//Zad.7 Usuwanie elementu x
void DelX(node*&H, int x)
{
	if (H != NULL)
	{
		node*p = H;
		if (p->next == NULL && p->val == x)
		{
			H = NULL;
			delete p;
		}
		while (p->val != x && p != NULL)
		{
			p = p->next;
			if (p->next == NULL && p->val == x)
			{
				node*e = H;
				while (e->next->next != NULL)
				{
					e = e->next;
				}
				e->next = NULL;
				delete p;
			}
		}
		if (p != NULL)
		{
			node*e = H;
			while (e->next != p)
			{
				e = e->next;
			}
			e->next = p->next;
			delete p;
		}
	}
}