public int FindFuncValue(int i, int j, RmsNode node = null)
{
if (Root == null)
{
throw new Exception("Tree is not initialized");
}
if (node == null)
{
node = Root;
}
if (node.LeftIndex == i && node.RightIndex == j)
{
return(node.Value);
}
if (node.LeftChild.LeftIndex <= i && node.LeftChild.RightIndex >= j)
{
return(FindFuncValue(i, j, node.LeftChild));
}
if (node.RightChild.LeftIndex <= i && node.RightChild.RightIndex >= j)
{
return(FindFuncValue(i, j, node.RightChild));
}
var left = FindFuncValue(i, node.LeftChild.RightIndex, node.LeftChild);
var right = FindFuncValue(node.RightChild.LeftIndex, j, node.RightChild);
return(left <= right ? left : right);
}
private RmsNode CreateUpwardNode(List <RmsNode> nodes)
{
if (nodes.Count == 2)
{
var value = nodes[0].Value <= nodes[1].Value ? nodes[0].Value : nodes[1].Value;
var root = new RmsNode(value, nodes[0].LeftIndex, nodes[1].RightIndex, null);
root.LeftChild = nodes[0];
root.RightChild = nodes[1];
nodes[0].Parent = root;
nodes[1].Parent = root;
return(root);
}
var newNodes = new List <RmsNode>();
for (int i = 0; i < nodes.Count / 2; i++)
{
var value = nodes[2 * i].Value <= nodes[2 * i + 1].Value ? nodes[2 * i].Value : nodes[2 * i + 1].Value;
var node = new RmsNode(value, nodes[2 * i].LeftIndex, nodes[2 * i + 1].RightIndex, null);
node.LeftChild = nodes[2 * i];
node.RightChild = nodes[2 * i + 1];
nodes[2 * i].Parent = node;
nodes[2 * i + 1].Parent = node;
newNodes.Add(node);
}
if (nodes.Count % 2 == 1)
{
newNodes.Add(nodes[nodes.Count - 1]);
}
return(CreateUpwardNode(newNodes));
}
public RmsNode(int value, int leftIndex, int rightIndex, RmsNode parent)
{
Value = value;
LeftIndex = leftIndex;
RightIndex = rightIndex;
Parent = parent;
LeftChild = null;
RightChild = null;
}
public void FormTreeUpward()
{
var basicNodes = new List <RmsNode>();
for (int i = 0; i < _array.Length; i++)
{
basicNodes.Add(new RmsNode(_array[i], i, i, null));
}
Root = CreateUpwardNode(basicNodes);
}
private RmsNode CreateTopDownNode(int startIndex, int stopIndex, RmsNode parent)
{
if (startIndex == stopIndex)
{
return(new RmsNode(_array[startIndex], startIndex, stopIndex, parent));
}
var value = _func(_array, startIndex, stopIndex);
var node = new RmsNode(value, startIndex, stopIndex, parent);
var centralIndex = (startIndex + stopIndex) / 2;
node.LeftChild = CreateTopDownNode(startIndex, centralIndex, node);
node.RightChild = CreateTopDownNode(centralIndex + 1, stopIndex, node);
return(node);
}
public void FormTreeTopDown()
{
Root = CreateTopDownNode(0, _array.Length - 1, null);
}