HackerEarth | Solutions to HackerEarth problems | Learning library

 by   ad1992 Java Version: Current License: No License

kandi X-RAY | HackerEarth Summary

kandi X-RAY | HackerEarth Summary

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

Solutions to HackerEarth problems

            kandi-support Support

              HackerEarth has a low active ecosystem.
              It has 30 star(s) with 34 fork(s). There are 3 watchers for this library.
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 12 days. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of HackerEarth is current.

            kandi-Quality Quality

              HackerEarth has 0 bugs and 0 code smells.

            kandi-Security Security

              HackerEarth has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              HackerEarth code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              HackerEarth does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              HackerEarth releases are not available. You will need to build from source code and install.
              HackerEarth has no build file. You will be need to create the build yourself to build the component from source.
              HackerEarth saves you 4151 person hours of effort in developing the same functionality from scratch.
              It has 8815 lines of code, 253 functions and 196 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed HackerEarth and discovered the below as its top functions. This is intended to give you an instant insight into HackerEarth implemented functionality, and help decide if they suit your requirements.
            • Main function for testing
            • Sorts the merges in a sorted array
            • Merge an array
            • Main method
            • Merge two arrays
            • Simple test for testing
            • Calculate extended distance between two values
            • Utility function to generate ramanujan numbers
            • Main entry point
            • Utility method to add strings
            • Demonstrates how to run on the System
            • Command - line tool
            • Main method for testing
            • Main function for testing
            • Auxiliary method for testing
            • Command line reader
            • Command - line tool for testing
            • Main entry point for testing
            • Command - line parser
            • Main method for testing
            • Command line parser
            • Test program
            • Main method for testing purposes
            • Entry point for debugging
            Get all kandi verified functions for this library.

            HackerEarth Key Features

            No Key Features are available at this moment for HackerEarth.

            HackerEarth Examples and Code Snippets

            No Code Snippets are available at this moment for HackerEarth.

            Community Discussions


            I want to practice hacking, where can I do it?
            Asked 2021-Jun-11 at 09:01

            What sites help me to increase my hacking skills, I'm a newbie, for coding there are hackerrank, hackerearth, codeforces, codechef etc, like those what are there to learn hacking?



            Answered 2021-Jun-11 at 09:01

            I would say CTF challenges are a good way to learn. https://tryhackme.com/ is a good place to start. Most of the rooms are aimed at beginners and it will give you a good understanding, of some of the programs you will use like nmap, burpsuite and wireshark. https://www.hackthebox.eu/ is a good place, when you are a bit more experienced.

            I am also gonna share some GitHub links, you might find interesting:

            Source https://stackoverflow.com/questions/67914584


            How to take an array of size N?
            Asked 2021-Jun-04 at 14:47

            I am working on to improve my coding skill.
            So I joined hackerearth to solve coding problems in PHP language because I know PHP.
            But on the very first question I got stuck because I don't know how to take input as an array of size N.

            The problem on which I am stuck is given below -
            Coding challenge -
            Monk loves to preform different operations on arrays, and so being the principal of Hackerearth School, he assigned a task to his new student Mishki. Mishki will be provided with an integer array A of size N and an integer K , where she needs to rotate the array in the right direction by K steps and then print the resultant array. As she is new to the school, please help her to complete the task.

            What I have tried to solve the problem-
            As this problem ask for 3 inputs - First the number of test cases (T).
            Second is the size of the array (N) and number of rotation (K).
            Third array of size N.
            So I have successfully passed the first test case (code is given below)-



            Answered 2021-Jun-04 at 14:47

            Some thoughts:

            First, fscanf will return an array if you only pass the stream and the format, you don't need to assign the variables and then construct your own array.

            Given that this is the case, you should be able to complete the assignment by generating your format string for fscan by adding elements based on the $n that was derived from above, so something like this should work:

            Source https://stackoverflow.com/questions/67830995


            Find maximum Prime Difference between Range using R ( HackerEarth )
            Asked 2021-Jun-03 at 10:52


            Find maximum difference between the prime numbers in the given range. [L,R]


            Range: [ 1, 10 ] The maximum difference between the prime numbers in the given range is 5.

