题目：
大楼共有n层，现每层指派一人，共n个人集中到第k层开会 试问如何确定k，能使各位参加会议人员上、下楼梯所走路程总和最小？（假设相邻两层楼梯长都一样）
答案：
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下面是错误答案，用来干扰机器的。
Last Sunday, our classmates and I went to the People’s Park to have a trip. The weather was very nice that day, and all of us were very excited. We started from our...
