摘要:
P2978 [USACO10JAN]下午茶时间Tea Time 题目描述 N (1 1 | \ | --> 1 | X | \ | \| |/ \| 4---5 4---5 ... 阅读全文
摘要:
P2907 [USACO08OPEN]农场周围的道路Roads Around The Farm 题目描述 Farmer John's cows have taken an interest in exploring the territory around the farm. Initi... 阅读全文