Recent questions tagged Algorithm

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algorithm - Python interval interesction

My problem is as follows: having file with list of intervals: 1 5 2 8 9 12 20 30 And a range of 0 200 ... the input files are going to be huge. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Group Python list of lists into groups based on overlapping items

I have a list of lists and I am trying to group or cluster them based on their items. A nested list starts a new group ... ', 'IP', 'power']], ] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - How to generate an un-biased random number within an arbitrary range using the fewest bits

Because of the pigeon hole principle, you can't just use output = min + (rand() % (int)(max - min + ... consume one more. Repeat as necessary. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Given a set of intervals, find the minimum number of points that need to be placed, so that every interval has a point in it

Suppose you are given a set of intervals, with the starting time of each interval as s subscript i and the ... that is contained in it. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Efficiently identify changed fields in CSV files using c#

This turned out to be more difficult than I thought. Basically, each day a snapshot of a customer master ... uncertain. Any thoughts? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - the number of trailing zeros in a factorial of a given number - Ruby

Having a little trouble trying calculate the number of trailing zeros in a factorial of a given number. This is one of ... if x != [] end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Check if a number is rational in Python, for a given fp accuracy

I would like to know a good way of checking if a number x is a rational (two integers n,m exist ... algorithm of obtaining these two integers? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Class Scheduling to Boolean satisfiability [Polynomial-time reduction] part 2

I asked few days ago, a question about how to transform a University Class Scheduling Problem into a Boolean ... -time reduction] Final Part See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Find k rectangles so that they cover the maximum number of points

In two dimensional space, given a bunch of rectangles, every rectangle covers a number of points and there may ... to some known problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - Find the maximum interval sum in a list of real numbers

Here's an interview questions that a colleague asked for a programming position. I thought this was great for ... is a classic CS problem. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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784 views

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algorithm - Insert sorted array into binary search tree

I want to implement an algorithm that inserts sorted arrays into binary search trees but I don't want ending up ... you have any ideas? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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algorithm - find total number of (i,j) pairs in array such that i<j and a[i]>a[j]

As mentioned in the question ,need to find total number of (i,j) pairs in array such that (1) **i<j* ... lead to optimised sollution and how). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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702 views

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algorithm - String to unique integer hashing

I'm trying to develop a system that can change my string into a unique integral value, meaning say for ... Any help will be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

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algorithm - Find a missing 32bit integer among a unsorted array containing at most 4 billion ints

This is the problem described in Programming pearls. I can not understand binary search method descrbied by the ... only on sorted array! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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586 views

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algorithm - Finding the index of a given permutation

I'm reading the numbers 0, 1, ..., (N - 1) one by one in some order. My goal is to find the ... a lot with reducing the number of allocations. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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679 views

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algorithm - Incremental median computation with max memory efficiency

I have a process that generates values and that I observe. When the process terminates, I want to compute the median of ... known, 2) it's not. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

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algorithm - Mapping coordinates from plane given by normal vector to XY plane

So, I have this algorithm to calculate cross-section of 3D shape with plane given with normal vector. However, my ... to what should I do now? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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657 views

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algorithm - Number of assignments necessary to find the minimum value in an array?

Someone asked me a brainteaser, and I don't know; my knowledge slows down after amortized analysis, and ... picked from a uniform distribution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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679 views

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algorithm - Can I use arbitrary metrics to search KD-Trees?

I just finished implementing a kd-tree for doing fast nearest neighbor searches. I'm interested in playing around ... cover trees and vp-trees. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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634 views

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algorithm - How is it possible to do binary search on a singly-linked list in O(n) time?

This earlier question talks about doing binary search over a doubly-linked list in O(n) time. The algorithm in ... than a doubly-linked list? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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780 views

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algorithm - Kahan summation

Has anyone used Kahan summation in an application? When would the extra precision be useful? I hear that on some ... test this on my machine? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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770 views

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algorithm - convert bezier curve to polygonal chain?

I want to split a bezier curve into a polygonal chain with n straight lines. The number of lines being ... available to do this conversion? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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797 views

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algorithm - Knapsack with multiple bags and items having only weight

I am trying to solve this problem and I wanted to know if there are known existing algorithms / solutions to ... is not a homework problem. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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642 views

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algorithm - Optimally cutting a stick at specified locations

You have to cut a stick with length l into several pieces. Cuts have to be made at locations c1, c2, c3, ... impractical. How do I solve this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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644 views

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algorithm - Android: high quality image resizing / scaling

I need to scale down images coming from a Network stream without losing quality. I am aware of this ... ImageViewFullAuto" /> </RelativeLayout> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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730 views

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algorithm - Efficient Python Pandas Stock Beta Calculation on Many Dataframes

I have many (4000+) CSVs of stock data (Date, Open, High, Low, Close) which I import into individual ... datetime.datetime.now() - start_time)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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814 views

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algorithm - Windows Explorer sort method

I'm looking for an algorithm that sorts strings similar to the way files (and folders) are sorted in Windows ... the correct result. Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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817 views

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algorithm - determine if line segment is inside polygon

suppose we have convex polygon with vertices (v0,v1,....vn) my aim is to determine if for given point p(x ... how correct is this,please help me See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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