Binary search is an efficient algorithm for finding a key in sorted data. It runs in O(log n) time.

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Binary search tree class in Java

I am trying to create a binary search tree class in Java and am wondering how I did. I am fairly confident on most of the methods, but fear I may have messed up the delete method. I know I am ...
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Maximum clique using binary matrix adjacency [closed]

I'm solve the maximum clique problem. I'm using binary matrix adjacency to represent the graph. But when I test using the DIMACS-benchmark, my answer is far more different compared to the answer ...
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271 views

Find median of two sorted arrays

Problem statement There are two sorted arrays nums1 and nums2 of size m and ...
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167 views

Priority Queue (Binary Search Tree) Implementation

I have made a Priority Queue implemented as a Binary Search Tree. I would appreciate comments related to optimization and proper functionality, but any comments/critiques are welcome. PQ.h: ...
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Binary search tree and breadth first search

I have written code to implement Binary Search and Breadth First Search in JS. Please review my code. I want to ensure Im following the best practices. Node.js ...
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3answers
85 views

Minimum element in a sorted rotated array

A sorted array [0,1,2,3,4,5] when rotated n times (3 times in this case) becomes [3,4,5,0,1,2], meaning elements in the front move to the end. The code below finds the minimum element in this array, ...
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Alphanumerica binary search in node.js

I have some rather large arrays with hash values in them that looks like this: ZjFhOTZjYzgtMmZhMy00YjdkLThmMDgtNjI4MjYxNTc3MGRlXw==ntyxntmzmzkw I've done a binary search, using the node.js ...
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Recursive binary search implementation in Python

I have this (recursive) binary search implementation in Python, and I want you to criticize every aspect of it. It is a naive implementation, (drilling the basics and stuff), but, I want you to ...
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1answer
41 views

Couting numbers greater than given - using binary search

It's my first exercise involving the well-known binary search. The problem goes as follows: we are given a sequence of n numbers and we have to answer to t questions, each of which is: “How many ...
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87 views

Python 2 binary search

I wanted to take a stab at implementing a binary search, and here's what I came up with. Is there anything I could have done better, from a code clarity perspective, or code optimization perspective? ...
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49 views

Finding the minimum from a sorted rotated array with duplicates

Is this an efficient way of finding the minimum using binary search? ...
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2answers
122 views

Template Binary Search Tree

This is a simple binary search tree implementation written with C++'s templates feature I wrote to learn C++. What improvements would make this cleaner and better as far as C++ practices go, and are ...
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1answer
79 views

Find the number of quadraples (a,b,c,d) from 4 respective arrays such that a+b+c+d=0

Given four lists of numbers, calculate how many ways there are to choose one element from each to get a sum of zero. The input is given on stdin, first ...
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239 views

Binary search algorithm

Would this recursive solution's speed be comparable to a non-recursive solution? ...
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732 views

Breadth and Depth First Search in Ruby

I was tasked with building three individual methods; one to create a Binary Search Tree (BST), one to carry out a Breadth First Search (BFS), and one to carry out a Depth First Search (DFS). Create ...
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3answers
64 views

Locating a sequence in a sorted array

I read the following question: Searching an element in a sorted array and I thought that I could give it a try in Python. Given a sorted list of integers and an integer. Return the (index) bounds ...
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1answer
64 views

Binary and linear search methods for a number-guessing game

This is a code written is Pascal (Delphi). It asks the user to think of a number between min_ and max_ and then guesses the ...
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1answer
89 views

Binary search function

I have written this function to perform a binary search on an array, given begin/end indices and a value to look for in the supplied array: ...
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2answers
72 views

Binary search attempt

I've heard about the binary search in an intro class I took a couple months ago, remembered how it worked and read this article, so I attempted to write my first binary search in Python. It works, but ...
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Variations on binary searching an ordered list

In the wikipedia article about the binary search algorithm (https://en.wikipedia.org/wiki/Binary_search_algorithm) a small paragraph in particular got my attention. Midpoint and width A ...
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272 views

Find maximum element in bitonic array

An array is bitonic if it is composed of an increasing sequence of integers followed immediately by a decreasing sequence of integers. Write a program that, given a bitonic array of N distinct ...
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754 views

Recursive binary search in Python

I have implemented a recursive binary search in Python and tried to implement some verification to my code. Other than that, is there any optimization I am missing? ...
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726 views

Computer guesses the user's number

After the feedback for my last script, I realized I should be using functions and trying to adhere to the style guide. I tried to do that here, though still very beginner. The rounding in Python ...
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1answer
126 views

