# Tagged Questions

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### Minimum value of a node in a binary search tree

I am making a program that returns the minimum value of a binary search tree recursively and I don't know how to implement it. I am stucked here, please help def bst_min(t): if t.is_leaf == True: ...
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### Extract All Possible Paths from Expression-Tree and evaluate them to hold TRUE

This is a follow-up question of my previous one: http://stackoverflow.com/questions/38421950/better-class-structure-for-logical-expression-parsing-and-evaluation Brief introduction: rules as ...
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### How do you achieve the 'BST Property' in a Template Binary Search Tree?

We recently started learning about binary search trees. We created one of our own using integers as our Key/Data. It's easy to achieve the BST property using an int key, but what happens when we ...
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### Binary Search Tree without Natural Ordering

This is kind of a multi-part question. Is it possible to do a binary search tree if the data does not possess natural ordering? Would you be forced to impose artificial ordering to such data? Like ...
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### Joining binary trees

Suppose we have a set of binary trees with their inorder and preorder traversals given and where no tree is a subtree of another tree in the given set. Now another binary tree Q is given. Find ...
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### BST to AVL in O(n) [closed]

I found in different places on the internet how to turn a Binary Search Tree into an AVL tree in O(nlog(n)). I was wondering how can this be done in O(n) (as the worst case limit). It kinda seems ...
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### Keeping track of the number of nodes in the subtree in black and red trees

I was wondering, if I have a black and red tree and I want to keep track of the number of nodes in the subtree, what is the most effective way to do so? I mean how do I work with these values while ...
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### Is this Red-Black tree insertion pseudocode from Introduction to Algorithms (CLRS) correct?

For the Red-black tree insertion fixup the book distinguishes between 6 cases, 3 of which are symmetric. The cases are (z is the node being inserted): Case 1: z's uncle is red Case 2: z's uncle is ...
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### Efficiently determining many-to-many subset relation

I'm doing market basket analysis. I have a set of transactions. Every transaction is a set of items that were bought. I then have a set of itemsets (i.e. a set of items) that I want to determine the ...
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### Comparison of Red/Black Tree to Java ArrayList, what are advantages of each? [closed]

I was looking over some of the general Big-O Algorithm Complexities for different data structures, and wondered what Java's ArrayList would be considered. Since I tend to default to an ArrayList in ...
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### Merging Two Binary Search Trees

What time in terms of Big O will it take to merge two BST's in One? Each having no of nodes n and height O(log n) with no common element. Resultant should be also a BST
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### Python object oriented programming problems while implementing binary search tree

I am shifting from procedural C programming to OOP Python programming and I faced some problems while implementing binary search trees. I cannot make my Tree_Node null in case of deleting it. In C I ...
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### How do binary trees use memory to store its data?

So I know that arrays use a block on contiguous memory addresses to store data to memory, and lists make use of static arrays and when data is appended to the list, if there is no room, a new static ...
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### Do binary trees serve a specific purpose in storing hierarchical data? What is their canonical use?

I understand the structure of binary trees and how to traverse them. However, I am struggling to realize their actual uses, purposes in programs and programming. When I think about 'real life' ...
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### Efficiently find whether Binary Search Tree is Height Balanced or not?

A binary tree is height balanced if and only if the two subtrees of root are height balanced and the difference between the two subtrees height is at most 1. I implemented a code in java to find ...
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### Is it possible to speed up a hash table by using binary search trees for separate chaining?

I want to implement a Hash Table using Binary Search Trees to reduce the search complexity in the Separate Chaining process from O(n) (using linked list) to O(log n) (using BST). Can this be done, and ...
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### Difference between sibling lists, left-child right-sibling binary tree and doubly-chained tree

The Wikipedia page for suffix trees descibes sibling lists as Each node has a pointer to its first child, and to the next node in the child list it is a part of. Wikipedia describes left-child ...
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### Is this Wikipedia pseudocode for in-order generic tree traversal correct?

