摘要：
# [[USACO09MAR]Cow Frisbee Team S](https://www.luogu.com.cn/problem/P2946 "[USACO09MAR]Cow Frisbee Team S") ## 题目描述 老唐最近迷上了飞盘，约翰想和他一起玩，于是打算从他家的 $N$ 头奶 阅读全文
摘要：
# [[USACO08NOV]Buying Hay S](https://www.luogu.com.cn/problem/P2918 "[USACO08NOV]Buying Hay S") ## 题目描述 Farmer John is running out of supplies and nee 阅读全文