2020年4月6日
【反转开灯问题】Face The Right Way
摘要： 题目 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 backward, 阅读全文
posted @ 2020-04-06 17:00 Vocanda 阅读(175) 评论(0) 推荐(0) 编辑