This is a java program to check graph construction is possible or not using given degree sequence. If the sum of degree is even graph construction is possible, not otherwise.
Here is the source code of the Java Program to Check if any Graph is Possible to be Constructed for a Given Degree Sequence. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.
package com.sanfoundry.combinatorial; import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class CheckGraphConstuction { public static Integer sum(List<Integer> list) { Integer sum = 0; for (Integer integer : list) { sum += integer; } return sum; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter the number of vertices: "); Integer n = sc.nextInt(); System.out .println("Enter the Degree Sequence: <Degree sequence is always in non-increasing order>"); List<Integer> sequence = new ArrayList<Integer>(); while (n > 0) { sequence.add(sc.nextInt()); n--; } System.out.println(sequence.toString()); if (sum(sequence) % 2 == 0) { System.out .println("Graph can be constructed using the given sequence G=(" + sequence.size() + ", " + (sum(sequence) / 2) + ")."); } sc.close(); } }
Output:
$ javac CheckGraphConstuction.java $ java CheckGraphConstuction Enter the number of vertices: 7 Enter the Degree Sequence: <Degree sequence is always in non-increasing order> 5 3 3 2 2 1 0 [5, 3, 3, 2, 2, 1, 0] Graph can be constructed using the given sequence G=(7, 8). Enter the number of vertices: 3 Enter the Degree Sequence: <Degree sequence is always in non-increasing order> 3 3 1 [3, 3, 1] no soultion exists.
Related posts:
Quick Guide to Spring Controllers
Default Password Encoder in Spring Security 5
Java Program to Implement ArrayList API
JWT – Token-based Authentication trong Jersey 2.x
Introduction to Spring Cloud Rest Client with Netflix Ribbon
Java Program to Implement ConcurrentHashMap API
Java Program to Sort an Array of 10 Elements Using Heap Sort Algorithm
Java Switch Statement
Immutable Objects in Java
Java 8 Collectors toMap
Java – Write to File
Java Program to Implement Maximum Length Chain of Pairs
Java 9 Stream API Improvements
A Comparison Between Spring and Spring Boot
Returning Image/Media Data with Spring MVC
Java Program to find the number of occurrences of a given number using Binary Search approach
So sánh ArrayList và Vector trong Java
Từ khóa static và final trong java
Spring Boot - Runners
Copy a List to Another List in Java
Java Program to Perform Complex Number Multiplication
Sử dụng CyclicBarrier trong Java
Java Program to Implement Affine Cipher
Spring Boot - Web Socket
Removing all Nulls from a List in Java
Spring Security 5 – OAuth2 Login
LIKE Queries in Spring JPA Repositories
A Guide to Java HashMap
Java Program to Implement the Monoalphabetic Cypher
Introduction to Using FreeMarker in Spring MVC
Java Program to Search Number Using Divide and Conquer with the Aid of Fibonacci Numbers
REST Web service: Tạo ứng dụng Java RESTful Client với Jersey Client 2.x