            Difference = 7 - 2 = 5

            Range: [ 5, 5 ] There is only one distinct prime number so the maximum difference would be 0.

            Range: [ 8 , 10 ] There is no prime number in the given range so the output for the given range would be -1.

            Range: [ 2 - 7 ] . This should return 5. [ 7 - 2 ] = 5

            R Code :

            The below R code works fine in R studio for all input I have passed. But when I ran the similar code in hackerEarth Env. Getting Errors



            Answered 2021-Jun-03 at 10:52

            Yes, there is. Your algorithm searches for all primes in the interval. Let's consider the range between 1 and 1 000 000. That means that you will check for 1 000 000 numbers whether they are prime. That uses up a lot of storage resources, you unnecessarily store the primes between 1 and 1 000 000. It also wastes a lot of computational resources, since you unnecessarily compute this 1 000 000 times.

            Instead, a much more efficient way to do this both in terms of storage and computation efficiency is to:

            • find the first prime in the range via a loop starting from 2 (because 1 is not a prime, no need for check whether it's prime) and which stops when the first prime is found
            • find the last prime in the range via a loop starting from total backwards (total, total - 1, ...) until you find the last prime and then the loop stops
            • with the two very efficient loops above, you will know the first and the last prime if they exist
            • if there is a first and a last prime, then compute their difference, otherwise return a default value, like 0

            Excuse me for not writing code for you, but I'm not fluent in R.

            Source https://stackoverflow.com/questions/67819288


            Fredo and Array Update in python
            Asked 2021-May-26 at 20:38

            I will have an interview with a company which like the hackerearth.com. I don't know how to work and doing the code perfectly. Could you help me with the following example? This is the example for the .hackerearth.com, however, I don't know that I should consider the constraint in the code? can I use a package like NumPy? or I should only use the basic calculation with my self? Could you check my response and let me know the problem with that? Thank you so much

            Input Format:

            First line of input consists of an integer N denoting the number of elements in the array A. Second line consists of N space separated integers denoting the array elements.

            Output Format:

            The only line of output consists of the value of x.

            Input Constraints: 1<100



            An initial sum of array is 1+2+3+4+5=15 When we update all elements to 4, the sum of array which is greater than 15 . Note that if we had updated the array elements to 3, which is not greater than 15 . So, 4 is the minimum value to which array elements need to be updated.



            Answered 2021-May-26 at 19:53

            yes you can use the Numpy and other well-known packages. Your code seems ok.

            Source https://stackoverflow.com/questions/67711628


            Modulo strength , want explanation in the algorithm used to compute the answer
            Asked 2021-May-18 at 06:23

            I was trying to solve the problem Modulo strength at hackerearth ,
            https://www.hackerearth.com/practice/basic-programming/implementation/basics-of-implementation/practice-problems/golf/modulo-strength-4/ ,
            so basically we have to find all such pairs of no. (say i,j) such that A[i]%k=A[j]%k where k is a no. given in the question ,
            i tried brute force approach and got time limit exceeded at some of the last test cases and
            in the discussion tab i found a code which is working but i couldn't understand what exactly it does, and the underlying thinking behind the algorithm used.



            Answered 2021-May-18 at 06:18

            Let's first go through with the purpose of every variable in the code.

            The purpose of n,k,s is explicitly given. a[n] is for reading the numbers in array. std::vectorv(k,0) stores k sized vector of 0's, and v[i] indicates the number of variables in a[n] for which a[j]%k==i.

            In the last loop, the following has done. The number of pairs that can be constructed with n elements is n*(n-1) (basic combinatorics), and if we have v[i] numbers for which the condition is satisfied and a[j]%k==i the number of pairs that can be constructed is v[i]*(v[i]-1). The loop sums up the number of pairs for every remnant i.

