the impression this could work. However, would this be the right way of solving such kind of software engineering problem?
Edit: Not asking specifically about Leetcode/HackerRank, but rather from a general software engineering standpoint, if its possible to test in a language agnostic way instead of writing separate test suites for different languages.
If you notice, most of these systems are setup in such a way that you're going to get some well known string input and have to produce some well known string output. At that point, they can take your code and run it as a plain old executable (in some highly disposable sandbox), testing via stdin and stdout while ignoring what language actually created the binary.
CodeforcesCodechefSpojHackerrankAtcoderSupported languagesCC++PythonJavaRubyHaskellInstallationBuild from sourcegit clone cd ACedItpython setup.py installAs a Python packagepip install --user ACedItUsageusage: acedit [-h] [-s codeforces,codechef,hackerrank,spoj] [-c CONTEST] [-p PROBLEM] [-f] [--run SOURCE_FILE] [--set-default-site codeforces,codechef,hackerrank,spoj] [--set-default-contest DEFAULT_CONTEST]optional arguments: -h, --help show this help message and exit -s codeforces,codechef,hackerrank,spoj, --site codeforces,codechef,hackerrank,spoj The competitive programming platform, e.g. codeforces, codechef etc -c CONTEST, --contest CONTEST The name of the contest, e.g. JUNE17, LTIME49, COOK83 etc -p PROBLEM, --problem PROBLEM The problem code, e.g. OAK, PRMQ etc -f, --force Force download the test cases, even if they are cached --run SOURCE_FILE Name of source file to be run --set-default-site codeforces,codechef,hackerrank,spoj Name of default site to be used when -s flag is not specified --set-default-contest DEFAULT_CONTEST Name of default contest to be used when -c flag is not specified --clear-cache Clear cached test cases for a given site. Takes default site if -s flag is omittedDuring installation, the default site is set to codeforces. Youcan change it anytime using the above mentioned flags.
that is the frustrating part about this challenge, then you think you are close because only one test case is missing, but then to solve it a nice way, you have to make changes in which you risk breaking other test cases.
Here is one way to solve the problem; I did my best to document this appropriately. This passes all test cases. If you find anything odd or confusing, please let me know. The call to str in the last part of the method is silly, but I had to add it in order to make my linter happy .
hjr265 maybe a thrid option is needed. Reveal test cases after solve? My vote is 50% reveal test cases and 50% reveal after solving. And of course I will am vouching for suggest test cases feature. However, that should be limited to solvers.
Lol. Although I thought that revealing Test cases after solving would be the right Idea, I voted against revealing Test Cases as the first person quickly to draw crowd, Haha. Thought that If the initial vote was not cast people would just blindly vote in agreement, Lol.
This website provide the test case which is affected by WA or TLE.As well as, it also provides the test cases in the contests. If these big websites can reveal test cases then why not toph? I said they just have to reveal half of the test case which is useful to go over all the test cases.Otherwise, It will nothing but an annoying matter
I think Toph could adopt a similar approach. If Toph revealed all the test cases when someone submits, it might not be as effective. But if Toph showed all the test cases leading up to the failed one, it would be much more helpful and user-friendly.
A variety of educational platforms have risen to serve this need, giving users vast libraries of problems to test their coding abilities and industry knowledge, with a range of pricing models, question types, and domain focuses. As we look to get a role in Data Science, which ones best suit our needs? Let's dive into the battle of LeetCode vs HackerRank vs StrataScratch and find out.
A quick look at LeetCode shows why it is such a popular platform. Out of the 3 platforms we will dig into in this article, Leetcode has the most fleshed-out and user-friendly UI, with a clean interface and a variety of topics to choose from and dig into. The code editor is also extremely advanced, with customizations for themes, key bindings, and font size, in addition to an analysis of memory used and required runtime for the code you write. This is on top of other minor conveniences, such as the ability to adjust the amount of space the code block takes up while keeping the question in view, as well as the ability to add custom test cases to test during your submission.
HackerRank is 100% free to use for developers, or users trying out coding questions to prepare for interviews. Instead, HackerRank is a popular platform for companies to use in their interview process, and uses those companies as its paying customers. The customer base includes over two thousand companies, including over 25% of the Fortune 100. This means that familiarizing yourself with the HackerRank platform is an important step in the interview process, as many data science companies do use HackerRank for their technical tests.
f448fe82f3
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