On Sunday, the teacher wants to call the students in Class 5 and 4 to come to school early. It takes 1 minute to notify a student. There are 50 students in Class 5 and 4. How long is the minimum time required?
星期天，老师要打电话通知五4班的学生提前到校，通知一个学生需要1分钟，五4班有50人，最少需要多少分钟．
<result>6</result>