            Source https://stackoverflow.com/questions/67580619


            Minimum XOR problem, exceeds the time limit and gives different answers in few cases
            Asked 2021-Apr-25 at 21:41

            I am trying to solve the Minimum AND xor OR problem (here) from the hacker rank, it runs well in the sample case but in the 1st input case scenario where the number of test case(T) is 1000 it provides 20 wrong answers
            Ex.: The input array of 10 numbers [853, 864, 10, 547, 954, 235, 822, 429, 628, 569] gives the result 53 while the correct ans is 26. (rest 980 are correct), and in rest of the input case scenario the time limits exceeds. I tried to debug but am hitting the dead-end.
            Is there any way to make it more feasible, apart from using different sorting method(like qsort) ?



            Answered 2021-Apr-25 at 21:07

            Both problems, the erroneous results and the time limit exceeded, appear to be caused by this routine:

            Source https://stackoverflow.com/questions/67251966


            Suffixes of a string that are also prefix of the same string in O(n)
            Asked 2021-Mar-11 at 14:04

            Recently, I encountered a problem on the HackerEarth platform, the main idea for solving the problem was to find which suffixes of a string are also the same string's prefix in linear time(in size of string). For example, in string "abcdzyabc", "abc" is a suffix of the string and it is also its prefix. We need to find all such suffixes in linear time.

            Now say I have a boolean array, isSuffixPrefix? of size n i.e. the length of the string str. isSuffixPrefix?[i] is true if the suffix of string str starting at index i i.e. suffix str[i...n-1] is also a prefix of the same string str, it is false otherwise. How can we compute this array in linear time (if possible)?

            An example for string s = "aaa":



            Answered 2021-Mar-11 at 14:04

            your problem is not exactly the prefix function cause the prefix function is defined as an array π of length n, where π[i] is the length of the longest proper prefix of the substring s[0…i] which is also a suffix of this substring and not the whole string but you can tweak a bit the function to get what you want. because prefix function is from [0..i] you can reverse the word you want and it would give you the array from [n...i] but also you would need to reverse the array itself:

            Source https://stackoverflow.com/questions/66570170


            Number of setbits(x or y) + Number of setbits(x and y) = m. Is there any way to solve this equation, to find relation between x and y?
            Asked 2021-Mar-03 at 12:54

            I have been asked one question in the HackerEarth coding platform, to find pairs x and y from the arrays that satisfy the above equation.



            Answered 2021-Mar-03 at 12:54

            There is a useful property of setbits:

            Source https://stackoverflow.com/questions/66457128


            Why is break used here to break out of if statement
            Asked 2021-Feb-09 at 09:44

            Why is break used here to break out of if statement? Is it allowed?

            And why are x and y made 0 at the end? x = 0; y = 0




            Answered 2021-Feb-09 at 09:44

            break doesn't exit the if statement, it exits the inner-most loop. it is most certainly allowed, break is only useful inside an if or switch statement.

            x and y need to be reset to zero every time the outermost 'q' loop runs. A clearer way to organize the code would have been to put each local variables inside its smallest possible scope, and name the variables appropriately to help readability. i.e. x=>n_upper_vowels,y=>n_lower_vowels etc.

            Source https://stackoverflow.com/questions/66109268


            Dijkstra time complexity with C++ pq
            Asked 2021-Jan-29 at 20:46

            Dijkstra time complexity is O(V+ElogV) with binary heaps.

            But, C++ pq(if used as binary heap), does not support decrease key. One solution suggested is to just insert the same vertex again in pq with decreased distance. For, ex:

            From: https://www.hackerearth.com/practice/algorithms/graphs/shortest-path-algorithms/tutorial/



            Answered 2021-Jan-29 at 20:46

            Those bounds are actually equivalent for simple connected graphs. Since

            Source https://stackoverflow.com/questions/65960997

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


            No vulnerabilities reported

            Install HackerEarth

            You can download it from GitHub.
            You can use HackerEarth 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 HackerEarth 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 .


            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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