Teacher Gao has something to notify 24 students. If you use the phone, you will notify 1 person every minute. At least how many minutes can be used to notify everyone.
高老师有件事要通知24名同学，如果用打电话的方式，每分钟通知1人．最少用多少分钟就能通知到每个人．
<result>5</result>