# Questions tagged [binary-tree]

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### Binary tree deepcopy using the Morris traversal in C

I need to perform a deep copy of a binary tree using the Morris traversal. I think I managed to do it, that is the code below returns what I expect; however, I am not 100% sure I have covered every ...
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1 vote
107 views

### Maximum Sum BST in a Binary Tree

I was trying to find the Maximum sum BST of a binary tree on LeetCode. While the Java code I have come up with, mostly seems right and is able to pass 55 out of the given 59 test cases too, the error ...
78 views

### Semi-dynamic range minimum query (RMQ) tree in Java

Introduction I have this semi-dynamic range minimum query (RMQ) tree in Java. It is called semi-dynamic due to the fact that it cannot be modified after it is constructed. However, the values ...
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### Sort array of numbers using tree sort - Leetcode 912

Problem statement: Sort integer array nums in O(N log N) time, without relying on any library sort routine. I am trying to use a tree sort method (using the ...
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### Binary tree struct in C

Its been done to death, but the particular prompt (see Assignment 4) guiding me has strict+simple requirements that lead to a nice reduced environment to critique poor form. The project implements a ...
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111 views

### Delete a node in binary tree

Problem Statement Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node reference (possibly updated) of the BST. Basically, the deletion ...
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66 views

### Is this iterative inorder traversal algorithm well-known?

I was concerned about the approach in Morris traversal algorithm and came up with simpler solution that uses parent pointers in nodes. The constraints were following: Time Complexity: O(n) Space ...
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### leetcode 530. In-order traversal of a binary search tree (C++17)

Given a binary search tree, the problem requires calculating the minimum absolute difference between any two keys in the tree. Given the binary search property, the minimum difference must be between ...
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940 views

### A toy implementation of binary tree

I'm playing around with a toy implementation of binary trees in C. I have a typedef'd struct BTree like so — ...
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4k views

### Max-heap implementation in C

I have tried to implement my Heap in C. The following are the 13 operations defined: build_maxheap insert exctract_max (delete heap max root) max_delete (delete an element or key) max_heapify clear ...
• 525
1 vote
98 views

### 'Learning' Animal Guesser Program

I've written a program that uses a binary tree to essentially 'learn' about animals given the name and questions about them. Learn is probably a little strong of a word, all it does is store the ...
1 vote
140 views

### Binary space partition implemented in Rust which operates on a 2D vector

So I have this binary spaced partition leaf: ...
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278 views

### Binary Expression Tree that evaluates Postfix input

My code for a Binary Expression Tree that takes postfix input from the user and recursively builds and evaluates the expression. Proper input can be assumed. ...
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### Lowest Common Ancestor of a Binary Tree in Rust

I am trying to solve the lowest common ancestor problem in Rust. It is guaranteed that the id's of the tree are unique. It is also guaranteed that the two nodes which we are looking for in the tree ...
3k views

### Create and view a family tree

I have an assignment due Friday to make a family tree. Started to code in January. My reviews from the teacher for this code was that the use of pointers was horrendous and it wasn't OOP enough. This ...
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527 views

### Huffman coding implementation in java

I wrote a simple huffman coding algorithm for learning and practice. I just used the technique given on the wikipedia page. Could you tell me my missing points and mistakes? Node.java ...
233 views

### C library implementing binary trees

This is my first attempt at writing a library in C. I have only included tree creation and in-order traversal function for now, but will expand to have more functions soon. I have three files, ...
156 views

### Leetcode 662: maximum width of binary tree in Java

I have the following solution to this problem. The idea is to compute the maximum width of a binary search tree. The width of a BST on a particular depth is defined as the distance from the leftmost ...
• 28.3k
1 vote
138 views

### Binary Tree Level-Wise Creation and Traversal

I have used a queue, which has been implemented using a singly linked list, to facilitate the level-wise creation and traversal of the binary tree. ...
1 vote
201 views

### Sink algorithm in Max Heap Correctness

I am trying to determine the correctness of a helper method within my MaxHeap class. The goal of this helper method is, given the index of any node in the Max Heap, sink it to the correct level in the ...
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### Find ALL duplicate subtrees. using recursion

This is just a practice exercise, I'm trying to understand dynamic programming as deeply as I can. I solved this using recursion, though I am not sure if it will always work. If anyone could tell me a ...
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1 vote
147 views

