2015年10月15日
1650: [Usaco2006 Dec]River Hopscotch 跳石子
摘要： DescriptionEvery year the cows hold an event featuring a peculiar version of hopscotch that involves carefully jumping from rock to rock in a river. T... 阅读全文
posted @ 2015-10-15 08:33 HTWX 阅读(145) 评论(0) 推荐(0) 编辑