Hacker Rank Script to automate submission

hacker-rank-candies.sh

#!/bin/bash

# Hacker Rank at https://www.hackerrank.com/ 
# Hacker rank Candies game was Puzzle 1 released on 30 June 2012 . 

# If you are using Ruby 1.8 . make sure you install json . Ruby 1.9 comes with json.

csrf="SET_THIS"
cookie="_hackerrank_session=SET_THIS_AS_WELL"

mkdir answers
function startGame() {
  curl -s -D header -o output -X POST -H "X-CSRF-Token:$csrf" -H "X-Requested-With:XMLHttpRequest" -H "Cookie: $cookie" --data "n=$1"  https://www.hackerrank.com/splash/challenge.json
  val=`getCurrent output`
  playGame `expr $val % 6` `getGameId header` $1

}
function playGame() {
  curl -s -D header -o output -X PUT -H "X-CSRF-Token:$csrf" -H "X-Requested-With:XMLHttpRequest" -H "Cookie: $cookie;game=$2" --data "move=$1" https://www.hackerrank.com/splash/challenge.json

  if [[ `getGameExited output` == "0" ]]
  then
    echo "Game over"
    moved=`cat moved`
    gameId=`getGameId header-last`
    echo $gameId > answers/$3-$moved
    # game completed, start next
  else
    # continue game
    val=`getGameCurrent output`
    /bin/cp -f header header-last
    echo $val
    toMove=`expr $val % 6`
    echo $toMove > moved
    echo "Picking $toMove"
    playGame $toMove `getGameId header` $3
  fi
}

function getGameId() {
  grep "Set-Cookie: game" $1 | cut -f1 -d";"|cut -f2 -d"="
}

function getCurrent() {
  ruby_cmd="require 'rubygems'; require 'json'; puts JSON.parse(File.read(\"$1\"))['current']"
  ruby -e "$ruby_cmd"
}

function getGameCurrent() {
  ruby_cmd="require 'rubygems'; require 'json'; puts JSON.parse(File.read(\"$1\"))['game']['current']"
  ruby -e "$ruby_cmd"
}
function getGameExited() {
  ruby_cmd="require 'rubygems'; require 'json'; puts JSON.parse(File.read(\"$1\"))['exit']"
  ruby -e "$ruby_cmd"
}

# for i in `seq 7 2560`
# do
#   if [[ `expr $i % 6` -ne 0 ]]
#   then
#     echo $i
#     startGame $i
#   fi
# done

hacker-rank.js.coffee

# Hacker Rank at https://www.hackerrank.com/ 
# Hacker rank Candies game was Puzzle 1 released on 30 June 2012 . 

startRequest = (number) ->
  $.ajax
    url: '/splash/challenge.json'
    data:
      n: number
      remote: 'true'
    type: 'POST'
    success: (data) -> 
      makeIntelligentMove(data.current)
  true
makeIntelligentMove = (number) ->
  # Actual logic to determine the number to move
  numberToMove = number % 6 # we use 6 since 5 is the maximum number to pick
  $.ajax
    url: '/splash/challenge.json'
    data:
      move: numberToMove
      remote: 'true'
    type: 'PUT'
    success: (data) ->
      console.log(data.message)
      unless data.exit == 0
        makeIntelligentMove(data.game.current)
      else
        $.ajax
          url: 'splash/userstats.json'
          success: (data) ->
            console.log('Your score is '+data.score)
        window.currentIndex++
        if window.successCalls.length > window.currentIndex 
          setTimeout(startRequest, 1000, window.successCalls[window.currentIndex])

window.currentIndex = 0
window.successCalls = [7]; # (6..2560).to_a.delete_if{|x| x%6 == 0 } # count is 2129 .
setTimeout(startRequest, 1000, window.successCalls[window.currentIndex])

LICENSE

Copyright (C) 2012, Sairam Kunala

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>

space-x-multi-threading-using-shell.sh

# Hacker Rank at https://www.hackerrank.com/ 
# Hacker rank SpaceX game was Puzzle 2 released on 3 July 2012.
# CheatSheet - The answers vary per user unlike the Candies game. So you cannot use one set of answers for another user if you have any or planning to cheat :) 

# README - The Shell script
# Mind you since this will blow up your CPU and memory depending on the no of parallel jobs you run compared to a single thread of curl.
# With 30 threads on a 512 MB RAM Virt using up 90% memory, it took the memory towards 150% and CPU util from 0% to 400%.
# Process started at Wed Jul  4 12:22:00 IST 2012.
# Process ended at   Wed Jul  4 12:30:10 IST 2012.

