package Graph;
import java.util.*;
public class DirectedGraph {
private int edges;
private int vertices;
private ArrayList[] adj;
@SuppressWarnings("unchecked")
public DirectedGraph(int v) {
edges = 0;
vertices = v;
adj = (ArrayList[])new ArrayList[v];
for (int i = 0; i < v; i++) {
adj[i] = new ArrayList();
}
}
public void addEdge(int v, int w) {
adj[v].add(w);
edges++;
}
public Iterable adj(int v) {
return adj[v];
}
public int V() {
return vertices;
}
public int E() {
return edges;
}
}