public class GraphDemo {
    public static void main(String[] args) {
	Graph g = new DenseGraph(5);
	g.addEdge(0, 1);
	g.addEdge(1, 2);
	g.addEdge(0, 2);
	g.addEdge(0, 3);
	g.addEdge(0, 4);
	
	System.out.println(g.hasEdge(1, 0));
	System.out.println(g.neighboursOf(1));
	System.out.println(g.neighboursOf(0));
	
	System.out.println(g.depthFirstTraversal(1));
    }
}