A number of students attend physical education class. If there is one less student in 3 rows, more than 3 students in 4 rows, one less student in 5 rows, and 5 more students in 6 rows, then the minimum number of students in physical education class is the number of students.
若干同学上体育课，排成3行少1人，排成4行多3人，排成5行少1人，排成6行多5人，则上体育课的同学最少有多少人．
<gadget id="calculator">60 - 1</gadget>
<output>59</output>

<result>59</result>