private bool HeapReq(TreapElement e)
{
TreapElement l = null, r = null;
if (e == null)
{
return(true);
}
if (e.left != null)
{
l = (TreapElement)e.left;
}
if (e.right != null)
{
r = (TreapElement)e.right;
}
if ((l == null || l.heap > e.heap) && (r == null || r.heap > e.heap))
{
return(true);
}
else
{
return(false);
}
}
public override void LeftRotation()
{
TreapElement r = (TreapElement)right;
int tmp = heap;
heap = r.heap;
r.heap = tmp;
base.LeftRotation();
}
public override void RightRotation()
{
TreapElement l = (TreapElement)left;
int tmp = heap;
heap = l.heap;
l.heap = tmp;
base.RightRotation();
}
public bool Insert(int element)
{
int heap = Convert.ToInt32((Console.ReadLine()));
InfoReturn res = base.Insert(data, new TreapElement(element, heap));
if (res.success)
{
data = (TreapElement)res.newRoot;
}
DownHeap(element);
return(res.success);
}
public bool Delete(int element)
{
// Pruefen, ob Element Exist
if (!base.Search(data, element)) //Element nicht gefunden
{
return(false);
}
// Element zu Blatt machen
UpHeap(element);
// Element loeschen
InfoReturn res = base.Delete(data, element);
if (res.success)
{
data = (TreapElement)res.newRoot;
}
return(res.success);
}
// Support methods
private void DownHeap(int element)
{
SearchResult s = data.SearchElement(element);
TreapElement current = (TreapElement)s.previous;
bool isLeft;
while (!HeapReq(current))
{
isLeft = (current.left == s.found) ? true : false;
if (isLeft)
{
current.RightRotation();
}
else
{
current.LeftRotation();
}
s = data.SearchElement(element);
current = (TreapElement)s.previous;
}
}
private void UpHeap(int element)
{
SearchResult s = data.SearchElement(element);
TreapElement current = (TreapElement)s.found;
TreapElement l = (TreapElement)current.left, r = (TreapElement)current.right;
while (current.left != null && current.right != null)
{
if (l != null && l.heap <= r.heap)
{
current.RightRotation();
}
else
{
current.LeftRotation();
}
s = data.SearchElement(element);
current = (TreapElement)s.found;
l = (TreapElement)current.left;
r = (TreapElement)current.right;
}
}