There are 14 people in a painting group. The group leader calls the other members of the painting group immediately after receiving the call from the art teacher. It is known that it takes 1 minute to make a call. How many minutes will it take to notify everyone.
一个绘画小组有14人，组长接到美术老师的电话后立即打电话通知绘画组的其他成员，已知每打一个电话需要1分钟．最少要花多少分钟就能通知到每个人．
<result>4</result>