摘要: Description Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing 阅读全文
posted @ 2017-06-30 22:45 PIPIBoss 阅读(158) 评论(0) 推荐(1) 编辑