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# ALGORITHM QUESTIONS

What is the advantage of Lucene searching and indexing?
wish help you to fix your issue I believe you want us to compare two incomparable things. Quick Search is a string search algorithm, meant to find a string in a long text document.Lucene is a search library, meant to index and search a collection of
TAG : algorithm
Date : November 27 2020, 07:01 PM , By : user3863681
What is order notation f(n)=O(g(n))?
I wish did fix the issue. My view: For the first one I think it is average case and worst case form of time-complexity. am i right? and what else do i write in that?
TAG : algorithm
Date : November 27 2020, 07:01 PM , By : user3863659
Sorting a list of variable length integers delimited by decimal points
it fixes the issue All you really need to do is to write "compare()" and then you can plug that into any sort algorithm.To write compare, compare each field from left to right, and if any field is higher, return that that argument is higher. If one a
TAG : algorithm
Date : November 26 2020, 07:01 PM , By : kollinsayz
How does lucene index documents?
I hope this helps you . There's a fairly good article here: https://web.archive.org/web/20130904073403/http://www.ibm.com/developerworks/library/wa-lucene/Edit 12/2014: Updated to an archived version due to the original being deleted, probably the be
TAG : algorithm
Date : November 26 2020, 07:01 PM , By : user3863295
Water jugs heuristic function for A*
wish helps you There are two general methods how to design an admissible heuristic. Both work by solving a simpler problem. The heuristic value is then the distance to the goal in the simpler problem.1. Relaxation
TAG : algorithm
Date : November 26 2020, 07:01 PM , By : Futch
Run length encoding
this one helps. I think you maybe mis-understood the runtime. The algorithm on the wikipedia page is O(n) (where n is the length of the input). Notice how the index is the same for both loops, and increasing.
TAG : algorithm
Date : November 25 2020, 07:01 PM , By : rossburnett
Discover periodic patterns in a large data-set
I wish did fix the issue. You could use discrete autocorrelation to find the periods, then search for the keys. The advantages of autocorrelation are that it's a little easier to understand what's going on in the discrete domain, and you don't have t
TAG : algorithm
Date : November 22 2020, 07:01 PM , By : user3862300
Calculate the median of a billion numbers
I wish did fix the issue. Ah, my brain has just kicked into gear, I have a sensible suggestion now. Probably too late if this had been an interview, but never mind:Machine 1 shall be called the "control machine", and for the sake of argument either i
TAG : algorithm
Date : November 21 2020, 07:01 PM , By : user49624
How do i pack multiple rectangles in a 2d box tetris style
it fixes the issue Sounds like a variation of Bin Packing:
TAG : algorithm
Date : November 20 2020, 07:00 PM , By : Tammy Tate Ritter
Randomly generating sequence of ints in a specific range
seems to work fine The easiest way is probably to generate the list of required numbers and then shuffle it.
TAG : algorithm
Date : November 17 2020, 07:01 PM , By : user200825
tf-idf: am I understanding it right?
hope this fix your issue Not exactly actually: tf-idf gives you the relevance of a term in a given document.So you can perfectly use it for your clustering by computing a proximity which would be something like
TAG : algorithm
Date : November 15 2020, 07:01 PM , By : Leewin0821
Algorithm Question Maximize Average of Functions
I wish did fix the issue. I don't know about programming, but in mathematics functions of functions are called functionals, and the pertinent math is calculus of variations.
TAG : algorithm
Date : November 14 2020, 07:01 PM , By : sonal
Efficient method for finding KNN of all nodes in a KD-Tree
To fix this issue Depending on your needs, you may want to experiment with approximate techniques. For details, checkout Arya and Mount's work on the subject. A key paper is here. BigO complexity details are located in their '98 paper.A graphical ill
TAG : algorithm
Date : November 13 2020, 07:01 PM , By : clare
Looking for a good world map generation algorithm
To fix the issue you can do You could take a cue from nature and modify your second idea. Once you generate your continents (which are all about the same size), get them to randomly move and rotate and collide and deform each other and drift apart fr
TAG : algorithm
Date : November 12 2020, 07:00 PM , By : user3858994
Algorithm to get through a maze
fixed the issue. Will look into that further I think I recall your algorithm only working when you enter the maze through an entrance, hug a wall, and try to go out. For example, if you start at an "island" in the middle of the maze, it will not work
TAG : algorithm
Date : November 10 2020, 07:00 PM , By : Harshit Bhatt
What is a typical algorithm for finding a string within a string?
