ЯМП кп списки №2

void xXx(Node*& stack)
{
    Node* tmp = stack;
    double average = 0, count = 0;
    while (tmp != nullptr)
    {
        average += tmp->Value;
        tmp = tmp->Next;
        count++;
    }

    average /= count;

    Node* tmp2 = tmp = stack;
    Node* tmp3 = stack;

    while (tmp != nullptr)
    {
        if (tmp->Value < average)
        {
            if (tmp == stack)
            {
                stack = stack->Next;
                tmp = stack;
                delete tmp3;
            }
            else if (tmp->Next == nullptr)
            {
                while (tmp2->Next != tmp)
                {
                    tmp2 = tmp2->Next;
                }
                tmp2->Next = nullptr;
                tmp3 = tmp;
                tmp = tmp2;
                delete tmp3;
            }
            else
            {
                tmp2 = stack;
                while (tmp2->Next != tmp)
                {
                    tmp2 = tmp2->Next;
                }

                tmp2->Next = tmp->Next;
                tmp3 = tmp;
                tmp = tmp2->Next;
                delete tmp3;
            }

        }
        tmp = tmp->Next;
    }
}