2016年3月29日
Red and Black
摘要： Problem DescriptionThere is arectangular room, covered with square tiles. Each tile is coloredeither red or black. A man is standing on a black til... 阅读全文
posted @ 2016-03-29 22:40 勿忘初心0924 阅读(180) 评论(0) 推荐(0) 编辑