I hope this helps you . I like the Boyer-Moore algorithm. It's especially fun to implement when you have a lot of needles to find in a haystack (for example, probable-spam patterns in an email corpus).
TAG : algorithm
Date : November 09 2020, 07:01 PM , By : Hanson
How to judge the relative efficiency of algorithms given runtimes as functions of 'n'?
Does that help Consider two algorithms, A, and B. These algorithms both solve the same problem, and have time complexities (in terms of the number of elementary operations they perform) given respectively by , Which algorithm is the best asymptotical
TAG : algorithm
Date : November 09 2020, 07:01 PM , By : Allen
Algorithm video tutorial
To fix this issue Conway's Game of Life coded in one line of APL is pretty good. The video starts from a blank screen and builds the code up live in the interpreter. Although it's a specific problem, the steps in involved in the construction are very
TAG : algorithm
Date : November 09 2020, 07:01 PM , By : user3857984
Writing an algorithm for scrabble
I hope this helps you . You might be interested in Googling the research paper "The World's Fastest Scrabble Program" by Appel and Jacobson (1988). The algorithms are outlined in pseudocode, so it takes a bit of work to mold that into useable form an
TAG : algorithm
Date : November 08 2020, 07:01 PM , By : Zellefrow
Given an array of integers where some numbers repeat 1 time or 2 times but one number repeats 3 times, how do you find i
may help you . I assume the array is not sorted, or similary, repeats of a number don't appear in one contiguous run. Otherwise, the problem is really trivial: just scan the array once with a window of size 3, and if each number in that window is the
TAG : algorithm
Date : November 08 2020, 07:01 PM , By : user3857786
I hope this helps . This is a wonderful case for why memoization is a very useful optimization in functions such as Fibonacci.As you can see, you can reduce the number of function calls from 2*fib(n)-1 to n - which is orders of magnitude better.
TAG : algorithm
Date : November 06 2020, 07:00 PM , By : mikee
Bucket sort for integers
seems to work fine Counting sort will only work on integers, while bucket sort can work on anything with a value, also, the final loop is a bit different. Counting Sort maintains an additional array of ints, which basically counts how many of a certa
TAG : algorithm
Date : November 06 2020, 07:00 PM , By : normnet
Fastest real time decompression algorithm
TAG : algorithm
Date : November 05 2020, 07:01 PM , By : Alejandro Felipe
Substring and its reverse in a string
may help you . This is a variation on the Longest common substring problem. You are looking for the longest common substring of your input and its reverse. There may be a simpler solution for this specific case, but for the moment, I doubt it. =)
TAG : algorithm
Date : November 03 2020, 07:01 PM , By : Giorgio Silvani
What are some good algorithms for drawing lines between graph nodes?
I hope this helps . If your diagrams are not crazy full you should not need an extra-fancy algorithm for this, but just use some common sense.
TAG : algorithm
Date : November 02 2020, 07:01 PM , By : Nitin Gupta
What problem/s does a Rule Engine Algorithm solves?
it should still fix some issue A rules engine can encapsulate business logic, often in a declarative manner. This avoids the need to custom-code business logic in software.A rules engine algorithm is how the rule matching and triggering is implemente
TAG : algorithm
Date : November 02 2020, 07:01 PM , By : user3855650
How do I search for a number in a 2d array sorted left to right and top to bottom?
I wish did fix the issue. Here's a simple approach: Start at the bottom-left corner. If the target is less than that value, it must be above us, so move up one. Otherwise we know that the target can't be in that column, so move right one. Goto 2.
TAG : algorithm
Date : November 02 2020, 07:01 PM , By : Reinards Jānis Sauli
Graph coloring Algorithm
I hope this helps . It's an NP complete problem, read the Wikipedia entry for more information on various methods of solving.
TAG : algorithm
Date : October 31 2020, 08:00 PM , By : James Nguyen
Provable planarity of flowcharts
hope this fix your issue I disagree with Hooked. Flow charts, with some restrictions (using loops is NOT one of them), are planar. Some examples: A single primitive command translates to a planar graph (a single node) A sequence of statements: if the
TAG : algorithm
Date : October 31 2020, 08:00 PM , By : Mang Tatang
crossing edges in the travelling salesman problem
around this issue If two edges in a closed polygonal line cross, then there is a polygonal line with the same vertices but with smaller perimeter. This is a consequence of the triangle inequality. So, a solution to the TSP must be a simple polygon. S
TAG : algorithm
Date : October 31 2020, 08:00 PM , By : Jr. Programmer
Why are "Algorithms" and "Data Structures" treated as separate disciplines?
wish help you to fix your issue They are different. Consider graphs, or trees to be more specific. Now, a tree appears to only be a tree. But you can browse it in preorder, inorder or postorder (3 algorithms for one structure).You can have multiple o
TAG : algorithm
Date : October 30 2020, 08:01 PM , By : Mulitcore
Why does adding Crossover to my Genetic Algorithm gives me worse results?
