Strategic game Time Limit: 2000MS   Memory Limit: 10000K Total Submissions: 5498   Accepted: 2484 Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad…

Strategic game Time Limit: 2000MS   Memory Limit: 10000K Total Submissions: 9582   Accepted: 4516 Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad…

题目链接:http://poj.org/problem?id=1463 给你一棵树形图,问最少多少个点覆盖所有的边. 可以用树形dp做,任选一点,自底向上回溯更新. dp[i][0] 表示不选i点 覆盖子树所有边的最少点个数,那选i点的话,那么i的邻接节点都是必选的,所以dp[i][0] += dp[i.son][1] dp[i][1] 表示选i点 覆盖子树所有边的最少点个数,那么i的邻接点可选可不选(而不是一定不选,看注释样例就知道了),所以dp[i][0] += min(dp[i.son][…

求一棵树每条边都被选上的点覆盖掉的最少选点数. 一条边被覆盖掉,必须他父亲和儿子中选一个..这不就是比NOIP2018D2T3还裸的暴力么.水掉. lyd给的练习题都什么**玩意儿.. code不挂了.其实是我没写…

题目链接: 传送门 题目大意: Bob非常享受玩电脑游戏的过程,尤其是策略游戏,但是在有些时候,他因为不能在第一时间找到最佳的策略而十分伤心. 现在,他遇到了一个问题.他必须保卫一个中世纪的城市,有很多道路将整个城市连起来,整体上看上去像一棵树.Bob需要放置尽可能少的士兵,保卫树上所有的边.士兵只能放在节点上,但是却可以保卫所有与这个节点相邻的边. 题目分析: 由于树本身具有二分图的性质,所以这里我把树手动染色转成二分图,然后跑最小点覆盖 (当然也可以树形dp) 代码: #include <i…

关于树形DP几道入门题目 今天恶补树形DP,感觉海星. 其实挺简单的. 介绍几道例题,我会的. 1.洛谷P1352 没有上司的舞会 我的一篇题解 我们可以考虑每一个节点都是有两种情况. 一个是被邀请:另一个是不会被邀请. 前者后果就是子节点不可以被选择: 后者结果就是子节点可以被选择. 于是关系明确,状态转移方程为: dp[root][0] += std::max(dp[son[root][i]][0],dp[son[root][i]][1]); dp[root][1] += dp[son[ro…

Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now he has the following problem. He must defend a medieval city, the roads of which form a tree…

已经写过本题用二分图的做法,见这儿. 本题的图是一棵树,求最小点覆盖也可以用树形DP的做法. 定义状态f[0/1][u]表示以u为根的子树,u选取/不选最少需要选取多少点来覆盖. 显然 f[0][u] = Sigma{f[1][v]},f[1][u] = Sigma{min(f[0][v],f[1][v])}+1 ( < u,v > 属于G且v!=u.father) #include<iostream> #include<cstdio> #include<cstr…

原题链接 此题求二分图的最小点覆盖,数值上等于该二分图的最大匹配.得知此结论可以将图染色,建有向图,然后跑匈牙利/网络流,如下.然而... #include<iostream> #include<cstdio> #include<cstring> using namespace std; const int MAXN=2000+5; int q[MAXN],hd1[MAXN],hd2[MAXN]; int lnk[MAXN]; bool vis[MAXN],bw[MAX…

Strategic Game Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now he has the following problem. He must defend a medieval city, the roads of which form a t…

Introduction Many approaches to object oriented modeling tend not to scale well when the applications grow in size and complexity. Context Mapping is a general purpose technique, part of the Domain Driven Design (DDD) toolkit, helps the architects an…

题目地址:http://poj.org/problem?id=1463 题目: Strategic game Time Limit: 2000MS   Memory Limit: 10000K Total Submissions: 7929   Accepted: 3692 Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solu…

Strategic game Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice UVA 1292 Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5034    Accepted Submission(s): 2297 Problem Description Bob enjoys playing computer games, especially strategic games, but somet…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6586    Accepted Submission(s): 3066 Problem Description Bob enjoys playing computer games, especially strategic games, but some…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5783    Accepted Submission(s): 2677 Problem Description Bob enjoys playing computer games, especially strategic games, but somet…

http://www.modernanalyst.com/Resources/Articles/tabid/115/ID/2934/categoryId/23/Making-the-Elephant-Dance-Strategic-Enterprise-Analysis.aspx Many years ago, I attended a meeting held by a new CEO of an oil company. I was a stockholder and anticipated…

题目: Strategic Game Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 110 Accepted Submission(s): 75   Problem Description Bob enjoys playing computer games, especially strategic games, but sometim…

Strategic game Time Limit: 2000MS   Memory Limit: 10000K Total Submissions: 7490   Accepted: 3483 Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6421    Accepted Submission(s): 2987 Problem Description Bob enjoys playing computer games, especially strategic games, but somet…

Problem Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now he has the following problem. He must defend a medieval city, the roads of which for…

Strategic Game                                                         Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)                                                         Total Submission(s): 3772    Accepted…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2925    Accepted Submission(s): 1222 Problem Description Bob enjoys playing computer games, especially strategic games, but somet…

Strategic Game Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 141 Accepted Submission(s): 96   Problem Description Bob enjoys playing computer games, especially strategic games, but sometimes h…

Strategic Game Problem Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now he has the following problem. He must defend a medieval city, the roa…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 4061    Accepted Submission(s): 1791 Problem Description Bob enjoys playing computer games, especially strategic games, but some…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4697    Accepted Submission(s): 2125 Problem Description Bob enjoys playing computer games, especially strategic games, but somet…

Description Bob enjoys playing computer games, especially strategic games, but sometimes he cannot find the solution fast enough and then he is very sad. Now he has the following problem. He must defend a medieval city, the roads of which form a tree…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10153    Accepted Submission(s): 4744 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1054 Description: Bob enjoys playing compute…

Strategic Game Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 3806    Accepted Submission(s): 1672 Problem Description Bob enjoys playing computer games, especially strategic games, but some…