Before the summer camp starts, the teacher has an urgent notice to notify 30 team members as soon as possible. It takes one minute to notify one person, how many minutes at least?
暑假夏令营开营前，老师有一个紧急通知要尽快通知到30名队员，通知一个人需要一分钟，最少用几分钟？
<result>5</result>