require 'date'

def suuziwa(str)
  if (str.length == 1)
    return str.to_i
  end
  if (str.length == 2)
    return str[0].to_i + str[1].to_i
  end
end

head = Date.new(2015, 1, 31)
tail = Date.new(2015, 12, 31)
i = 0
(head..tail).each { |date|
  m = date.strftime('%m')
  d = date.strftime('%d')
  if (m.to_i == suuziwa(d))
    i = i + 1
  end
}
puts i.to_s + "\r\n"