Questions tagged [code-golf]
Code-golf is a competition to solve a particular problem in the fewest bytes of source code.
44
questions with no upvoted or accepted answers
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votes
0answers
380 views
Compare Dowker Knotation
Dowker notation is a common way of representing mathematical knots.
Dowker notation can be derived from a knot diagram in the following way (based on the description from the wikipedium):
We will ...
13
votes
0answers
285 views
Help me prove the Four Color Theorem!
This is not just another challenge asking you to color random maps... In this challenge, you are asked to write a program that is actually used in the formal proof of the Four Color Theorem.
First I ...
12
votes
0answers
276 views
(t)h(e)(i)(r)(m)
Sometimes authors will write (s)he as a stand in for she or he and for some reason they don'...
12
votes
0answers
895 views
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. ...
11
votes
0answers
532 views
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 ...
10
votes
0answers
237 views
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 ...
10
votes
0answers
342 views
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 ...
10
votes
0answers
410 views
Don't break the bridges!
Introduction:
You are a worker, who is in charge of managing a set of bridges, connecting a square grid of "nodes":
...
9
votes
0answers
112 views
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 ...
9
votes
0answers
181 views
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 ...
9
votes
0answers
387 views
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 ...
9
votes
0answers
524 views
mini SPICE solver
SPICE is an electrical circuit simulation program originating from UC Berkeley. Your goal is to implement a minimalistic version which can solve for the nodal voltages and branch currents of a circuit ...
9
votes
0answers
500 views
Chaining autograms
Write a program that takes one integer input n and one format letter and outputs n autograms in the format This sentence contains ? "A"s, ? "B"s ... and ? "Z"s.
...
8
votes
0answers
903 views
Find a dual graph
A dual graph is defined such that for every "face" in a graph G, there is a corresponding vertex in the dual graph, and for every edge on the graph ...
8
votes
0answers
740 views
Generate Loopy puzzles
Loopy is a puzzle game from the collection of Simon Tatham. The previous link contains a javascript implementation of a Loopy puzzle generator. I suggest everybody who wants to attempt this challenge ...
8
votes
0answers
1k views
Simple chess bot
Inspired by this
Implement simple chess bot (with console or GUI) that has following features:
[Pseudo-]graphically showing the board;
Accepting user moves and making their own moves;
Playing by ...
7
votes
0answers
191 views
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 ...
7
votes
0answers
413 views
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 ...
7
votes
0answers
224 views
Find the smallest triangle encompassing the specified polygon
Input: An integer N which represents the polygon's vertices and a list of their x and y coordinates.
Expected output: The smallest difference possible between the area of the(not necessarily convex) ...
7
votes
0answers
212 views
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. ...
7
votes
0answers
336 views
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 ...
7
votes
0answers
181 views
Implement FBLint
(FB, or Functional-Basic, as found here Interpret Functional-Basic)
Task
Implement a linting program for FB, similar to JSLint for JavaScript.
Error types
Invalid identifier
Identifiers can only ...
7
votes
0answers
285 views
Generate net puzzles
An acyclical grid is a mapping of an acyclical graph (that is, a tree) where each node has no more than four edges onto a toroidal rectangular grid such that each cell of the grid is occupied by a ...
6
votes
0answers
266 views
Yet another digit insertion problem
Given a positive number \$n\$ we call another (not same as n) positive number \$m\$ good if we insert same digits in both n and m and the resulting fractional value is same.
$$m/n = m_{\text{...
6
votes
0answers
276 views
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 ...
6
votes
1answer
258 views
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 ...
6
votes
0answers
207 views
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 ...
5
votes
0answers
315 views
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 ...
5
votes
0answers
653 views
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, ...
4
votes
0answers
177 views
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 ...
4
votes
0answers
173 views
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 ...
4
votes
0answers
350 views
Find the pattern
I feel tired to do "find the pattern" exercise such as
1 2 3 4 (5)
1 2 4 8 (16)
1 2 3 5 8 (13)
Please write a program that finds the pattern for me.
Here, we ...
4
votes
0answers
327 views
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 ...
4
votes
0answers
270 views
Code Golf Pro Golfer Least Swings Calculator
Your Challenge:
For a golf Course Of Inputted 'n' length to hole where:
...
4
votes
0answers
218 views
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
...
3
votes
0answers
272 views
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 ...
3
votes
0answers
246 views
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 ...
3
votes
0answers
371 views
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 ...
2
votes
0answers
129 views
Tips for Golfing the Lambda Calculus & Friends
This includes tips for all related derivatives, as coding in these langs often primarily consists of writing the function in the lambda calculus and then compiling it down at the end.
Among others, ...
2
votes
0answers
141 views
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 ...
1
vote
0answers
115 views
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\$, ...
0
votes
0answers
256 views
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\$ ...
0
votes
0answers
180 views
Mixed fractions without delimiters
Help! I printed a bunch of rational numbers with no spaces or other delimiters other than the / in the fractions. There is, however, good news! All the numbers are ...
-2
votes
1answer
179 views
Compare array of decimal sum of Integers and exact fractional part
Develop a program which takes two arrays of decimal numbers, and compare the sum of whole numbers only and the decimal part. If the sums of the whole numbers are the same, and the decimal parts of ...