### Patricia tree implementation in Rust

I've implemented a map using a Patricia tree, using u64 as keys. I would like general feedback on my code, but I have one thing that I think could be implemented in ...
• 615
93 views

### Deserialize a binary breadth-first in functional programming

A while back, I answered this question on Stack Overflow that involved deserializing a binary tree breadth-first using functional programming (the question itself isn't relevant). I'd like to make ...
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105 views

### AVL Tree in C Criticism

I have made an AVL tree in C and coded the basic functionality of insertion, deletion, and search. I would love some criticism on my implementation especially on the insertion and deletion section of ...
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1 vote
140 views

### How can I optimize this Binary Search Tree?

I've added some methods to a basic BST implementation for integers - if anyone can point out some ways that this could be written in a more efficient or clean manner, please let me know. ...
192 views

### Implementation of binary tree traversal

Based on what i understood of Binary Tree, queue and recursion I implemented this Breadth First Search algorithm as follows. Do you have any suggestions to improve (in term of readability, good ...
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1 vote
198 views

### Find Binary Tree Path Sum

I am trying to resolve following problem. Please advice which part of the code can be improved. Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the ...
196 views

### Lowest Common Ancestor in Binary Tree (Iterative)

In the below code I've implemented a method to find the lowest common ancestor of a binary tree. This is an iterative approach using this pseudocode. Please suggest any improvements that can be made. <...
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129 views

### HackerRank - Binary tree to compute the Nth power of natural numbers that sum up to X

I'm trying to solve this challenge on HackerRank. In short, given x and n, I have to determine how many ways I can pick numbers ...
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173 views

### Binary PATRICiA Prefix Trie

I was wondering if we could speed-up lookup in a hash table of strings by only storing the difference between them, like HAMT. Taking this idea to its end, I ended up with a binary PATRICiA prefix-...
• 1,050
1 vote
212 views

### Best way to store the sum of all node depths?

To sum up all the nodes' depths in any given binary tree, I've written the following recursive algorithm: ...
132 views

### AVL Tree implementation Based on VisualGo

I have tried implementing an AVL Tree on my own, based on visualising it. But i'm unsure how many testcases it work with, and how efficient it is. Are there any ways to make it efficient, and compact? ...
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414 views

### C++ Random Tree Node

I've been trying to kind of teach myself "Modern C++" the last couple of months and I just finished this interview type problem and thought it would be a good one to get some feedback on. I not ...
1 vote
268 views

### Leetcode: Cousins in Binary Tree

Mu solution to Leetcode problem Cousins in Binary Tree works, but the code feels bulky. Is there a better way to solve this problem, particularly to use less additional variables? I will appreciate ...
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465 views

### C word frequency counter

I write this program based on the algorithm of the word frequency counter program on the K&R book, page 139. I added some idioms of mine, some command-line options, and a dynamically allocable ...
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### LeetCode: Deepest Leaves Sum C#

Given a binary tree, return the sum of values of its deepest leaves. Constraints: The number of nodes in the tree is between 1 and 10^4. The value of nodes is between 1 and 100. ...
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41 views

### I need to know that if everything okay in my BTS put and get method

I implement BinaryTree (K extends Comparable, V) concept to binarySearchTree and I have written get and put method. As far as I check, there is no problem in my code. So now I wonder that are there ...
1 vote
2k views

### Binary Search Tree in c++ used to count words in a text

I just created a BinarySeachTree class in c++ which is supposed to store words read from a txt and the number of occurances of those words and i would just like some feedback from you. I think it ...
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### Simple BST implementation using C++ Struct

I am trying to implement DSs in C++ and this is BST insert and search functions. I tried in two different ways, please review and see if one is advantageous over other. With pointer to pointer ...
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### Simple Binary Search Tree Class with Insert and Search Functions

I am trying to learn to implement DSs in C++ and here is a simple implementation. Please review in terms of optimization, memory management, coding standards, etc ...
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168 views

### LeetCode: Most Frequent Subtree Sum

My solution to LeetCode problem Most Frequent Subtree Sum works, but I have several questions regarding the code. I am also looking for an advice on how to improve the code. Problem: Given the ...
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