best program for graphs

2-3for one with Na graph of the vertices, if the adjacency matrix is represented, the size of the matrix is: (2 points) N? 1 N (N? 1)? 2?? N? 2?? Author : DS Course GroupUnit : Zhejiang University2-4If a forward graph is represented by an adjacency matrix, the first Ithe degree to which a node is entered is: (2 points) Section I number of elements in the row Section I number of non-0 elements in a row Section I number of non-0 elements of the column

......Sno_of_streets eno_of_streetsThe first line of all data set contains a positive integer no_of_intersections (greater than 0 and less or equal to 120), Which is the number of intersections in the town. The second line contains a positive integer no_of_streets, and which is the number of streets in the town. The next no_of_streets lines, one for each street in the town, is randomly ordered and represent the town ' s streets. The line corresponding to Street K (k There is no blank lines betwe

This article mainly introduces how to use matplotlib of Python to draw data graphs in Linux. matplotlib is an extension of Scientific Computing Based on Numpy, if you want to obtain an efficient, automated, and high-quality scientific drawing solution in Linxu, you should try the matplotlib library. Matplotlib is an open source scientific ing package based on python and is released based on the python Software Foundation license. A large number of doc

Storage structure of graphs (adjacency matrices)Let programming change the worldThe Storage structure of graphsThe storage structure of graphs is much more complex than linear tables and trees.We look back, for linear tables, is a one-to-one relationship, so with arrays or linked lists can be easily stored. The tree structure is a one-to-many relationship, so we want to combine the attributes of the a

Title Link: http://www.lydsy.com:808/JudgeOnline/problem.php?id=1143This is my first ctsc problem, the water I was shocked ... It is said that Bzoj only the first question, did not ask the second question, because no data, no wonder so water ...First we need to know the concept of a separate set of binary graphs :The independent set of a binary graph is a set of vertices that are not connected to any two points in a binary graph.maximum independent se

The nature of the dichotomy: in the graph G, there must be at least two points. If there is a loop, then the loop must be an even-edged loop. match : In graph theory, a match is a set of edges, where any two edges have no public vertices.maximum match: A match with the largest number of matched edges in all matches of a graph, called the maximum match of this graphMaximum matches: the number of matching edges that match the maximumPerfect Match : if one of the

Group coveragePerfect picture = companion Perfect picture. The chord chart is the perfect picture.9. The interval diagram is a chord chart.10. Given n intervals, it is required to select the most interval so that the intervals do not overlap each other. is actually the maximum point independent set of interval graphs.11. There are n bricks, height is 1, the width of the first building block is [Li, Ri], select a block of falling order to make the fin

, Figure 4, is the match of Figure 2.We define matching points , matching edges , unmatched points , mismatched edges , and they are very obvious. Example 3, 1, 4, 5, 7 is the matching point, the other vertices are unmatched points, 1-5, 4-7 is the matching edge, the other edges are non-matching edges.Maximum match : A match with the largest number of matched edges in all matches of a graph, called the maximum match for this graph. Figure 4 is a maximum match that contains 4 matching edges.Perfe

What is a graph | ω ･') Figure G is an Ordered Binary Group (V, E), where V is called the Vertices Set, E is called the Edges set, and E is not intersecting with V. They can also be written as V (G) and E (G ).The elements of E are binary groups, expressed by (x, y), where x, y, and V. (From Baidu encyclopedia) In short, a graph is composed of vertices and edges. It can also be understood as the abstract representation of the relationship between several elements, and the edge represents the re

from it. If not, then further backtracking. When all vertices are accessed, the entire depth-first traversal process is completed.Recursive algorithmThe Depthfirstsearch (v,visited)//visited is an array that represents the access of each vertex, and the initial value of the visited array is 0.DFSearch1. [Initialize]Print (v).Visited (v) =1.P=adjacent (Head[v]).//adjacent () is the head pointer of the Benking that holds the vertex, and the vertex table name is headDFSearch2. [Depth-first travers