multiway-tree | 易学教程

Rank Tree in C++

阅读更多关于 Rank Tree in C++

问题 We need ADT having search and rank features. That is, in addition to the interface of STL map, a function 'int get_rank(key)' is required. Standard implementation of such function requires supporting and updating an extra integer field in every node of self-balanced searching tree (e.g., in black-red tree, used in STL map/set). But it seems, STL map/set do not do this. We're looking for a solution based on standard containers (STL, Boost) having the best possible Time Complexity: finding

Minimum damaging costs in graph

阅读更多关于 Minimum damaging costs in graph

问题 We are given a graph G(V,E) with N nodes (Numbered from 0 to N-1) and exactly (N-1) two-way Edges . Each edge in a graph has a positive cost C(u,v) (Edge weight). The entire graph is such that there is a unique path between any pair of Nodes . We are also given a List L of node number,at which bomb are placed. Our aim is to damage/remove the edge from the graph such ,that after damaging/removing the edges from the graph ,there is no connection among the Bombs -- that is after damaging, there

Minimum damaging costs in graph

阅读更多关于 Minimum damaging costs in graph

Drawing & Rendering Multiway Tree in Python

阅读更多关于 Drawing & Rendering Multiway Tree in Python

问题 Does somebody know how do I plot a multiway-tree in a aesthetically plausible way? info: more or less 100 items each level have approximately the same number of items 10 levels each node have between 0(leaf) and 6 childs each node specify it's own level, no matter his roots. I'm currently using PIL, dividing each "line" in img.size()[0] /number of nodes, and drawing lines with draw.line to represent edges, but it is completely messed up I hope you can help me =], any information needed I'll

How to implement a Non-Binary tree

阅读更多关于 How to implement a Non-Binary tree

问题 I am having trouble implementing a non-binary tree, where the root node can have an arbitrary amount of child nodes. Basically, I would like some ideas on how where to go with this, since I do have some code written, yet I'm stuck at this point on what to do next. BTW I cannot use any of the Collections classes at all. I can only use System. using System; namespace alternate_solution { // [root] // / / \ \ // text text text text class Node//not of type TreeNode (since Node is different from

Fold / Recursion over Multiway Tree in f#

阅读更多关于 Fold / Recursion over Multiway Tree in f#

问题 I am trying to adapt Brian's Fold for Bianary Trees (http://lorgonblog.wordpress.com/2008/04/06/catamorphisms-part-two/) to apply for Multiway trees. Summarizing from Brian's Blog: Data structure: type Tree<'a> = | Node of (*data*)'a * (*left*)Tree<'a> * (*right*)Tree<'a> | Leaf let tree7 = Node(4, Node(2, Node(1, Leaf, Leaf), Node(3, Leaf, Leaf)), Node(6, Node(5, Leaf, Leaf), Node(7, Leaf, Leaf))) Binary Tree Fold function let FoldTree nodeF leafV tree = let rec Loop t cont = match t with |

O(1) algorithm to determine if node is descendant of another node in a multiway tree?

阅读更多关于 O(1) algorithm to determine if node is descendant of another node in a multiway tree?

问题 Imagine the following tree: A / \ B C / \ \ D E F I'm looking for a way to query if for example F is a descendant of A (note: F doesn't need to be a direct descendant of A), which, in this particular case would be true. Only a limited amount of potential parent nodes need to be tested against a larger potential descendants node pool. When testing whether a node is a descendant of a node in the potential parent pool, it needs to be tested against ALL potential parent nodes. This is what a came

Drawing & Rendering Multiway Tree in Python

阅读更多关于 Drawing & Rendering Multiway Tree in Python

Does somebody know how do I plot a multiway-tree in a aesthetically plausible way? info: more or less 100 items each level have approximately the same number of items 10 levels each node have between 0(leaf) and 6 childs each node specify it's own level, no matter his roots. I'm currently using PIL, dividing each "line" in img.size()[0] /number of nodes, and drawing lines with draw.line to represent edges, but it is completely messed up I hope you can help me =], any information needed I'll post. So, rendering graphs is the particular genius of graphviz , which also happens to have several

How to implement a Non-Binary tree

阅读更多关于 How to implement a Non-Binary tree

I am having trouble implementing a non-binary tree, where the root node can have an arbitrary amount of child nodes. Basically, I would like some ideas on how where to go with this, since I do have some code written, yet I'm stuck at this point on what to do next. BTW I cannot use any of the Collections classes at all. I can only use System. using System; namespace alternate_solution { // [root] // / / \ \ // text text text text class Node//not of type TreeNode (since Node is different from TreeNode) { public string data; public Node child; public Node(string data) { this.data = data; this

Rank Tree in C++

阅读更多关于 Rank Tree in C++

We need ADT having search and rank features. That is, in addition to the interface of STL map, a function 'int get_rank(key)' is required. Standard implementation of such function requires supporting and updating an extra integer field in every node of self-balanced searching tree (e.g., in black-red tree, used in STL map/set). But it seems, STL map/set do not do this. We're looking for a solution based on standard containers (STL, Boost) having the best possible Time Complexity: finding/adding/erasing an element take O(log n) (like in STL map/set), computing the rank by a key takes also O(log