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834. Sum of Distances in Tree —— weekly contest 84
Sum of Distances in Tree An undirected, connected tree with N nodes labelled 0...N-1 and N-1 edges are given. The ith edge connects nodes edges[i][0]  ...
分类:其他好文   时间:2018-05-14 00:58:57    阅读次数:793
CodeForces 838B - Diverging Directions - [DFS序+线段树]
题目链接:http://codeforces.com/problemset/problem/838/B You are given a directed weighted graph with n nodes and 2n?-?2 edges. The nodes are labeled from  ...
分类:其他好文   时间:2018-05-07 22:52:04    阅读次数:172
TensorFlow核心概念和原理介绍
关于 TensorFlow TensorFlow 是一个采用数据流图(data flow graphs),用于数值计算的开源软件库。 节点(Nodes)在图中表示数学操作,图中的线(edges)则表示在节点间相互联系的多维数据数组,即张量(tensor)。它灵活的架构让你可以在多种平台上展开计算,例 ...
分类:其他好文   时间:2018-05-01 23:39:01    阅读次数:251
HDU 6026 Deleting Edges
题目:http://acm.hdu.edu.cn/showproblem.php?pid=6026 题意:给出一个图,要求删除一些边,然后使得删除后的图是一颗树,并且各个点到0点的距离为原来图中的最短距离。 解法:Dijstra算出每个点到原点的距离,然后枚举每个点,计算它的临点到他的距离为它本身的 ...
分类:其他好文   时间:2018-04-29 15:19:34    阅读次数:159
四川第七届 D Vertex Cover(二分图最小点覆盖,二分匹配模板)
Vertex Cover frog has a graph with nn vertices v(1),v(2),…,v(n)v(1),v(2),…,v(n) and mm edges (v(a1),v(b1)),(v(a2),v(b2)),…,(v(am),v(bm))(v(a1),v(b1)), ...
分类:其他好文   时间:2018-04-27 02:20:40    阅读次数:186
SPOJ QTREE2 (LCA - 倍增 在线)
You are given a tree (an undirected acyclic connected graph) with N nodes, and edges numbered 1, 2, 3...N-1. Each edge has an integer value assigned t ...
分类:其他好文   时间:2018-04-24 23:15:55    阅读次数:225
Halcon 2D测量
* This program shows how to detect the edges of a diamond * with subpixel accuracy and calculate the angle between them. * * In contrast to the exampl... ...
分类:其他好文   时间:2018-04-24 20:12:49    阅读次数:1336
连通分量!
As part of a CS course, Alice just ?nished programming her robot to explore a graph having n nodes, labeled 1, 2, . . . , n, and m directed edges. Ini ...
分类:其他好文   时间:2018-04-22 20:00:04    阅读次数:181
cleaning
Cleaning 时间限制: 2 Sec 内存限制: 256 MB 题目描述 There is a tree with N vertices, numbered 1 through N. The i th of the N?1 edges connects vertices ai and bi. C ...
分类:其他好文   时间:2018-04-21 13:34:22    阅读次数:178
codeforces 963B Destruction of a Tree
You are given a tree (a graph with n vertices and n?-?1 edges in which it's possible to reach any vertex from any other vertex using only its edges). ...
分类:其他好文   时间:2018-04-20 23:30:23    阅读次数:171
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