Questions tagged [code-golf]
Code-golf is a competition to solve a particular problem in the fewest bytes of source code.
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Find a Glider Synthesis (Game of Life)
Challenge Summary
In summary, the challenge is to provide the glider synthesis for a Game of Life configuration, which is your input.
What does this mean?
Well, firstly, let me explain a few terms. ...
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Tips for Golfing in SQLite?
I was looking for this page to help me enhance my first answer with SQLite, but I couldnt find one. So here we are!
What general tips do you have for golfing in SQLite? I'm looking for ideas that can ...
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Is it a legal atomic chess move?
Background and Rules
There is a variant of chess called atomic chess, which follows essentially the same rules as normal chess, except that pieces explodes other pieces around them when captured. In ...
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Finding Radical Ideals
Sandbox
Finding radicals of arbitrary ideals in rings is hard! However, it's a doable task in polynomial rings, since they are Noetherian (all ideals are finitely generated)
Background
A quick ...
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Simulate Alpha Decay
Alpha Decay is a kind of radiation decay where every time the atom "decays", it loses a helium nucleus (an alpha particle). This means that an atom loses 2 protons and 2 neutrons each time. ...
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Lean golf: Balanced Bracket Sequence
Ungolfed, ugly, horrible proof to help you make progress on this challenge: https://gist.github.com/huynhtrankhanh/dff7036a45073735305caedc891dedf2
A bracket sequence is a string that consists of the ...
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NP-complete reduction: (grid-)Hamiltonian circuit
Background
Hamiltonian circuit problem is a decision problem which asks whether a given graph has a Hamiltonian circuit, i.e. a cycle that visits every vertex exactly once. This problem is one of the ...
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Optimize for Bgil Midol's slicing scoring
In Bgil Midol's question, the score of a sequence of slice is defined as
sumof|startslices|∗2+sumof|endslices|∗2+sumof|stepslices|∗3
Such scoring method makes multiple slices possibly take less ...
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Jelly compression quine
The golfing language Jelly has a very complex and clever string compression system which I'm not going to go into depth about here. You can find a very good explanation here.
Basically, Jelly's string ...
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Cover positions with snakes of same 'colour'
Imagine a grid where the origin square \$(0,0)\$ is at the top left of the screen, and positive \$x\$ is rightwards whereas positive \$y\$ is downwards. Coloured squares are at various positions on ...
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Radiation is Painful
A radiation-hardened quine can take a hit and stay standing, but nobody ever said that the quine can't be a wuss about it.
For this challenge, you should write a quine that:
If no characters are ...
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Tips for golfing in Chef
What general tips do you have for golfing in Chef? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Chef (e.g. "remove unnecessary ...
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Get ERC-20 token balance
Ethereum is a blockchain platform. It has its own native cryptocurrency, ether, but in this challenge, we'll be focusing on its ability to run smart contracts.
The ERC-20 standard describes an ...
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Count the length of head movement
Once upon a time I wanted to order custom tokens for a board game. They say they can do it, and then they present me their price list. I was confused because they charge per inch of head movement, and ...
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Code Golf: BlackJack - best moves
The Challenge
I was looking into small code examples for a specific language as a small tutorial and came accross a simplified Blackjack that should be implemented. In this Challenge you will have to ...
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Decompose the domain
In scientific computing, it is often desirable to decompose some large domain into smaller "subdomains", then parallelize the computation by performing the work on each subdomain in parallel and the ...
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Shortest CSS selector to select ALL html elements, without using asterisk *
What is the shortest selector (by character count) to select ALL html elements on a web page, without using asterisk (*)? Some examples are the following:
...
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Write a proof checker for first order logic
This originally came from Give the best Chaitin incompleteness bound, but I realized that there was a fragment of this problem which still potentially gives a good coding challenge.
First Order Logic ...
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Give the best Chaitin incompleteness bound
This was originally a pure mathematics question, but I think I've got the best chance for an answer here.
The Challenge
For concreteness, consider Peano Arithmetic (PA). For some language L of your ...
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Further golfing this C# code from Scramble words while preserving their outlines
I'll start off by saying I checked and checked again that this question should be on topic.
I will also clearly state that this is a tips question about further golfing a certain set of code not a ...
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Probability to win a hand of poker (Texas hold 'em)
Challenge:
In the last stage of a two players Texas hold 'em, given a two-card hand and five cards on table, determine your probability to win versus an opponent by the standard ranking of poker ...
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Simulate the isotropic non-totalistic cellular automaton
There are many generalizations of Conway's Game of Life. One of them is the isotropic non-totalistic rulespace, in which the state of a cell in the next generation depends not just on its state and ...
