线段树 每个节点保存4个值,both表示左右端点都取,neither表示左右端点都不取,left表示只取左端点,right表示只取右端点. 维护的特殊姿势: $cur$的$both=max(ls.l+rs.r,ls.both+rs.r,ls.l+rs.both)$ $cur$的$neither=max(ls.nei+rs.nei,ls.r+rs.nei,ls.nei+rs.l)$ $cur$的$left=max(ls.l+rs.l,ls.l+rs.nei,ls.both+ls.nei)$ $cu…

4094: [Usaco2013 Dec]Optimal Milking Description Farmer John最近购买了N(1 <= N <= 40000)台挤奶机,编号为1 ... N,并排成一行.第i台挤奶机每天能够挤M(i)单位的牛奶 (1 < =M(i) <=100,000). 由于机器间距离太近,使得两台相邻的机器不能在同一天使用.Farmer John可以自由选择不同的机器集合在不同的日子进行挤奶. 在D(1 < = D < = 50,000)天中…

USACO 2013 DEC SILVER 一.题目概览 中文题目名称 挤奶调度 农场航线 贝西洗牌 英文题目名称 msched vacation shuffle 可执行文件名 msched vacation shuffle 输入文件名 msched.in vacation.in shuffle.in 输出文件名 msched.out vacation.out shuffle.out 每个测试点时限 1秒 1秒 1秒 测试点数目 10 10 10 每个测试点分值 10 10 10 比较方式 全文…

[BZOJ4094][Usaco2013 Dec]Optimal Milking Description Farmer John最近购买了N(1 <= N <= 40000)台挤奶机,编号为1 ... N,并排成一行.第i台挤奶机每天能够挤M(i )单位的牛奶 (1 < =M(i) <=100,000).由于机器间距离太近,使得两台相邻的机器不能在同一天使用.Farmer Jo hn可以自由选择不同的机器集合在不同的日子进行挤奶.在D(1 < = D < = 50,00…

[题意概述] 有n件物品,每件物品有体积Vi,背包容量为C,问最多可以装多少体积的物品 [题解] 显然是个无限背包嘛.. 直接做背包DP就好 注意无限背包的写法和01背包的区别 #include<cstdio> #include<algorithm> using namespace std; ; ; void read(int &k){ k=; ; char c=getchar(); ),c=getchar(); +c-',c=getchar(); k*=f; } int…

Optimal Milking Time Limit: 2000MS Memory Limit: 30000K Total Submissions: 13968 Accepted: 5044 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out into the cow pastures among the C (1 <= C <= 200) cows.…

POJ  2112 Optimal Milking (二分+最短路径+网络流) Optimal Milking Time Limit: 2000MS   Memory Limit: 30000K Total Submissions: 10176   Accepted: 3698 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out into the cow pastu…

Optimal Milking Time Limit: 2000MS   Memory Limit: 30000K Total Submissions: 17811   Accepted: 6368 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out into the cow pastures among the C (1 <= C <= 200) co…

  Optimal Milking Time Limit: 2000MS   Memory Limit: 30000K Total Submissions: 19347   Accepted: 6907 Case Time Limit: 1000MS issions: 19347   Accepted: 6907 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out…

题目链接:https://vjudge.net/problem/POJ-2112 Optimal Milking Time Limit: 2000MS   Memory Limit: 30000K Total Submissions: 18555   Accepted: 6626 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out into the cow past…