Summer Holiday Time Limit: 10000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2256    Accepted Submission(s): 1050 Problem Description To see a World in a Grain of Sand And a Heaven in a Wild Flower, Hold Inf…

Summer Holiday Time Limit: 10000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2322    Accepted Submission(s): 1085 Problem Description To see a World in a Grain of Sand And a Heaven in a Wild Flower, Hold In…

Problem Description To see a World in a Grain of Sand  And a Heaven in a Wild Flower,  Hold Infinity in the palm of your hand  And Eternity in an hour.                    -- William Blake 听说lcy帮大家预定了新马泰7日游.Wiskey真是高兴的夜不能寐啊.他想着得快点把这消息告诉大家.尽管他手上有全部人的联系…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1827 Summer Holiday Time Limit: 10000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1721    Accepted Submission(s): 797 Problem Description To see a World in a…

HDU 1827 Summer Holiday 题目链接 题意:中文题 思路:强连通缩点,每一个点的权值为强连通中最小值,然后入度为0的点就是答案 代码: #include <cstdio> #include <cstring> #include <vector> #include <algorithm> #include <stack> using namespace std; const int N = 1005; const int INF…

2707: [SDOI2012]走迷宫 题意:求s走到t期望步数,\(n \le 10^4\),保证\(|SCC| \le 100\) 求scc缩点,每个scc高斯消元,scc之间直接DP 注意每次清空系数矩阵 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> using namespace std; typ…

一个有向图G=(V,E)称为半连通的(Semi-Connected),如果满足:?u,v∈V,满足u→v或v→u,即对于图中任意两点u,v,存在一条u到v的有向路径或者从v到u的有向路径.若G'=(V',E')满足V'?V,E'是E中所有跟V'有关的边,则称G'是G的一个导出子图.若G'是G的导出子图,且G'半连通,则称G'为G的半连通子图.若G'是G所有半连通子图中包含节点数最多的,则称G'是G的最大半连通子图.给定一个有向图G,请求出G的最大半连通子图拥有的节点数K,以及不同的最大半连通子图…

Intelligence System Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1859    Accepted Submission(s): 799 Problem Description After a day, ALPCs finally complete their ultimate intelligence syste…

Given a directed graph G, con- sider the following transformation. First, create a new graph T(G) to have the same vertex set as G. Cre- ate a directed edge between two vertices u and v in T(G) if and only if there is a path between u and v in G that…

Every cow's dream is to become the most popular cow in the herd. In a herd of N (1 <= N <= 10,000) cows, you are given up to M (1 <= M <= 50,000) ordered pairs of the form (A, B) that tell you that cow A thinks that cow B is popular. Since pop…