npearce

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

pheuter

def uncipher(str)
  1.upto(26) do |shift|
    key = Hash[('a'..'z').zip((97..122).collect{ |i| if (i+shift > 122) then ((i + shift) % 122) + 96 else i+shift end })].merge({' '=>' '.ord,','=>','.ord,'.'=>'.'.ord,'?'=>'?'.ord,'!'=>'!'.ord})
    freqs = Hash.new(0)
    tmp = str.split('').collect { |letter| switched = (key[letter]).chr; freqs[switched] += 1; switched }
    total = 0
    freqs.each { |e| total += e[1] }
    puts tmp.join if freqs['e']/total.to_f * 100 > 7 and freqs['t']/total.to_f * 100 > 5 # Might want to eventually make more accomodating
  end
end

pheuter

import Data.List
main = print $ length . filter (\x -> sum x `elem` a) . filter (\x -> length x > 1) $ subsequences a
  where a = [3, 4, 9, 14, 15, 19, 28, 37, 47, 50, 54, 56, 59, 61, 70, 73, 78, 81, 92, 95, 97, 99]