Hackerrank - Find Hackerrank

Problem Statement
A description of the problem can be found on Hackerrank.

Solution
Print “0” if the input matches ^hackerrank$ or ^hackerrank.*hackerrank$
Print “1” if the input matches ^hackerrank.*
Print “2” if the input matches .*hackerrank$
else print “-1”

I created solution in:

Java
JavaScript
Scala
Ruby

All solutions are also available on my GitHub.

Java

import java.util.*;

public class FindHackerrank {

    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);
        int tests = Integer.parseInt(stdin.nextLine());
        for(int i = 0; i < tests; i++) {
            String input = stdin.nextLine();
            System.out.println(findHackerrank(input));
        }
        stdin.close();
    }

    private static int findHackerrank(String line) {
        if(line.matches("^hackerrank$") || line.matches("^hackerrank.*hackerrank$"))
            return 0;
        else if(line.matches("^hackerrank.*"))
            return 1;
        else if(line.matches(".*hackerrank$"))
            return 2;
        else
            return -1;
    }
}

import java.util.*;

public class FindHackerrank {

public static void main(String[] args) {

Scanner stdin = new Scanner(System.in);

int tests = Integer.parseInt(stdin.nextLine());

for(int i = 0; i < tests; i++) {

String input = stdin.nextLine();

System.out.println(findHackerrank(input));

}

stdin.close();

}

private static int findHackerrank(String line) {

if(line.matches("^hackerrank$") || line.matches("^hackerrank.*hackerrank$"))

return 0;

else if(line.matches("^hackerrank.*"))

return 1;

else if(line.matches(".*hackerrank$"))

return 2;

else

return -1;

}

JavaScript

'use strict';

let findHackerrank = line => {
    if(line.match(/^hackerrank$/) || line.match(/^hackerrank.*hackerrank$/))
        return "0";
    else if(line.match(/^hackerrank.*/))
        return "1";
    else if(line.match(/.*hackerrank$/))
        return "2";
    else
        return "-1";
};

const processData = input => {
    let lines = input.split('\n').slice(1);
    console.log(lines.filter(line => line.match(/[a-z]+/)).map(findHackerrank).join('\n'))
};

process.stdin.resume();
process.stdin.setEncoding("ascii");

var _input = "";
process.stdin.on("data", input => _input += input);
process.stdin.on("end", () => processData(_input));

'use strict';

let findHackerrank = line => {

if(line.match(/^hackerrank$/) || line.match(/^hackerrank.*hackerrank$/))

return "0";

else if(line.match(/^hackerrank.*/))

return "1";

else if(line.match(/.*hackerrank$/))

return "2";

else

return "-1";

};

const processData = input => {

let lines = input.split('\n').slice(1);

console.log(lines.filter(line => line.match(/[a-z]+/)).map(findHackerrank).join('\n'))

};

process.stdin.resume();

process.stdin.setEncoding("ascii");

var _input = "";

process.stdin.on("data", input => _input += input);

process.stdin.on("end", () => processData(_input));

Scala

import scala.io.Source

object FindHackerRank extends App {
  val lines = Source.stdin.getLines().drop(1)
  val outputNums = lines.map(findHackerrank)
  println(outputNums.mkString("\n"))

  def findHackerrank(line: String): Int = {
    if(line.matches("^hackerrank$") || line.matches("^hackerrank.*hackerrank$"))
      0
    else if(line.matches("^hackerrank.*"))
      1
    else if(line.matches(".*hackerrank$"))
      2
    else
      -1
  }
}

import scala.io.Source

object FindHackerRank extends App {

val lines = Source.stdin.getLines().drop(1)

val outputNums = lines.map(findHackerrank)

println(outputNums.mkString("\n"))

def findHackerrank(line: String): Int = {

if(line.matches("^hackerrank$") || line.matches("^hackerrank.*hackerrank$"))

else if(line.matches("^hackerrank.*"))

else if(line.matches(".*hackerrank$"))

else

-1

}

Ruby

gets.chomp.to_i.times do
  input = gets.chomp.to_s
  if input =~ /^hackerrank$/ || input =~ /^hackerrank.*hackerrank$/ 
    puts "0"
  elsif input =~ /^hackerrank.*/
    puts "1"
  elsif input =~ /.*hackerrank$/
    puts "2"
  else
    puts "-1"
  end
end

gets.chomp.to_i.times do

input = gets.chomp.to_s

if input =~ /^hackerrank$/ || input =~ /^hackerrank.*hackerrank$/

puts "0"

elsif input =~ /^hackerrank.*/

puts "1"

elsif input =~ /.*hackerrank$/

puts "2"

else

puts "-1"

end

Pavol Pidanič

I can count to 1023 with 10 fingers

Hackerrank – Find Hackerrank