penguoir

def each_way_to_remove_one_level(original_arr)
  original_arr.map.with_index do |_, index|
    original_arr.dup.tap { _1.delete_at(index) }
  end
end

def monotonic?(record)
  record.each_cons(2).map { |a, b| a <=> b }.uniq.count == 1
end