Hope this helps It looks like your crossover operator is introducing too much randomness into the new generations, so you are losing your computational effort trying to improve bad solutions. Imagine that the Hill-Climb algorithm can improve a given
TAG : algorithm
Date : October 30 2020, 08:01 PM , By : user3854760
Which data structures and algorithms book should I buy?
this one helps. Don't buy any book use MIT OCW
TAG : algorithm
Date : October 30 2020, 08:01 PM , By : user3854707
I hope this helps you . the minimax algorithm presented in the textbook is usually applied on simple games, e.g. tic-tac-tou, where the final states are reachable within only several turns between min player and max player. However, for Gomoku, it is
TAG : algorithm
Date : October 30 2020, 08:01 PM , By : user3854703
What is the best algorithm to find a determinant of a matrix?
will help you Here is an extensive discussion.There are a lot of algorithms.
TAG : algorithm
Date : October 29 2020, 08:01 PM , By : user3854553
What is the value of n0?
wish help you to fix your issue Just started learning algorithm. But, I don't know what n0 represent in calculating time complexity. , Intuitively speaking, the statement f(n) = O(g(n)) means
TAG : algorithm
Date : October 28 2020, 04:55 PM , By : gms08
How to solve Traveling Salesman in SML?
wish of those help The brute force solution to traveling salesman is very straight forward. You populate a list of possible paths and pick the smallest one.As for doing this in SML there are a myriad of methods. It will firstly depend on what data st
TAG : algorithm
Date : October 28 2020, 04:55 PM , By : user3853851
Finding an optimal solution for targeting ships in a naval engagement
help you fix your problem Linear programming will do the job perfectly here. In this case, the decision variables are integers, so we are dealing with ILP.Here is a small description on how to model your problem as a linear program.
TAG : algorithm
Date : October 25 2020, 07:10 AM , By : Sorina Vlăsceanu
How to find trend (growth/decrease/stationarity) of a data series
hope this fix your issue I am trying to extract the OEE trend of a manufacturing machine. I already have a dataset of OEE calculated more or less every 30 seconds for each manufacturing machine and stored in a database. , You could go for asliding av
TAG : algorithm
Date : October 22 2020, 06:10 PM , By : techsmith
Significance of selection sort
Does that help It is simple to write and intuitive for people to understand It is the closest to the way real humans approach sorting lists. It functions in-place in memory After n iterations you know the first n elements are sorted. After the first
TAG : algorithm
Date : October 21 2020, 06:10 PM , By : J.Doe
How to solve a matrix reachability recursion problem efficiently?
wish of those help This has a solution in O(min(m2n, mn2)) time and O(min(m2, n2)) space using dynamic programming.The idea is to consider angled "strips" that look like this (in bold):
TAG : algorithm
Date : October 19 2020, 06:10 PM , By : shikha arora
Count number of subsets having cumulative XOR less than k
it should still fix some issue Depending on the constraints of the problem, there are several viable ways to approach it: As you pointed out, if N is small enough, trying all possible subsets in O(2^N) will yield the intended result. If the values in
TAG : algorithm
Date : October 19 2020, 06:10 PM , By : Ganesh Kumar Jindal
Find a Circle ((x,y,r)) that has maximum number of points 'on' it; given a set of points(x,y) in a 2D plane
To fix the issue you can do As a starting point, the simple O(N3) solution is to find the circle corresponding to each unique triple of points, while counting the number of occurrences of each circle you find.If a circle has N points on it, then you
TAG : algorithm
Date : October 19 2020, 06:10 AM , By : AverageJoeWang
Find Top K Frequent Words In A Big Word Stream
will help you You can use trie. And store number of occurrences so far.The following tree corresponds to the following input:
TAG : algorithm
Date : October 18 2020, 06:10 AM , By : Nanda
Can we make the counting sort algorithm for n element with O(n) space complexity?
Hope this helps If we use an array for counting in counting sort then it requires space equal to the difference between the maximum and minimum key values. We can use hash-table, then we can reduce space complexity to linear relative to the number of
TAG : algorithm
Date : October 17 2020, 06:10 PM , By : A Patel
How to find Nth Armstrong number in less than O(n) time complexity?
this one helps. This may not be optimal solution, but As per this article,
TAG : algorithm
Date : October 14 2020, 06:10 PM , By : Kian
Given a random int generator [0-5], generate [0-7]
it fixes the issue So this was an interview question.
