public static void Split(FastTreap tree, ref int val, out FastTreap L, out FastTreap R)
{
if (tree.Val <= val)
{
if (tree.Right == null)
{
R = null;
}
else
{
Split(tree.Right, ref val, out tree.Right, out R);
}
L = tree;
}
else
{
if (tree.Left == null)
{
L = null;
}
else
{
Split(tree.Left, ref val, out L, out tree.Left);
}
R = tree;
}
}
public static void Remove(ref FastTreap tree, int val)
{
if (tree == null || !Contains(tree, val))
{
return;
}
Split(tree, ref val, out tree, out FastTreap R);
if (tree.Val == val)
{
tree = Merge(tree.Left, R);
return;
}
else
{
FastTreap deleted = tree;
while (deleted.Right.Val != val)
{
deleted = deleted.Right;
}
deleted.Right = null;
tree = Merge(tree, R);
}
}
public static bool Contains(FastTreap tree, int val)
{
while (tree != null)
{
if (tree.Val == val)
{
return(true);
}
tree = val < tree.Val? tree.Left : tree.Right;
}
return(false);
}
public static void Add(ref FastTreap tree, int val)
{
if (tree == null)
{
tree = new FastTreap(val);
return;
}
if (Contains(tree, val))
{
return;
}
Split(tree, ref val, out tree, out FastTreap R);
FastTreap node = new FastTreap(val);
tree = Merge(tree, node);
tree = Merge(tree, R);
}
private void TestCartesianTree(int[] vals)
{
if (dataGridView1.Rows.Count < 2)
{
dataGridView1.Rows.Add();
}
else
{
dataGridView1.Rows[1].Cells[0].Value = "";
dataGridView1.Rows[1].Cells[1].Value = "";
dataGridView1.Rows[1].Cells[2].Value = "";
dataGridView1.Rows[1].Cells[3].Value = "";
}
dataGridView1.Rows[1].Cells[0].Value = "Декартовое дерево";
Stopwatch stopWatch = new Stopwatch();
FastTreap test = null;
stopWatch.Restart();
for (int i = 0; i < vals.Length; i++)
{
FastTreap.Add(ref test, vals[i]);
}
stopWatch.Stop();
dataGridView1.Rows[1].Cells[1].Value = stopWatch.ElapsedTicks.ToString();
stopWatch.Restart();
for (int i = 0; i < vals.Length; i++)
{
FastTreap.Contains(test, vals[i]);
}
stopWatch.Stop();
dataGridView1.Rows[1].Cells[2].Value = stopWatch.ElapsedTicks.ToString();
stopWatch.Restart();
for (int i = 0; i < vals.Length; i++)
{
FastTreap.Remove(ref test, vals[i]);
}
stopWatch.Stop();
dataGridView1.Rows[1].Cells[3].Value = stopWatch.ElapsedTicks.ToString();
}
public static FastTreap Merge(FastTreap L, FastTreap R)
{
if (L == null)
{
return(R);
}
if (R == null)
{
return(L);
}
if (L.Priority > R.Priority)
{
L.Right = Merge(L.Right, R);
return(L);
}
else
{
R.Left = Merge(L, R.Left);
return(R);
}
}