/// <summary>
/// Gets all subtrees with given sum.
/// </summary>
/// <param name="tree">The tree from which to be extracted subtrees.</param>
/// <param name="sum">The sum that have to be formed by subtree sum values.</param>
/// <returns>A collection of all paths in subtrees.</returns>
public List<List<int>> GetAllSubtreesWithGivenSum(Tree<int> tree, int sum)
{
var subtreesDictionary = this.CreateDictionaryForSubtrees(tree.Nodes.ToList());
var rootNode = tree.ParentNode;
subtreesDictionary[rootNode] = this.BuildSubtrees(rootNode, subtreesDictionary);
var rootNodes = this.FilterSubtreesWithGivenSum(subtreesDictionary, sum);
var allSubtreesWithGivenSum = this.ConnectSubtreePaths(rootNodes);
return allSubtreesWithGivenSum;
}
public static void Main(string[] args)
{
Console.WriteLine("Insert N: ");
int numberOfNodes = int.Parse(Console.ReadLine());
Tree tree = new Tree();
Queue<int[]> notAdded = new Queue<int[]>();
for (int i = 0; i < numberOfNodes - 1; i++)
{
Console.WriteLine("Insert parent[{0}] and child[{0}] values separated: ", i);
string line = Console.ReadLine();
string[] values = line.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
int parent = int.Parse(values[0]);
int child = int.Parse(values[1]);
if (tree.Add(parent, child) == false)
{
notAdded.Enqueue(new int[] { parent, child });
}
}
while (notAdded.Count != 0)
{
int[] parentChildValues = notAdded.Dequeue();
int parent = parentChildValues[0];
int child = parentChildValues[1];
if (tree.Add(parent, child) == false)
{
notAdded.Enqueue(parentChildValues);
}
}
tree.ReadTree();
Console.WriteLine("=====Root=====");
Console.WriteLine(tree.Root);
var leadNodes = tree.GetLeafNodes();
Console.WriteLine("=====LeafNodes=====");
for (int i = 0; i < leadNodes.Count; i++)
{
Console.WriteLine(leadNodes[i]);
}
var middleNodes = tree.GetMiddleNodes();
Console.WriteLine("=====MiddleNodes=====");
for (int i = 0; i < middleNodes.Count; i++)
{
Console.WriteLine(middleNodes[i]);
}
Console.WriteLine();
Console.WriteLine("=====Longest path=====");
Console.WriteLine(string.Join(", ", tree.GetLongestPath()));
Console.WriteLine();
Console.WriteLine("=====All paths with Sum 9 =====");
tree.PrintPathsBySum(9);
Console.WriteLine();
Console.WriteLine("=====All subtrees with Sum 6 =====");
tree.FindSubtreesWithGivenSum(6);
Console.WriteLine();
Console.WriteLine("=====All subtrees with Sum 12 =====");
tree.FindSubtreesWithGivenSum(12);
Console.WriteLine();
Console.WriteLine("=====All subtrees with Sum 21 =====");
tree.FindSubtreesWithGivenSum(21);
}