92 lines
2.3 KiB
Java
92 lines
2.3 KiB
Java
package DataStructures.Graphs;
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import java.util.Scanner;
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import java.util.ArrayList;
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class Cycle {
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private int nodes, edges;
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private int[][] adjacencyMatrix;
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private boolean[] visited;
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ArrayList<ArrayList<Integer>> cycles = new ArrayList<ArrayList<Integer>>();
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public Cycle() {
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Scanner in = new Scanner(System.in);
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System.out.print("Enter the no. of nodes: ");
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nodes = in.nextInt();
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System.out.print("Enter the no. of Edges: ");
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edges = in.nextInt();
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adjacencyMatrix = new int[nodes][nodes];
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visited = new boolean[nodes];
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for (int i = 0; i < nodes; i++) {
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visited[i] = false;
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}
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System.out.println("Enter the details of each edges <Start Node> <End Node>");
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for (int i = 0; i < edges; i++) {
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int start, end;
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start = in.nextInt();
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end = in.nextInt();
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adjacencyMatrix[start][end] = 1;
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}
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in.close();
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}
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public void start() {
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for (int i = 0; i < nodes; i++) {
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ArrayList<Integer> temp = new ArrayList<>();
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dfs(i, i, temp);
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for (int j = 0; j < nodes; j++) {
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adjacencyMatrix[i][j] = 0;
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adjacencyMatrix[j][i] = 0;
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}
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}
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}
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private void dfs(Integer start, Integer curr, ArrayList<Integer> temp) {
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temp.add(curr);
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visited[curr] = true;
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for (int i = 0; i < nodes; i++) {
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if (adjacencyMatrix[curr][i] == 1) {
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if (i == start) {
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cycles.add(new ArrayList<Integer>(temp));
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} else {
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if (!visited[i]) {
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dfs(start, i, temp);
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}
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}
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}
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}
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if (temp.size() > 0) {
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temp.remove(temp.size() - 1);
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}
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visited[curr] = false;
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}
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public void printAll() {
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for (int i = 0; i < cycles.size(); i++) {
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for (int j = 0; j < cycles.get(i).size(); j++) {
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System.out.print(cycles.get(i).get(j) + " -> ");
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}
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System.out.println(cycles.get(i).get(0));
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System.out.println();
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}
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}
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}
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public class Cycles {
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public static void main(String[] args) {
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Cycle c = new Cycle();
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c.start();
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c.printAll();
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}
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} |