OJ Board

import java.util.*;
@SuppressWarnings("serial")
class Linkedlist extends LinkedList<Integer>
{
}
class AdjMatrix{
private int V;
private Linkedlist adj[];
AdjMatrix(int v)
{
V=v;
adj=new Linkedlist[V];
for(int i=0;i<V;i++)
adj[i]=new Linkedlist();
}
void addEdge(int x,int y)
{
adj[x ...