摘要: 【BZOJ1645】[Usaco2007 Open]City Horizon 城市地平线 Description Farmer John has taken his cows on a trip to the city! As the sun sets, the cows gaze at the c 阅读全文
posted @ 2017-01-13 10:23 CQzhangyu 阅读(618) 评论(0) 推荐(2) 编辑