Binary search is an efficient algorithm for finding a key in sorted data. It runs in O(log n) time.
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votes
0answers
8 views
Find floor value of log base 2 using binary search [on hold]
I want to find floor value of log base 2 (i.e. floor(log2 n)) and count the comparison.
I wrote this code:
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4
votes
1answer
68 views
Find valid triples for a sorted list of integers
I'm working on a problem in which I have an input array, sorted positive unique integers, and have to try to find all possible triples \$(x,y,z)\$ which satisfy \$x+y>z\$ and \$x<y<z\$. For ...
3
votes
2answers
71 views
Find max element in increasing-decreasing array
Question: Find the largest in a list that list is stored as two sections, one in ascending order and the other in descending order. Elements are distinct.
E.g: Input ...
2
votes
2answers
169 views
1
vote
1answer
56 views
Binary search for random access iterators in C++
I wrote a generic binary search routine in C++ for ranges that are specified by random access iterators. In case the user inputs a range with non-random access iterators, an exception will be thrown. ...
6
votes
2answers
66 views
Binary search a 2D array for multiple matching criteria fields
Here is what I came up with for a binary search of an array. It allows for searching one or many columns to match. It assumes that array being searched is sorted with the same sort priorities as the ...
3
votes
1answer
41 views
Search in sorted matrix NxM
The problem (from Cracking the Coding book):
Given an NxM matrix in which each row and each column is sorted in ascending order, write a method to find an element.
I thought of a modified ...
3
votes
3answers
159 views
Binary search of an integer array
I'm a beginner. This is my implementation of binary search algorithm in Python. Please review my code and give your valuable inputs for further improvements on overall coding style, rare cases etc.
<...
0
votes
1answer
32 views
Implementation of the binary search algorithm [closed]
This is my first implementation the binary search algorithm. I have tested it and so far it is okay. But I need an experienced eye to review the code and recommend best practices.
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3
votes
3answers
69 views
Binary search that gets ALL matching results
I am implementing a binary search to retrieve all matches of a specified value. Instead of a regular binary search that would just return the first match, I want to get that first match AND all ...
3
votes
2answers
74 views
Making a sorted linked list into a balanced binary search tree
My code works, but I need help on revising it to make it shorter and simple if possible on my main.cpp part ONLY. The other files is to make the program compile and work out if you want to see the ...
3
votes
2answers
97 views
Calculate the path sum of a binary tree
I want to calculate all sum of all possible paths from root to leaf. Each node has value of an integer number (decimal).
In the following example:
...
4
votes
3answers
103 views
Finding the frequency of an element in a sorted list of integers
Input: Array of sorted integers and an element to check the frequency for
Output: Frequency of the element
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9
votes
3answers
761 views
Binary search in C#
The challenge requires the program to receive data from the console and use binary search to find if a term is contained in a set of other terms. I've unit-tested the solution below, but according to ...
2
votes
1answer
72 views
Deletion of a node in a binary search tree
I am looking to see if my implementation of the removal/deletion method in a binary search tree is sufficient, readable, and runs in \$O(\log n)\$ time. It's been awhile since I've written a data ...
3
votes
1answer
90 views
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 ...
-5
votes
1answer
70 views
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 given....
4
votes
3answers
323 views
Find median of two sorted arrays
Problem statement
There are two sorted arrays nums1 and nums2 of size m and ...
1
vote
3answers
285 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:
...
0
votes
0answers
50 views
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
...
2
votes
3answers
93 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, ...
0
votes
0answers
17 views
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 ...
5
votes
2answers
77 views
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 ...
0
votes
1answer
47 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 ...
3
votes
1answer
91 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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votes
1answer
58 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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2
votes
2answers
138 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 ...
2
votes
1answer
81 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 the ...
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votes
3answers
263 views
Binary search algorithm
Would this recursive solution's speed be comparable to a non-recursive solution?
...
3
votes
0answers
2k 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 ...
2
votes
3answers
66 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 of ...
3
votes
1answer
72 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 ...
2
votes
1answer
97 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:
...
3
votes
2answers
78 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 ...
1
vote
0answers
94 views
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 ...
5
votes
1answer
363 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 integer ...
7
votes
3answers
2k 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?
...
8
votes
3answers
750 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 ...
4
votes
1answer
134 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 ...
3
votes
1answer
58 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.
...
2
votes
1answer
80 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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1
vote
2answers
256 views
Sorting an Integer array
The program sorts the array from lowest to highest and outputs the index of the searched value:
...
3
votes
1answer
89 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 ...
4
votes
3answers
291 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
...
3
votes
2answers
49 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 ...
4
votes
3answers
4k views
Recursive Level Order traversal
I have come up with this code to do level order traversal recursively for a binary search tree.
...
7
votes
4answers
14k 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 ...
3
votes
2answers
169 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 ...
5
votes
1answer
207 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 ...
7
votes
2answers
1k 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 stack,...
