There are 49 people in the mathematics interest group in the sixth grade, which is 1 person less than twice the number of the writing group. How many people are there in the writing group?
六年级参加数学兴趣小组有49人，比写作组人数的2倍少1人，写作小组有多少人？
<gadget id="calculator">49 + 1</gadget>
<output>50</output>

<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<result>25</result>