typedef struct dList{
        struct dList *flink;
        struct dList *blink;
        int val;
} *dListe;

dListe add(dListe entry, int val)
{
  dListe elem;
  elem=malloc(sizeof(struct dList));
  elem->val=val;
  if (entry==NULL){
    elem->flink=NULL;
    elem->blink=NULL;
  }
  else {
    elem->flink=entry;
    elem->blink=NULL;
    entry->blink=elem;
  }
  entry=elem;
  return entry;
}


void print(dListe x)
{
  dListe ptr;

  for (ptr= x; ptr!= NULL; ptr=ptr->flink) {
    printf("%d -> ", ptr->val);
  }
  printf("\n");
}


main()
{
  init();

  dListe x;
  x=NULL;

  while(any){
    x=add(x,any);
  }

  printf("Doubly linked list of a random length\n");
  print(x);
}