HackerRank | Solution to HackerRank problems | Learning library

by alexprut Java Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | HackerRank Summary

HackerRank is a Java library typically used in Tutorial, Learning, Example Codes applications. HackerRank has no vulnerabilities, it has a Permissive License and it has low support. However HackerRank has 5 bugs and it build file is not available. You can download it from GitHub.

. [MIT] .

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Quality

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HackerRank has a low active ecosystem.

It has 113 star(s) with 104 fork(s). There are 11 watchers for this library.

It had no major release in the last 6 months.

HackerRank has no issues reported. There are 4 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of HackerRank is current.

Quality

HackerRank has 5 bugs (4 blocker, 0 critical, 1 major, 0 minor) and 2371 code smells.

Security

HackerRank has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

HackerRank code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

HackerRank is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

HackerRank releases are not available. You will need to build from source code and install.

HackerRank has no build file. You will be need to create the build yourself to build the component from source.

HackerRank saves you 3362 person hours of effort in developing the same functionality from scratch.

It has 7211 lines of code, 415 functions and 243 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed HackerRank and discovered the below as its top functions. This is intended to give you an instant insight into HackerRank implemented functionality, and help decide if they suit your requirements.

Knips the obstacle
Simple test to stdin .
Adds word to trie .
Get a list ofStudents from a string .
Performs the reduction .
Pick numbers in ascending order .
Compute divisor n .
Counts the number of elements in the array
Return true if n is prime .
Checks the prime .

Get all kandi verified functions for this library.

HackerRank Key Features

No Key Features are available at this moment for HackerRank.

HackerRank Examples and Code Snippets

No Code Snippets are available at this moment for HackerRank.

Community Discussions

Trending Discussions on HackerRank

Optimizing function in Python to handle a big chunk od data

Two Identical Tables Yields Different DP results

Javascript Mini-Max Sum HackerRank problem returns wrong sum?

How to optimise Haskell code to pass HackerRanks timed out test cases (Not for any ongoing competition, just me practicing)

getting diffrent results from a hackerrank bash practice than my acutal bash

Find the number of substring of a string that satisfy a criteria

How to return int if BigInteger is too big for int?

PL SQL output in hackerrank

Why does `read` return a symbol when `read-line` returns a string

Is using too many IF statements a problem? SWIFT

QUESTION

Optimizing function in Python to handle a big chunk od data

Asked 2022-Jan-13 at 16:55

I tried solving a problem on HackerRank, called 'Apple and orange', here's the code:

...

ANSWER

Answered 2022-Jan-12 at 18:37

Checking each apple/orange against each coordinate in range turns your code's runtime complexity into O(n * a + n * o) where n is the length of the house, a is the number of the apples and o is the number of oranges. Ideally, your code must run in O(a + o).

Here's a refactored version of your solution:

Source https://stackoverflow.com/questions/70686292

QUESTION

Two Identical Tables Yields Different DP results

Asked 2021-Dec-29 at 21:37

I was solving a Hackerrank problem that is just a plain implementation of Longest Common Subsequence

...

ANSWER

Answered 2021-Dec-29 at 21:37

This is one of the classic Python blunders. You cannot initialize a 2D array using the * operator, like x = [[0]*5]*5. The REASON is that this gives you a list that contains 5 references to the SAME [0,0,0,0,0] list, They aren't 5 independent lists. If you change x[0][3], you will also change x[1][3] and x[2][3]. Try setting x[2][2] = 9 and y[2][2] = 9 and notice the difference.

Source https://stackoverflow.com/questions/70525206

QUESTION

Javascript Mini-Max Sum HackerRank problem returns wrong sum?

Asked 2021-Nov-28 at 23:44

I've been pulling my hair out trying to figure out what I'm doing wrong. In the HackerRank problem, Mini-Max Sum the question is to find the sum of part of an array of 5 numbers. In the example they give you, they show you arr = [1,2,3,4,5] the minimum sum would be 1+2+3+4 = 10 and the maximum sum would be 2+3+4+5 = 14

I'm still new so solving the problem is still sometimes a challenge for me. I came up with this for my first solution:

...

ANSWER

Answered 2021-Nov-28 at 03:44

In the question, It is not specified whether the input array will be sorted or not, So the only thing that you are missing is to sort the array in descending order.

1) You can first sort the array in ascending order

Source https://stackoverflow.com/questions/70140159

QUESTION

How to optimise Haskell code to pass HackerRanks timed out test cases (Not for any ongoing competition, just me practicing)

Asked 2021-Oct-06 at 16:58

I been learning Haskell for around 4 months now and I have to say, the learning curve is definitely hard(scary also :p).

After solving about 15 easy questions, today I moved to my first medium difficulty problem on HackerRank https://www.hackerrank.com/challenges/climbing-the-leaderboard/problem.

It was 10 test cases and I am able to pass 6 of them, but the rest fail with timeout, now the interesting part is, I can already see a few parts that have potential for performance increase, for example, I am using nub to remove duplicated from a [Int], but still I am not able to build a mental model for algorithmic performance, the main cause of that being unsure about Haskell compiler will change my code and how laziness plays a role here.

