gistfile1.rb

#!/usr/bin/env ruby

# http://www.facebook.com/careers/puzzles.php?puzzle_id=7
# Memory-heavy but low-computation solution

LOOP = [nil, nil, "Hoppity", nil, "Hophop", "Hoppity", nil, nil, "Hoppity", "Hophop", nil, "Hoppity", nil, nil, "Hop"]

File.open(ARGV[0], 'r') do |f|
  f.readline.to_i.times do |i|
    puts LOOP[i] unless LOOP[i].nil?
  end
end