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Bzoj1688 [usaco2005 open]diseasemanangement 疾病管理
标签:状压DP Description Alas! A set of D (1 <= D <= 15)diseases (numbered 1..D) is runn...
Posted by yjjr's blog on February 6, 2018
Bzoj1669 [usaco2006 oct]hungry cows饥饿的奶牛
标签:LIS,DP Description Farmer John养了N(1<= N <= 5,000)头奶牛,每头牛都有一个不超过32位二进制数的正整数编号。F...
Posted by yjjr's blog on February 6, 2018
Bzoj1616 [usaco2008 mar]cow travelling游荡的奶牛
标签:DP Description 奶牛们在被划分成N行M列(2 <= N <= 100; 2 <= M <= 100)的草地上游走,试图找到整块草地...
Posted by yjjr's blog on February 6, 2018
Bzoj1606 [usaco2008 dec]hay for sale 购买干草
标签:背包DP Description 约翰遭受了重大的损失:蟑螂吃掉了他所有的干草,留下一群饥饿的牛.他乘着容量为C(1≤C≤5...
Posted by yjjr's blog on February 6, 2018
Bzoj1602 [usaco2008 oct]牧场行走
标签:树,LCA Description N头牛(2<=n<=1000)别人被标记为1到n,在同样被标记1到n的n块土地上吃草,第i头牛在第i块牧场吃草。 这n块土地...
Posted by yjjr's blog on February 6, 2018
Bzoj1601 灌水(usaco08 oct)
标签:最小生成树,并查集 Farmer John已经决定把水灌到他的n(1<=n<=300)块农田,农田被数字1到n标记。把一块土地进行灌水有两种方法,从其他农田饮水,或者...
Posted by yjjr's blog on February 6, 2018
Bzoj1597 [usaco2008 mar]土地购买
标签:斜率优化 Description 农夫John准备扩大他的农场,他正在考虑N (1 <= N <= 50,000) 块长方形的土地. 每块土地的长宽满足(1 &...
Posted by yjjr's blog on February 6, 2018
Bzoj1596 [usaco2008 jan]电话网络
标签:贪心,树形DP Description Farmer John决定为他的所有奶牛都配备手机,以此鼓励她们互相交流。不过,为此FJ必须在奶牛们居住的N(1 <= N &...
Posted by yjjr's blog on February 6, 2018
Bzoj1485 [hnoi2009]有趣的数列
标签:数学,数论,卡特兰数,组合数,素数筛 Description 我们称一个长度为2n的数列是有趣的,当且仅当该数列满足以下三个条件:  ...
Posted by yjjr's blog on February 6, 2018
Bzoj1477 青蛙的约会
标签:数学,数论,扩展欧几里得 Description 两只青蛙在网上相识了,它们聊得很开心,于是觉得很有必要见一面。它们很高兴地发现它们住在同一条纬度线上,于是它们约定各自朝西...
Posted by yjjr's blog on February 6, 2018
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