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ANSWER

Answered 2021-Oct-06 at 13:20

First, to answer your questions:

Yes, duplicateRemovedRankings is computed only once. No repeated computation.
To debug-trace, you can use trace and its friends (see the docs for examples and explanation). Yes, it can be used even in pure, non-IO code. But obviously, don't use it for "normal" output.
Yes, your understanding of complexity is correct.

Now, how to pass HackerRank's tricky tests.

First, yes, you're right that nub is O(N^2). However, in this particular case you don't have to settle for that. You can use the fact that the rankings come pre-sorted to get a linear version of nub. All you have to do is skip elements while they're equal to the next one:

Source https://stackoverflow.com/questions/69465400

QUESTION

getting diffrent results from a hackerrank bash practice than my acutal bash

Asked 2021-Oct-03 at 00:13

I have been doing some hackerrank practices, mainly about the grep shell command. The challenge asks me to detect a pattern on bank cards number, which is to detect pair of numbers next to each other, or with a space in between. Here is an example of the pattern :

5678 9101 1234

2[9][9][9] 5178 9101 234

[9][9][9][9] 5628 9201 1232

I tried this ERE regex which gives the appropriate output on my bash :

...

ANSWER

Answered 2021-Oct-03 at 00:13

For some reason, Hackerrank requires the use of POSIX BRE here.

You can use

Source https://stackoverflow.com/questions/69408459

QUESTION

Find the number of substring of a string that satisfy a criteria

Asked 2021-Sep-26 at 00:55

Question: Given a string a, find the number of subsegments of the string that contain at least one vowel AND one consonant. For example : input "blue" will have number of subsgments = 1, "hackerrank" will return number of segments = 3 ("ha","cker","rank") each will contain at least one consonant and one vowel.

Here is my code in Java

...

ANSWER

Answered 2021-Sep-26 at 00:55

Try this, I think it will work

Source https://stackoverflow.com/questions/69330993

QUESTION

How to return int if BigInteger is too big for int?

Asked 2021-May-31 at 01:26

i'm currently trying to solve a HackerRank problem, the problem in question is called Fibonacci Modified.

The method returns an int but it is expected that I will be obtaining huge values. I'm solving this problem in Java.

Here is my code

...

ANSWER

Answered 2021-May-31 at 01:26

You cannot, the maximum value for int is 2,147,483,647 (32 bits of value). If you need big numbers you must use the appropriate variable type.

If for some reason you want to avoid BigInteger at all and your are not going to do any arithmetic operation later, you can always return a String

About the hackerrank problem, just modify the result variable type to BigInteger. Actually, they seem to be aware of the 32/64 bits issue... they are using a String value to prevent it.

There's no reason to keep the whole code-template structure. They just care about input/output. You are allowed to modify EVERYTHING but those two things.

This is their input:

This is their output (here you can see their output is expected to be a String):

Source https://stackoverflow.com/questions/67754737

QUESTION

PL SQL output in hackerrank

Asked 2021-Mar-26 at 14:23

set serveroutput on;
DECLARE
I NUMBER;
J NUMBER;
BEGIN
FOR I IN REVERSE 1..20
LOOP
    FOR J IN 1..I
    LOOP
    DBMS_OUTPUT.PUT('* ') ; -- printing *
    END LOOP;
    DBMS_OUTPUT.NEW_LINE; -- for new line
END LOOP;
END;

...

ANSWER

Answered 2021-Mar-21 at 10:40

That site doesn't seem to ever show your the output from your submission, unhelpfully, but does with just 'run code'. Surprisingly it does seem to understand PL/SQL; and even more surprisingly it handles the set serveroutput on, which is a SQL\Plus/SQL Developer client command.

But you need to add a terminating / after your code, on a line on its own - again, just like SQL*Plus (though SQL Developer is sometimes doesn't complain):

Source https://stackoverflow.com/questions/66720484

QUESTION

Why does `read` return a symbol when `read-line` returns a string

Asked 2021-Feb-19 at 21:29

I'm learning Clojure by following the Hackerrank 30 days of code, and lost some hours due to a behavior I neither understand nor found any documentation or explanation about:

(read) returns a symbol:
...

ANSWER

Answered 2021-Feb-19 at 10:11

You can find the Clojure API documentation at https://clojure.github.io/clojure/clojure.core-api.html. Both read and read-line are there.

Your specific goal isn't quite clear, but in general, application software prefers read-line and parses the results in whatever way makes sense... perhaps with re-matches for regular expressions. Clojure itself reads program code with read.

Source https://stackoverflow.com/questions/66273766

QUESTION

Is using too many IF statements a problem? SWIFT

Asked 2021-Feb-17 at 11:14

I am currently completing a challenge on hacker rank called compare the triplets (https://www.hackerrank.com/challenges/compare-the-triplets/problem), and I was just wondering if using too many IF statements is considered bad programming practice? What are the alternatives other than using switch statements. Please see my code solution below :

...

ANSWER

Answered 2021-Feb-17 at 11:14

This will expand a lot if you will have more and more elements in arrays you send.

Why not try something like

Source https://stackoverflow.com/questions/66240499

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install HackerRank

You can download it from GitHub.
You can use HackerRank like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the HackerRank component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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