poj2342 Anniversary party (树形dp) Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9128   Accepted: 5250 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarc…

Anniversary party poj-2342 题目大意:没有上司的舞会原题. 注释:n<=6000,-127<=val<=128. 想法:其实就是最大点独立集.我们介绍树形dp 树形dp就是以节点或者及其子树为信息,进行动态规划.用dfs的原理,遍历,在回溯是更新父亲节点. 然后,关于这道题,我们就可以对于每一个节点进行标记,然后对于满足条件的节点进行遍历.设状态就是两个dp,分别表示选当前根节点和不选当前根节点.更新是瞎jb更新即可... .... 最后,附上丑陋的代码...…

Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8028   Accepted: 4594 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure…

POJ 2342 Anniversary party (树形dp 入门题) Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4810   Accepted: 2724 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The U…

Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6635   Accepted: 3827 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure…

Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees. It means that the supervisor relation forms a tree rooted at the rector V. E. Tretyako…

转载请注明出处,谢谢:http://www.cnblogs.com/KirisameMarisa/p/4316097.html   ---by 墨染之樱花 [题目链接]http://poj.org/problem?id=2342 [题目描述]一个企业有N个员工,每个人都有一个表示欢乐度的数值.现在要开一场party,不过这些员工里面有上下级关系,每个员工都不希望见到自己的直接上司,即每个员工都不能和直接上司同时出现.求这场party到场的人的总欢乐度的最大值 [思路]最基础的树形dp,现根据上下…

题意:选出不含直接上下司关系的最大价值. 解题关键:树形dp入门题,注意怎么找出根节点,运用了并查集的思想. 转移方程:dp[i][1]+=dp[j][0];/i是j的子树 dp[i][0]+=max(dp[j][0],dp[j][1]); #include<cstdio> #include<cstring> #include<algorithm> #include<cstdlib> #include<iostream> #include<…

http://poj.org/problem?id=2342 (题目链接) 题意 没有上司的舞会... Solution 树形dp入门题. dp[i][1]表示第i个节点的子树当节点i去时的最大值,dp[i][0]表示第i个节点的子树当节点i不去时的最大值.转移很好转,dp[i][0]=max(dp[j][1],dp[j][0]) (j是i的儿子),dp[i][1]=dp[j][0] (j是i的儿子). 代码 // poj2342 #include<algorithm> #include<…

原题地址:http://poj.org/problem?id=2342 题目大意: 上司和下属不能同时参加派对,求参加派对的最大活跃值. 关系满足一棵树,每个人都有自己的活跃值(-128~127) 求最大的活跃度. 树形DP入门题. 首先讲解一下树形DP,顾名思义,树形DP一定是在树上的DP,与普通的DP相似,具有两个方向. 1.根---->叶 2.叶---->根 其中第二种最为常用.实现方法:从根节点开始DFS(深度优先搜索),一直搜索到叶节点,然后根据其特殊性质赋值.通过回溯更新到根节点.…

POJ 2342 Anniversary party / HDU 1520 Anniversary party / URAL 1039 Anniversary party(树型动态规划) Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of emp…

Windows.UI.Composition API是可以从任何通用Windows平台应用程序调用的声明性保留模式API,从而可以直接在应用程序中创建合成对象.动画和效果. Composition API在 10586SDK 中就已经出现,但是在年度更新之后,该SDK变得更加完善,也有了更多样性的功能.今天我们就来谈谈如何在基于 Anniversary SDK 的UWP应用中使用Composition API创建DropShadow效果. 1.首先,假如我们想要为一个Ellipse对象创造Dro…

Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7230   Accepted: 4162 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure…

比尔-盖茨在4月3日给微软全体员工写了这封邮件,原文是英文,我们翻译了中文.图片是后加上的. 明天将是特殊的一天:微软的40周年纪念日. Tomorrow is a special day: Microsoft’s 40th anniversary. 在很早的时候,保罗·艾伦(Paul Allen)和我制定了目标,即让每张办公桌和每个家庭都拥有一台计算机.这是一个大胆的设想,当时许多人认为,这样的目标不可能完成,而我们一定是疯了.现在想一想自那时以来计算技术的发展,这非常有趣.而对于微软在这场革…

树形DP....在树上做DP....不应该是猴子干的事吗?  Anniversary party Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3563    Accepted Submission(s): 1648 Problem Description There is going to be a party to celebrat…

A - Anniversary party Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1520 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The Universit…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6058    Accepted Submission(s): 2743 Problem Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State Univers…

Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 5523   Accepted: 3169 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure…

Anniversary party Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3862   Accepted: 2171 Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure…

B. Hidden String Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://bestcoder.hdu.edu.cn/contests/contest_chineseproblem.php?cid=610&pid=1002 Description 今天是BestCoder一周年纪念日. 比赛管理员Soda有一个长度为n的字符串s. 他想要知道能否找到s的三个互不相交的子串s[l1..r1], s[l2..r2], s[l3..r3]满足…

http://acm.split.hdu.edu.cn/showproblem.php?pid=1520 Anniversary party Problem Description   There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees. It me…

Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical structure of employees. It means that the supervisor relation forms a tree rooted at the rector V. E. Tretyako…

题目传送门 /* 二分图点染色:这题就是将点分成两个集合就可以了,点染色用dfs做, 剩下的点放到点少的集合里去 官方解答:首先二分图可以分成两类点X和Y, 完全二分图的边数就是|X|*|Y|.我们的目的是max{|X|*|Y|}, 并且|X|+|Y|=n. 修正:实现多连通块染色,然后贪心选择,将两个集合个数差大的连通块优先添加,能尽量使得un*vn最大 */ #include <cstdio> #include <algorithm> #include <cstring&…

题目传送门 /* 官方题解: 这个题看上去是一个贪心, 但是这个贪心显然是错的. 事实上这道题目很简单, 先判断1个是否可以, 然后判断2个是否可以. 之后找到最小的k(k>2), 使得(m-k)mod6=0即可. 证明如下: 3n(n-1)+1=6(n*(n-1)/2)+1, 注意到n*(n-1)/2是三角形数, 任意一个自然数最多只需要3个三角形数即可表示. 枚举需要k个, 那么显然m=6(k个三角形数的和)+k, 由于k≥3, 只要m?k是6的倍数就一定是有解的. 事实上, 打个表应该也能…

Anniversary party Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Problem Description There is going to be a party to celebrate the 80-th Anniversary of the Ural State University. The University has a hierarchical…

http://acm.hdu.edu.cn/showproblem.php?pid=5311 Hidden String Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1499    Accepted Submission(s): 534 Problem Description Today is the 1st anniversar…

C - Anniversary FireworkTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87643#problem/B Description Denis has to prepare the Ural State University 90th anniversary firework. He bought n rockets and s…

Anniversary party Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6078    Accepted Submission(s): 2752 Problem Description There is going to be a party to celebrate the 80-th Anniversary of the…

Time limit: 0.5 second Memory limit: 8 MB Background The president of the Ural State University is going to make an 80'th Anniversary party. The university has a hierarchical structure of employees; that is, the supervisor relation forms a tree roote…

Souvenir  Accepts: 1078  Submissions: 2366  Time Limit: 2000/1000 MS (Java/Others)  Memory Limit: 262144/262144 K (Java/Others) Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, wants to buy a souvenir for each…