public List(int v)
{
ListElement element = new ListElement(v);
info = new ListInfo(element);
}
public ListInfo(ListElement element)
{
head = element;
tail = element;
}
public ListElement(int v)
{
value = v;
next = null;
}
public ListInfo()
{
head = null;
tail = null;
}
public ListElement()
{
next = null;
}