gistfile1.rb

SINGLE_ROLL_MULTIPLIERS = [0, 100, 0, 0, 0, 50, 0]

def score(dice)
  score = 0
  (1..6).each do |number|
    roll_count = dice.count { |dice| dice == number }

    if roll_count >= 3
      score += number == 1 ? 1000 : 100 * number
      roll_count -= 3
    end

    score += roll_count * SINGLE_ROLL_MULTIPLIERS[number]
  end
  score
end