2015年8月4日
叉积求多变形面积
摘要： DescriptionMr. Tenant is going to buy a new house. In fact, he is going to buy a piece of land and build his new house on it. In order to decide which... 阅读全文
posted @ 2015-08-04 20:14 茶飘香~ 阅读(246) 评论(0) 推荐(0) 编辑
抽屉原理
摘要： Every year there is the same problem at Halloween: Each neighbour is only willing to give a certaintotal number of sweets on that day, no matter how m... 阅读全文
posted @ 2015-08-04 16:32 茶飘香~ 阅读(175) 评论(0) 推荐(0) 编辑