题目描述 Farmer John has grown so lazy that he no longer wants to continue maintaining the cow paths that currently provide a way to visit each of his N (5 <= N <= 10,000) pastures (conveniently numbered 1..N). Each and every pasture is home to one cow.…

https://www.luogu.org/problem/show?pid=2916 题目描述 Farmer John has grown so lazy that he no longer wants to continue maintaining the cow paths that currently provide a way to visit each of his N (5 <= N <= 10,000) pastures (conveniently numbered 1..N)…

题目描述 Farmer John has grown so lazy that he no longer wants to continue maintaining the cow paths that currently provide a way to visit each of his N (5 <= N <= 10,000) pastures (conveniently numbered 1..N). Each and every pasture is home to one cow.…

P2916 [USACO08NOV]为母牛欢呼Cheering up the C… 题目描述 Farmer John has grown so lazy that he no longer wants to continue maintaining the cow paths that currently provide a way to visit each of his N (5 <= N <= 10,000) pastures (conveniently numbered 1..N).…

P2915 [USACO08NOV]奶牛混合起来Mixed Up Cows 题意: 给定一个长\(N\)的序列,求满足任意两个相邻元素之间的绝对值之差不超过\(K\)的这个序列的排列有多少个? 范围: \(0<=n<=16,0<=序列元素<=25000,0<=k<=3400\) 统计次数一般是递推干的事情,但是我们发现,这个递推并没有一个很明显的顺序关系,并不可以说前几个转移到下一个之类的. 看看数据这么小,一般都是状压干的事情了. 我们可以按照规模进行递推,即一个大小…

P2915 [USACO08NOV]奶牛混合起来Mixed Up Cows 题目描述 Each of Farmer John's N (4 <= N <= 16) cows has a unique serial number S_i (1 <= S_i <= 25,000). The cows are so proud of it that each one now wears her number in a gangsta manner engraved in large le…

P2919 [USACO08NOV]守护农场Guarding the Farm 题目描述 The farm has many hills upon which Farmer John would like to place guards to ensure the safety of his valuable milk-cows. He wonders how many guards he will need if he wishes to put one on top of each hill…

P2846 [USACO08NOV]光开关Light Switching 题目大意: 灯是由高科技——外星人鼠标操控的.你只要左击两个灯所连的鼠标, 这两个灯,以及之间的灯都会由暗变亮,或由亮变暗.右击两个灯所连的鼠 标,你就可以知道这两个灯,以及之间的灯有多少灯是亮的.起初所有灯都是暗的,你的任务是在LZ之前算出灯的亮灭. 线段树的懒标记下传 #include<bits/stdc++.h> #define N 1000005 #define LL long long #define RE r…

P2915 [USACO08NOV]奶牛混合起来Mixed Up Cows 题目描述 Each of Farmer John's N (4 <= N <= 16) cows has a unique serial number S_i (1 <= S_i <= 25,000). The cows are so proud of it that each one now wears her number in a gangsta manner engraved in large le…

P2918 [USACO08NOV]买干草Buying Hay 题目描述 Farmer John is running out of supplies and needs to purchase H (1 <= H <= 50,000) pounds of hay for his cows. He knows N (1 <= N <= 100) hay suppliers conveniently numbered 1..N. Supplier i sells packages t…