Call the students in the percussion band to come to the rehearsal. It is known that there are 24 members in the percussion band, and it takes 1 minute to notify one person, what is the minimum number of minutes to use the optimal solution.
打电话通知打击乐队的同学来彩排．已知打击乐队共24人，通知一人用时1分钟，利用最佳方案最少用多少分钟．
<result>5</result>