try_offece.rb

class OfficeTable
  def initialize
    @table = Array.new(8, 0)
  end

  def attend(customer_count)
    if @table.all?{ |e| e == 0}
      for i in 0..(customer_count-1) do
        @table[i] = 3
      end
      return true
    end

    for i in 0..7 do
      j = 0
      while @table[(i + j) % 8] == 0
        j += 1
      end
      # p "#{j}, #{customer_count}"
      if customer_count <= j
        for k in i..(i + customer_count-1) do
          @table[k%8] = 3
        end
        return true
      end
    end
    return false
  end

  def next_turn!
    for i in 0..7 do
      table[i] = table[i] - 1 if table[i] > 0
    end
  end

  def table
    @table
  end

  def result
    @table.map { |e| e == 0 ? 0 : 1 }.join
  end
end



def test(problem, expect)

  table = OfficeTable.new

  input = problem.split('')

  until input.empty?
    customer_count = input.shift
    table.next_turn!
    until table.attend(customer_count.to_i)
      table.next_turn!
    end
  end

  if table.result == expect
    p "pass"
  else
    p "failed"
  end
end