每天下课老师都会给某个学生进行课外辅导。由于时间有限，所以老师只能辅导一名知识掌握程度最低的同学。如果有多名同学知识掌握程度最低，则选编号最小的同学进行辅导。该同学在接受辅导后提升了知识掌握程度。老师想知道他每天辅导的同学的编号。

-Daily class teacher to a student after school tutoring. Due to limited time, so the teacher can only counseling a knowledge to grasp the lowest level of the students. If there is more than the students knowledge of the lowest level, then select the minimum number of students to provide counseling. Enhance the degree of knowledge of the students receive counseling. The teachers want to know the number of his daily counseling students.