csrf="SET_THIS"
cookie="_hackerrank_session=SET_THIS_AS_WELL"
noOfThreads=30 # Change this as per your Compute Engines aka CPU
startQ=1
endQ=10000
answers="answers.txt"
function startDownload {
  func=$1
  startQ=$2
  endQ=$3
  noOfThreads=$4
  for i in `seq $startQ $endQ` ; do
    while [ 1 ]; do
      if [[ `jobs | wc -l` -gt $noOfThreads ]]; then
        sleep 1
      else
        break
      fi
    done
    if [[ -f stop ]]; then
      # touch the file from another shell into this directory in order to stop the executions
      break
    end
    echo $i
    $func $i &
  done
}

function getQuestion {
  i=$1
  curl -s -o q-$i -X POST --data "n=$i" -H "X-CSRF-Token:$csrf" -H "X-Requested-With:XMLHttpRequest" -H "Cookie: $cookie" https://www.hackerrank.com/game.json
}

function submitAnswers {
  answers=$1
  for i in `cat $answers` do 
    splitValueAndSubmit $i
  done
}
function splitValueAndSubmit {
  i=$1
  q=`echo $i|cut -f1 -d,` 
  a=`echo $i|cut -f2 -d,`
  curl -s -X PUT -H "X-CSRF-Token:$csrf" -H "X-Requested-With:XMLHttpRequest" -H "Cookie: $cookie" --data "answer=$a&id=$q" https://www.hackerrank.com/game.json
}

mkdir spacex ; cd spacex
# Part 1 - Downloading questions
startDownload getQuestion $startQ $endQ $noOfThreads

# Part 2 - Run the ruby script to get the awesome answers
ruby ../spacex-figureout-text.rb | grep -v gnoring > $answers

# Part 3 - The final - Submit the data 
# This is the part 3 of winning the game ( Make sure you see part 2 and run it ) 
submitAnswers $answers
cd ..
echo "You did great! That's a lot of effort to run a shell script"

spacex-figure-out-text.rb

require 'json'

$az = ('a'..'z').to_a
$cardinals = {
"one"      => 1    ,
"two"      => 2    ,
"three"    => 3    ,
"four"     => 4    ,
"five"     => 5    ,
"six"      => 6    ,
"seven"    => 7    ,
"eight"    => 8    ,
"nine"     => 9    ,
"ten"      => 10   ,
"eleven"   => 11   ,
"twelve"   => 12   ,
"thirteen" => 13   ,
"fourteen" => 14   ,
"fifteen"  => 15   ,
"sixteen"  => 16   ,
"seventeen"=> 17   ,
"eighteen" => 18   ,
"nineteen" => 19   ,
"twenty"   => 20   ,
"thirty"   => 30   ,
"fourty"   => 40   ,
"forty"    => 40   ,
"fifty"    => 50   ,
"sixty"    => 60   ,
"seventy"  => 70   ,
"eighty"   => 80   ,
"ninety"   => 90   ,
"hundred"  => 100  ,
"thousand" => 1_000 ,
"and"      => 0,
"zero"     => 0, # there was some guy who thought of this
"million"  => 1_000_000 , # and none who thought of this
}

def chipher(str,diff)
  az = $az
  a = str.split('').map do |c|
    if k = az.find_index(c)
      az[(k + diff) % 26]
    else
      ' '
    end
  end
  a.join('')
end

# number_to_human is the method in rails/active support , this does not work for three hundred thousand. will need to fix this
def to_bot(str)
  str.split(" ").map{ |n| $cardinals[n] }.inject(0){|r,i| i >=100 ? r/100*100 + (r%100 * i) : r/100*100 + (r%100 +i) }
end

def diff_char(a,b)
  az = $az
  (az.index(a) - az.index(b)) % 26
end

def try_find_the_word(s)
  az = $az
  s.split(/[ ,-]/).each do |w|
    $cardinals.keys.each do |ck|
      success = true
      next if ck.length != w.length
      constant = diff_char(ck[0], w[0])
      (ck.length - 1).times do |i|
        unless (az.index(ck[i+1]) - az.index(w[i+1])) % 26 == constant
          success = false
          break
        end
      end
      success == false ? next : (words << ck) and break
    end
  end
end

# list files
Dir.new(".").to_a.each do |file|
  next unless file =~ /q-[0-9]/ # local file names
  data = File.read(file)
  json = JSON.parse(data)
  q = json['game']['fact_question'].sub(/Who is the author of the book / , '' ).sub('?', '')
  c = json['game']['fact_cph_answer']
  s = json['game']['cph_number']
  id = json['game']['id']
  # figure out the thousand if not . figure out hundred
  a = s.split(/[ ,-]/).keep_if{|x| x.length == 8 && x[-3] != x[-2]} # fix for teen
  type = :thousand
  if a.size <= 0
    a = s.split(/[ ,-]/).keep_if{|x| x.length == 7 && x[-4] == x[-1] } # d = d in hundred
    type = :hundred
  end
  if a.size > 0
    d = case type
    when :thousand
      a[0].ord - 't'.ord
    when :hundred
      a[0].ord - 'h'.ord
    end

    begin
      str = chipher(s,-d)
      puts "#{id},#{to_bot(str)}"
    rescue
      # for bad input, You never know
      puts "Cant decipher - #{id} #{str} with cipher #{s}"
    end

    # detect number
  else
    # worse case scenario
    # detect based on the words and translate up everything
    words = try_find_the_word(s)
    if words.size > 0
      puts "#{id},#{to_bot(words.join(' '))}"
    else
      type = :ignore
      puts "Ignoring #{id} - #{file}"
    end
  end
end