牛的展览会 题目大意:Bessie要选一些牛参加展览,这些牛有两个属性,funness和smartness,现在要你求出怎么选,可以使所有牛的smartness和funness的最大,并且这两个和都不能为负值 这一题很有意思,首先是这个问题是二维的,它包含两个属性,但是他有一个很重要的条件就是牛只能选一次,所以我们一开始就很容易想到用背包貌似可以求解,但是这一题没有办法直接用背包,因为没有直接给出价值和容量(他给了两个价值). 但是,我们稍微变换一下,这一题就可以做了,我们要把一个看成是…

题目地址:https://vjudge.net/problem/POJ-2184 下面的解释是从一个大佬那搬来的,讲的很清楚题意:给定一些奶牛,每个牛有s和f两个属性值,有正有负,要求选出一些牛,使得这些牛的两种属性的和的加和最大,且这些牛的两种属性分别求加和不能为负.分析:dp,开始想到dp[i][s][f],表示前i头牛能否实现属性和分别为s, f.空间和时间都不允许,要将f从状态中拿出來,让f的属性和作为所求的值.即变为d[i][s] = f的形式.表示用前i头牛构成s属性和为s的情况下f…

题目链接:http://poj.org/problem?id=2184 Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9479   Accepted: 3653 Description "Fat and docile, big and dumb, they look so stupid, they aren't much  fun..."  - Cows with Guns by…

POJ-2184 [题意]: 有n头牛,每头牛有自己的聪明值和幽默值,选出几头牛使得选出牛的聪明值总和大于0.幽默值总和大于0,求聪明值和幽默值总和相加最大为多少. [分析]:变种的01背包,可以把幽默度看成体积,智商看成价值,那么就转换成求体积和价值都为正值的最大值的01背包了. 以 TS 作为体积,TF作为价值,在保证体积.价值非负的情况下,求解 sum,取其所有情况的最大值. 难点: 1)体积出现负数,将区间改变 [-100000, 100000] ---> [0, 200000]. (注…

Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10342   Accepted: 4048 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to…

Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10882   Accepted: 4309 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to…

POJ 2184 Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 14657   Accepted: 5950 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to…

Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12420   Accepted: 4964 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to…

Cow Exhibition Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10200   Accepted: 3977 Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want to prove to…

Cow Exhibition Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Description "Fat and docile, big and dumb, they look so stupid, they aren't much fun..." - Cows with Guns by Dana Lyons The cows want t…