题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6343 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others) Problem DescriptionThere is a complete graph containing n vertices, the weight of the i-th vertex is wi.The length…

6343.Problem L. Graph Theory Homework 官方题解: 一篇写的很好的博客: HDU 6343 - Problem L. Graph Theory Homework - [(伪装成图论题的)简单数学题] 代码: //1012-6343-数学 #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<bitset&g…

传送门:http://acm.hdu.edu.cn/showproblem.php?pid=6343 Problem L. Graph Theory Homework Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1536    Accepted Submission(s): 830 Problem Description Ther…

6330.Problem L. Visual Cube 这个题就是输出立方体.当时写完怎么都不过,后来输出b<c的情况,发现这里写挫了,判断失误.加了点东西就过了,mdzz... 代码: //1012-模拟乱写输出立方体 #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<cmath> #include<cstdlib&g…

<题目链接> 题目大意: 一天有N个小时,有m个节目(每种节目都有类型),有k个人,连续看相同类型的节目会扣w快乐值.每一种节目有都一个播放区间[l,r].每个人同一时间只能看一个节目,看完可以获得快乐值,每个节目只能被人看一次.问最多可以获得多少快乐? 解题分析: 本题用费用流求解的方式还是比较直观的.因为本题要求的是最大费用,所以我们需要建图的时候需要将所有实际费用取反,然后将最后最小费用最大流求出的答案取反,就是要求的最大费用.具体建图过程见代码: #include <bits/s…

题意:M个影片,其属性有开始时间S,结束时间T,类型op和权值val.有K个人,每个人可以看若干个时间不相交的影片,其获得的收益是这个影片的权值val,但如果观看的影片相邻为相同的属性,那么收益要减少W.每个影片只能被一个人看.求所有人能获得的收益值之和的最大值. 分析:因为人数不定,所以贪心和dp的思路被否定了.1对多的带权匹配,求最大权,这种问题显然KM是解决不了的,那么只能是最小费用最大流了.而这题要求的是最大收益,那么建负权边即可. 为了保证每个影片只被一个人观看,将其拆为入点和出点,入…

题意: 给定n个点,每个点有权值a[i],从A走到B的花费是下取整sqrt(a[i]-a[j]),求从1号点走到n号点的最小花费 1<=n,a[i]<=1e5 思路: #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<iostream> #include<algorithm> #include<map> #i…

Source: Connected Brain Figure above: Bullmore E, Sporns O. Complex brain networks: graph theoretical analysis of structural and functional systems.[J]. Nature Reviews Neuroscience, 2009, 10(3):186-198. Graph measures A graph G consisting of a set of…

http://acm.hdu.edu.cn/showproblem.php?pid=5876 Sparse Graph Problem Description   In graph theory, the complement of a graph G is a graph H on the same vertices such that two distinct vertices of H are adjacent if and only if they are not adjacent in…

Problem E. TeaTree Problem Description Recently, TeaTree acquire new knoledge gcd (Greatest Common Divisor), now she want to test you.As we know, TeaTree is a tree and her root is node 1, she have n nodes and n-1 edge, for each node i, it has it’s va…