摘要: 问题 I: Sandglass 题目描述 We have a sandglass consisting of two bulbs, bulb A and bulb B. These bulbs contain some amount of sand. When we put the sandglas 阅读全文
posted @ 2018-07-29 20:59 1371767389 阅读(362) 评论(0) 推荐(0) 编辑