196 students are arranged in a row according to numbers from 1 to 196. Let the students with odd numbers (1, 3, 5...) leave the team, and the order of the rest of the students remains the same, re-number from 1 to the largest, and then let the students with odd numbers in the new number leave the team, repeat the above method in turn, and finally Leave a classmate. What is the starting number of this student?
196名学生按编号从1到196顺次排成一列．令奇数号位(1，3，5…)上的同学离队，余下的同学顺序不变，重新自1从小到大编号，再令新编号中奇数上的同学离队，依次重复上面的做法，最后留下一位同学．这位同学开始的编号是多少号．
<gadget id="calculator">2 ** 7</gadget>
<output>128</output>

<result>128</result>