2012年6月18日
摘要: Description﹡﹡﹡﹡Marsha and Bill own a collection of marbles. They want to split the collection among themselves so that both receive an equal share of the marbles. This would be easy if all the marbles had the same value, because then they could just split the collection in half. But unfortunately, s 阅读全文
posted @ 2012-06-18 23:14 怡红公子 阅读(211) 评论(0) 推荐(0) 编辑