TAG : algorithm
Date : October 14 2020, 04:00 AM , By : Danny Aspinwall
How to Hash Value in Flutter Using SHA256?
will be helpful for those in need Hashing Value (String or Int OR etc...) in Flutter Heading , Import (Crypto) :
TAG : algorithm
Date : October 14 2020, 01:00 AM , By : Ritu
Picking out exacly one value from each row and column of a matrix
Hope that helps This is the problem of finding a maximum cardinality matching in a bipartite graph: the rows represent one set of vertices u_1, u_2, ..., u_N, the columns the other set v_1, v_2, ..., v_N, and there is an edge u_i -- v_j whenever ther
TAG : algorithm
Date : October 14 2020, 12:00 AM , By : Mohammed Idrees Ahme
Why is the given algorithm O(n^2)?
This might help you The outer loop iterates from 0 to N-1.The inner loop iterates from N down to i+1.
TAG : algorithm
Date : October 14 2020, 12:00 AM , By : Michael
How can I determine if a list of ranges covers a given range?
may help you . Since you will repeatedly call Continuous on the same set of ranges, it's a good idea to create a Condense method (or whatever you wish to call it) that will take a slice and return a new slice with the ranges sorted and any overlappin
TAG : algorithm
Date : October 13 2020, 04:00 PM , By : Om Dev Yadav
Divide two strings to form palindrome
To fix the issue you can do Here is a possible solution considering that we cut the 2 strings in a common point. It runs in linear time w.r.t the string length, so in O(n).
TAG : algorithm
Date : October 13 2020, 03:00 PM , By : Anwar Mostafa
How to partition 2D-points into intervals (using only vertical lines)?
seems to work fine Here is an idea based on dynamic programming.With the following notations: (x_1, y_1), ..., (x_n, y_n) the points, with x_1
TAG : algorithm
Date : October 13 2020, 03:00 PM , By : Sung Il Cho
Algorithm to traverse k nodes of an undirected, weighted graph (and return to the origin) at the lowest cost
Hope that helps Since your problem includes the TSP for k=n as a special case in general it will be NP-complete. For small k you can adapt the dynamic programming solution of Bellmann (1962) to solve it in time O(2^k n^3).Let T(u,S) be the length of
TAG : algorithm
Date : October 13 2020, 01:00 PM , By : S. Gordon
Arranging the number 1 in a 2d matrix
I wish this helpful for you Hint: one possible solution utilizes Maximum Flow Problem by creating a special graph and running the standard maximum flow algorithm on it.If you're not familiar with the above problem, you may start reading about it e.g.
TAG : algorithm
Date : October 13 2020, 06:00 AM , By : Kazza
If a function is called more than million times in a second, print an error
Hope that helps If you get 900K calls in 0.1 seconds, and then the counter gets reset by timer, and then you get another 900K calls in 0.1 seconds, then you will have gotten 1.8M calls in a second, but you will fail to print an error.I would do somet
TAG : algorithm
Date : October 13 2020, 02:00 AM , By : MikeyMac
Find missing permutation
I hope this helps . You could try something like this: use your first 119 queries to query the first element of each "block", i.e. the 0th, 5th, 10th, etc. element count how often you find each letter, and where; there should be 24 permutations for e
TAG : algorithm
Date : October 12 2020, 11:00 PM , By : Paul Connor
What is the time complexity of the following method?
hope this fix your issue The algorithm loops until m reaches 0. In each iteration m is either halved (if it was even) or reduced by 1 (if it was odd). If the algorithm would just halve m in each iteration, then this would take log(m) steps (in the co
TAG : algorithm
Date : October 12 2020, 09:00 PM , By : 夏立顺
How to get the K smallest Products from pairs from two sorted Arrays?
I wish did fix the issue. Instead of using the heap, try to generate products in the sorted order.Imagine an n*m grid formed by indices into the respective arrays. At any given point of time the grid is partitioned into the "inspected" and "not yet i
TAG : algorithm
Date : October 12 2020, 07:00 PM , By : Quentin
divide and conquer algorithm for finding a 3-colored triangle in an undirected graph with the following properties?
it should still fix some issue It can be done in O(E*V) without using the partition property. Start by deleting all edges with the same color on both vertexes, this can be done in O(E). In the modified graph G', every triangle is a 3-colored triangle
TAG : algorithm
Date : October 12 2020, 03:00 PM , By : Zick