It was snowing heavily one winter, and the "student" teacher made an emergency phone call to the students to inform the suspension of the class. Assuming that one call can be completed in one minute, and asked the students to convey to each other as soon as possible (the teacher was also calling at the same time, and there was no repeated notification), the problem: in 6 How many people can be notified within minutes at most.
某冬天下大雪，"好学"的老师给学生打紧急电话通知停课，假设1分钟可以完成1次通话，并要求学生尽快相互转达(老师同时也在打，且无重复通知)，问题：在6分钟内最多能通知多少人．
<gadget id="calculator">2 * 2 * 2 * 2 * 2 * 2</gadget>
<output>64</output>

<gadget id="calculator">64 - 1</gadget>
<output>63</output>

<result>63</result>