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Construct the suffix automaton
In computer science, a suffix automaton is the smallest partial deterministic finite automaton that recognizes the set of suffixes of a given string. (Wikipedia)
Given a string \$S\$ consisting of ...
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Another version of "The Bridge and Torch Problem"
The idea for this code golf puzzle is from link: The Bridge and Torch Problem
The inspiration for this code golf puzzle is the Bridge and Torch
problem, in which d people at the start of a bridge ...
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Tetris overlooked move counter
Playing tetris is fun. Watching an AI play tetris is also fun.
Some tetris AIs will always ignore the possibility of maneuvering a piece under an overhang, which makes me sad.
It means that the ...
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Chess Light Solver
Challenge
Write a solver for the Chess Light puzzle game, in the smallest amount of code.
The input will be a representation of a chessboard, how in yours is up to you. My examples below is textual, ...
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Convert To Shorthand Part 2
Part 1 of the challenge revolved around converting the letters into specific unicode characters.
Lore
In this part we receive the output from the function made in Part 1, which now has to be arranged ...
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Tips for golfing in Seriously
I am looking for tips to code in this golfing language Seriously, and was wondering what some of the ways for golfing this language is. "Remove comments" is not a tip. Actually is also ...
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Tips for golfing in Objective C
Although on codingame.com, Objective C and C are two of the best golfing languages there, so I would like to know some of the best golfing methods (although I am a python person, I am currently trying ...
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2017 SCRAM Finder
Background
The nuclear industry has term, SCRAM, used to describe a quick shutdown of the reactor. There's a fun myth that it stands for "Safety Control Rod Ax Man," the role which served ...
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Golfing Delayed Expansion Variables in Batch
Enabling delayed expansion variables in Batch chews up a lot of bytes. The shortest I have managed to make it is:
@!! 2>nul||cmd/q/v/c%0&&exit/b
...
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Custom Games of Life
There's a lot of questions about Conway's Game of Life, but nothing about customization (Related: 2-Player Life). Given an input, determine the result on a 100x100 grid after some iterations. The ...
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Tips for golfing in Arn
Does anyone have tips on how to golf in this language? Please one tip per answer and avoid posting simple and general tips such as "remove whitespace".
Here is the github link and here is ...
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Rope&Nail logic
Related, both rope, nail and falling, but reversed and some other differences
Consider a loop of rope hanging on n nails on a row. Given a table showing whether ...
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Tips for golfing in SageMath
SageMath is an open-source mathematics software system, built on Python 2. Its extensive math library support makes it a strong choice for golfing in math-based challenges.
What tips do you have for ...
user45941
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Code Golf Pro Golfer Least Swings Calculator
Your Challenge:
For a golf Course Of Inputted 'n' length to hole where:
...
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Create a World Cup overview
I'm not to sure about the title so feel free to suggest a better one.
Task/challenge
Create an overview for the World Cup tracking the cup from the group phase till the finals.
Group phase
There ...
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Tips for golfing in Thue
Anyone got tips for golfing in Thue. One tip per answer, and no tips aplicable to all languages (like remove comments)
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Shorten this dns txt record request script as much as possible
I have made a short script that will pull dns txt records down from a server and combine them into a single string.
DNS txt records are:
1.website.com
...
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Tips for golfing in Fennel
Fennel is a lispy language which compiles to Lua.
From its page:
Fennel is a programming language that brings together the speed, simplicity, and reach of Lua with the flexibility of a lisp syntax ...
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Smallest OCI Container That Handles PID 1 Signals Correctly
Introduction
There have been a few examples of the smallest possible OCI container that does "X". However these examples never correctly handle termination signals.
Challenge
Produce the ...
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Conic Sections (simplified)
Given the equation of a non-parabolic conic section, output its characteristics.
Spec
Some info on conic sections:
for more info visit Wikipedia
From an equation of the form \$ax^2+bx+cy^2+dy+E=0\$, ...
user100690
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FreeCell stack moving
This question is about moving stacks around in the card game FreeCell, but here it will be presented more abstractly.
Given three integers \$0\le n,m<10000,0<k<10000\$.
There are \$m+2\$ ...
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Clone GNU cat 8.32
Write a program that precisely clones GNU cat version 8.32, which is
installed on my computer.
In any case, if called with the same arguments, same stdin, and same ...
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Shape Animation
In PowerPoint, there's just one overly used feature: animations. For simplicity, that shape will be a non-rotated rectangle.
The data is specified as an array of eight integers: ...
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Tips for golfing in Zig
Not sure if I've seen this one before :/
Any tips for golfing in Zig? Please post 1 tip per answer and don't post obvious tips like "remove whitespace".
Github link
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