2018年9月3日
[思维]Folding a Ribbon
摘要： 题目描述 Think of repetitively folding a very long and thin ribbon. First, the ribbon is spread out from left to right, then it is creased at its center, 阅读全文
posted @ 2018-09-03 20:20 听风不成泣 阅读(247) 评论(0) 推荐(0) 编辑