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


Liste delete(Liste head,int delval)
{
  Liste prev, curr;
  curr=head;
  while(curr!=NULL){
    if(curr->val==delval)
      {
	if(head==curr)
	  {
	    head=curr->next;
	    free(curr);
	    curr=head;
	  }
	else
	  {
	    prev->next=curr->next;
	    free(curr);
	    curr=prev->next;
	  }
      }
    else
      {
	prev=curr;
	curr=curr->next;
      }
  }
  return head;
}