Binary search implementation [closed]

Is there a better way to implement a binary search than I am in my code? My function is taking two two lists - first_booth_voters and ...
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1answer
51 views

Shell binary search with sorted input

I have coded binary search in shell, just for practice. Input Input data is already sorted set of numbers streamed to the script. $1 is the sought number. ...
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1answer
76 views

Efficiency of binary search and improvements

Below you can see my binary search method, and as a relatively new programmer I am looking for any suggestions on how it could be improved. ...
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Sorting an Integer array

The program sorts the array from lowest to highest and outputs the index of the searched value: ...
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1answer
80 views

Substring searching with Knuth–Morris–Pratt

My program uses the Knuth–Morris–Pratt algorithm to search for a particular substring in a .txt file and then store it in a binary search tree. Note that ...
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242 views

Binary search tree implementation (with Node class)

I have implemented the Binary Search Tree in Java and would love to get reviews. I would like to have some comments on multi thread implantation. Note: Corrected Code is in the Answers ...
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47 views

Binary search feedback and improvements

I implemented the binary search algorithm. Input vector is sorted by < than operator implemented by type T. The less than ...
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3k views

Recursive Level Order traversal

I have come up with this code to do level order traversal recursively for a binary search tree. ...
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9k views

Simple Binary Search Tree

At the moment I am learning algorithms and here I am trying to implement a simple binary search tree. I would like to know your suggestions on whether I am on the right track or not, and how this can ...
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157 views

Epilogue to a binary search to find the range of matching indexes

I am trying to find out the best practice for writing a loop which does one check and at the same time has to increment a value so that the while loop will ...
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1answer
177 views

Enter values, generate a list, and search

My assignment in school: Read in names to sort until the user types the “enter” key After sorting and displaying the array of strings Do a binary search to find if the string is in the array If the ...
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980 views

Quack - the revolutionary new data structure

I was having a chat with a friend about data structures (as you do), and that, and his love of portmanteaus meant that he came up with a Quack - A queue and a ...
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156 views

Persistent segment tree

I'm trying to solve this problem. Given a sequence \$B=B_0,B_1,\ldots,B_{N−1}\$ for each query \$(P,K)\$, find the minimum \$S\$ s.t. there are at least \$K\$ entries in \$B\$ that satisfies ...
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262 views

Binary Search Tree in C

I have implemented a BST from scratch. My aim is to draft better code and understand some pitfalls which I may have overlooked. It includes the following functionalities: Insert a new item. Find ...
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189 views

Binary search that returns bitwise complement of missing index

While re-writing some old JavaScript code to better handle large arrays, I ended up writing my own binary search method. I found many examples of binary search methods written in JavaScript, but all ...
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Find string in sorted array with interspersed empty strings

(from McDowell) Given a sorted array of strings which is interspersed with empty strings, find the location of a given string. eg. "ball" in ...
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Find the peak element using BS

A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that ...
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Basic Binary Tree in Go

As an exercise I have written a basic binary tree implementation in Go. Tree struct: ...
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Simple peak finder solution - O(log n)

I attempted a solution to a seemingly simple problem: Peak Finder Let input be a list. input[i] is a peak if ...
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Karate Chop Kata

I had some time to kill today, and I found the Karate Chop Kata. Specification: Write a binary chop method that takes an integer search target and a sorted array of integers. It should ...
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540 views

Binary search using recursion, iteration, shifted array

Interview question some engineer, asked me to write binary search in 2 ways, Also asked me to write binary search on a shifted array (10 20 1 2 3 4). Wrote that and then asked me to find the offset ...
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insertBST exercise

I'm just learning Haskell on my own, and did an exercise to implement insertBST. Is this idiomatic Haskell? ...
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Excel VBA binary search class module [closed]

I have a long list of sorted strings in a Workbook, and I have to find a lot of values in it. I was hoping to build a binary search Class Module that will find them for me faster than Excel's built-in ...
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89 views

Binary Search in C

The standard C library function bsearch wasn't giving me correct results, apparently. So I decided to implement a binary searching function in place of it. It ...
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Binary Search Tree in Ruby

Binary Search Tree, with preorder traverse. What other methods should I add? How can I improve it? ...
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Mini Binary Tree “library”

This is my first attempt at learning binary trees. I'm looking for general feedback on how it could be made cleaner, more idiomatic, or more efficient. ...
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Read binary file by blocks

I wrote a function that allow me to read a binary file using 3 blocks what ever the length of file. I've decided to divide the length of my file into 3: block 1: ______________ block 2: ...