Wikipedia states that the following algorithm works for any tree (not necessarily binary trees) Perform pre-order operation For each i (with i = 1 to n) do: Visit i-th, if present ...
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### how to traverse towards child node from parent node in n-ary tree? [closed]

In an n-ary tree... Given a reference to some child node And a reference to a distant parent of the referenced child node Is there a method that a parent node can use to figure out which of its ...
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### Level order sorted binary tree from a binary tree

Lets suppose we have a binary tree . Tree node structure is as struct node { int val ; struct node *left , *right ; } Now we have to sort the tree in level order manner . For example lets ...
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### Is there a known standard data structure which is a hash table that resolves collisions using a binary tree?

Is there a known standard data structure which is a hash table that resolves collisions using a binary tree? If so what is the name of this data structure? I imagine such a structure would be useful ...
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### Tournament bracket method to put distance between teammates

I am using a proper binary tree to simulate a tournament bracket. It's preferred any competitors in the bracket that are teammates don't meet each other until the later rounds. What is an efficient ...
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### Print bottom view of a binary tree

For a binary tree we define horizontal distance as follows: Horizontal distance(hd) of root = 0 If you go left then hd = hd(of its parent)-1, and if you go right then hd = hd(of its ...
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### Binary Tree/Knowledge Base design C++

Currently I have a binary tree template setup where my main is using it with strings to make a question/answer game. I'm using a knowledge base that works as an interface to the binary tree that main ...
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### Is Pre-Order traversal same as Depth First Search?

It seems to me like pre-order traversal and DFS are same as in both the cases we traverse from root till the left branch and back to root and then to the right branch recursively. Could any please ...
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### Unit testing to prove balanced tree

I've just built a self-balancing tree (red-black) in Java (language should be irrelevant for this question though), and I'm trying to come up with a good means of testing that it's properly balanced. ...
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### Convert Algebraic Expression directly into Binary Tree Structure (sans prefix / postfix)

I am looking all over internet to find a logic to convert an Algebraic Expression into a Binary Tree. I could only find ones where you first convert the algebra expression to postfix or prefix and ...
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### Balance Tree with depth n has how many nodes maximum?

I couldn't find the answer anywhere, but let's say we have a B-Tree with min = 1 and max = 2: What is the formula to calculate the maximum number of nodes in this B-Tree if the depth is say 100? This ...
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### Usefulness of pre and post order traversal of binary trees

This may be very naive, but I was wondering, it the context of binary trees (plain, sorted and balanced), of all the traversal types: depth-first pre-order depth-first in-order depth-first post-...
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### Morse Code - Binary Tree

How is the Morse Code representation of a letter determined? "E" = "." "T" = "-" Why is it not alphabetic? As in let "A" = ".", "B" = "-", "C" =".-", etc. I'm trying to develop an algorithm for a ...
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### What is the usage of Splay Trees in the real world?

I decided to learn about balanced search trees, so I picked 2-3-4 and splay trees. What are the examples of splay trees usage in the real world? In this Cornell: http://www.cs.cornell.edu/courses/...
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### Keeping binary search tree balanced

I am educating myself on algorithms and data structures. For that, I am doing a simple program that would read lines like this: bdhj 168.24 dahf 42.88 dhfa 128.92 First column represents an account ...
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### How should I setup a UI for editing a binary tree? [closed]

I need to allow the user to create an binary tree. I have a Backbone Model populating properly from the database, the problem I am stuck on is how do I setup the ui elements in a way that is fairly ...
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### Why can't an AVL tree be recreated using pre-order traversal?

Given a binary search tree, I understand why I can use breadth-first and pre-order traversal to list the entries of the tree in such a way as to reconstruct the tree in the order in which its ...
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### Do you get the benefits of a B-Tree in a managed language?

My understanding is that one of the key features of a B-Tree (and a B+Tree) is that it is designed such that the size of its nodes are some multiple of the block size of whatever media the data is ...
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### Is this the right strategy to convert an in-level order binary tree to a doubly linked list?

So I recently came across this question - Make a function that converts a in-level-order binary tree into a doubly linked list. Apparently, it's a common interview question. This is the strategy I ...
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### Speed of MySQL type index access vs. binary jump search on a huge file?

I am dead set on moving over to a MySQL database for some huge data sets I'm working with but right now I don't have the time. In the meantime I am curious about a technical performance issue ...