typedef struct List{
  struct List *next;  
  int val;
}* Liste;



Liste add(Liste entry, int val)
{
  Liste elem;
  elem=malloc(sizeof(struct List));
  elem->val=val;
  if (entry==NULL){
    elem->next=elem;
  }
  else {
    elem->next=entry->next;
    entry->next=elem;
  }
  entry=elem;
  return entry;
}