Questions tagged [algorithm]
An algorithm is a sequence of well-defined steps that define an abstract solution to a problem. Use this tag when your issue is related to algorithm design.
5,125 questions
1
vote
3
answers
22
views
How can I optimize this solution to avoid TLE in LeetCode?
I am working on this LeetCode problem where I have to count the minimum number of operations to make all elements in an array equal to zero 3542. Minimum Operations to Convert All Elements to Zero
...
- 119
4
votes
3
answers
449
views
A simple method for compressing white space in text (Java) - Take II
Intro
In this post, I will elaborate on A simple method for compressing white space in text (Java). Here, I have incorporated some advice offered by Chris. Also, this version preserves a single new ...
- 32.1k
2
votes
2
answers
246
views
Benchmarking in Java some super linearithmic sorting algorithms
Intro
A sort is called super linearithmic if its running time is \$\omega(N \log N)\$. For example, \$f(N) = \omega(g(N))\$ means that \$f(N)\$ grows "faster" than \$g(N)\$. In this post, I ...
- 32.1k
5
votes
1
answer
516
views
A simple method for compressing white space in text (Java)
(The story continues in A simple method for compressing white space in text (Java) - Take II.)
Intro
Now I have that text space compressor. For example,
...
- 32.1k
2
votes
1
answer
133
views
ShannonFanoEncoder.java - computing prefix codes in Java
Intro
This time, I have implemented the Shannon-Fano coding.
Code
io.github.coderodde.compression.ShannonFanoEncoder.java
...
- 32.1k
1
vote
1
answer
98
views
Jump point search in Java for faster pathfinding in grid mazes
(Refer to the entire repository in GitHub.)
How it looks like
Intro
This time, I present my take on Jump point search that I translated from Javascript (PathFinding.js/src/finders/JumpPointFinderBase....
- 32.1k
4
votes
2
answers
504
views
Finding a sequence of xors to change a to b
I'm resolving a problem from CodeForces: C. Beautiful XOR. This is what the code is supposed to do:
You have two numbers a and b.
You must transform a into b using XOR operations (...
- 119
5
votes
2
answers
362
views
BRESort - Bitwise Relationship Extraction - Intelligent Adaptive Sorting Engine for 32/64-bit & Floating-Point Data
I want to begin by sincerely thanking the community for the invaluable feedback on my previous BRESort byte-sorting research. Your insights about enums, named constants, loop optimizations, and test ...
- 121
4
votes
1
answer
89
views
Dijkstra's algorithm for non-uniform undirected hypergraphs: Take II - bidirectional Dijkstra's algorithm with excellent performance
Intro
(See the full repository here.)
A non-uniform undirected hypergraph is a generalization of an undirected graph. It is defined as \$H = (X, E)\$, where \$X\$ is the set of vertices and \$E \...
- 32.1k
7
votes
4
answers
669
views
My BRESort adaptive sorting engine in C
I've created BRESort - an adaptive sorting engine that dynamically selects
optimal algorithms based on data patterns. It achieves 3.6-4.2x speedup over stdlib qsort ...
- 121
0
votes
1
answer
80
views
Computing loan cuts leading to a global zero equity in a financial graph (Java)
Intro
I won't specify the problem here, but instead, provide the link to the blog post discussing the problem and the full implementation.
Code
...
- 32.1k
4
votes
2
answers
140
views
Dijkstra's algorithm for non-uniform undirected hypergraphs
Intro
(Repo here.)
A non-uniform undirected hypergraph is a generalization of an undirected graph. It is defined as \$H = (X, E)\$, where \$X\$ is the set of vertices and \$E \subseteq \mathcal{P}(X)\$...
- 32.1k
5
votes
5
answers
1k
views
Check whether a binary tree is symmetric
I implemented a recursive solution that compares the left and right subtree in mirrored fashion. It works for my test cases, but I would like to know if there are any best practices that would make ...
- 119
8
votes
2
answers
301
views
Implementation of a kd-tree header-only library
I've took inspiration from https://www.geeksforgeeks.org/cpp/kd-trees-in-cpp/ and implemented a kdtree library and I would like to get a review of it. The main target was to have a kd-tree ...
- 370
5
votes
2
answers
418
views
Ordinary insertion sort vs. straight insertion sort in Java (benchmark)
Intro
So this time I wanted to find out which of the two insertion sort flavours are faster:
Code
io.github.coderodde.util.StraightInsertionSort.java:
...
- 32.1k