田野

《至理贤文》源于散文之着微醉

匿名 (未验证) 提交于 2019-12-02 23:49:02
晨起,微风吹拂,迎着第一缕朝阳绽放的方向,踩着清凉的露珠,沐着微醉的晨风,静静漫行在清爽舒适的 田野 上,欣喜盈怀。 云,很轻,风,很静,万物生灵大多还沉浸在黎明前的宁静里酣睡,只有几只晨起的粉蝶在花中轻舞。寂静的清晨,给人一种恬淡安然、温润祥和的柔美韵致,令人陶醉其中,流恋忘返。 沿着那条潺潺流动的 СϪ 蜿蜒而下,聆听溪水欢快地吟唱,心变得无比的愉悦。慢行几步,稍加留意,就能看到小鱼们在浅水里欢乐地舞蹈,顽皮的小虾们在溪边的水草丛里追逐嬉戏。若是你够幸运的话,兴许还能撞上小乌龟在堤脚下的缝隙间探出半个头来,欣喜地打量着这个神奇的世界呢。 然而,这静好的一切,随着一群大白鹅和一群小花鸭的介入而结束,在鹅与鸭的叫声响起的一刹那,小鱼小虾们早已屏声静气地藏匿好了身影,那胆小怕事的小乌龟更是吓得立马缩回那才稍稍探出小半截的头颅。瞬间,整条小溪便盈满了鹅与鸭的嘹亮歌声。 酷夏时节,燥热难当。寻一处静幽,临溪而坐,静赏波光潋滟,翩舞芭蕾,独具韵味;漫观杨柳拂堤,轻盈飘逸,心随柳飞;聆听溪水欢歌,低吟浅唱,心旷神怡。光的绚丽,柳的柔美,水的清凉足以驱走烦燥的心绪,在心间悄然氤氲出一抹柔和恬然的静美情愫,就连枝头那恼人的蝉鸣也变得悦耳动听了起来。也难怪,置身于如此静美宁然的天地,所见所闻皆为美,所思所想自然乐。 内心深处一直留存着一个梦想,期盼着有朝一日能在辽阔无边的大草原上 尽情 奔走

#(树形DP+容斥原理)洛谷P3047 [USACO12FEB]附近的牛Nearby Cows

前提是你 提交于 2019-11-28 08:55:25
题目描述 Farmer John has noticed that his cows often move between nearby fields. Taking this into account, he wants to plant enough grass in each of his fields not only for the cows situated initially in that field, but also for cows visiting from nearby fields. Specifically, FJ's farm consists of N fields (1 <= N <= 100,000), where some pairs of fields are connected with bi-directional trails (N-1 of them in total). FJ has designed the farm so that between any two fields i and j, there is a unique path made up of trails connecting between i and j. Field i is home to C(i) cows, although cows