// forwards star
int num,adj[10005];

struct edge
{int v,pre;}e[10005];

void insert(int u,int v)
{
    e[num].v=v;
    e[num].pre=adj[u];
    adj[u]=num++;
}

for(i=adj[x];~i;i=e[i].pre)
{

}

Edited by author 02.08.2011 07:19