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Challenges

Posts tagged code-golf

Code golf is a winning criterion, where users seek to solve the challenge in as few bytes of source code as possible.

This tag doesn't have a detailed wiki yet.

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Challenges Prove commutativity on this monoid presentation.

Given two binary strings $A$ and $B$ such that $A$ is an anagram of $B$, output a third binary string $S$ such that both $A$ and $B$ can be created by iterated removals of the substring $10101$ fro...

0 answers  ·  posted 8mo ago by WheatWizard‭

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Challenges Calculate the Z-array

Task Given a list of numbers $X$ produce a second list of numbers $Y$ such that $Y_i$ is the length of the longest common prefix of $X$ and $X$ with the first $i$ elements removed. For example if...

1 answer  ·  posted 8mo ago by WheatWizard‭  ·  last activity 8mo ago by TheCodidacter, or rather ACodidacter‭

Question code-golf list array
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Challenges Cumulative Counts

Challenge Given an array of numbers return the cumulative count of each item. This is the number of times an item has occurred so far. Examples [1,1,2,2,2,1,1,1,3,3] -> [1,2,1,2,3,3,4,5,1,2]...

19 answers  ·  posted 3y ago by rak1507‭  ·  last activity 8mo ago by WheatWizard‭

Question code-golf
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Challenges Build a replacement ball in regex.

In this challenge you will take a number $n$ and a string $X$ of length $\geq n$, and produce a regular expression which matches all strings that are withing $n$ character substitutions of $X$. Sp...

3 answers  ·  posted 8mo ago by WheatWizard‭  ·  last activity 8mo ago by WheatWizard‭

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Challenges Are these reduced forms of the same thing?

Task You are going to take three strings as input $A$, $B$ and $X$. And your goal is to determine if there exists a third string $S$ such that both $A$ and $B$ can be formed by iteratively removin...

0 answers  ·  posted 8mo ago by WheatWizard‭  ·  edited 8mo ago by WheatWizard‭

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Challenges Efficient censorship

You are a low-level censor working for the Ministry of Media Accuracy. Part of your job is to make sure that certain words don't appear in publications. Every morning you get a fresh stack of next...

4 answers  ·  posted 8mo ago by WheatWizard‭  ·  last activity 8mo ago by Shaggy‭

Question code-golf string
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Challenges Connect the corners without 4 in a row

Connect opposite corners of a rectangle of characters without putting 4 characters in a row. Input Two numbers, W and H, representing the width and height of the rectangle Each number will be ...

1 answer  ·  posted 1y ago by trichoplax‭  ·  last activity 8mo ago by WheatWizard‭

Question code-golf
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Sandbox Evaluate a univariate polynomial [FINALIZED]

posted 3y ago by moony‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Write a Deadfish Interpreter[FINALIZED]

posted 3y ago by Razetime‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Add two negabinary integers [FINALIZED]

posted 2y ago by Moshi‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Are All Elements Equal?[FINALIZED]

posted 2y ago by Razetime‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Multiply two strings [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Repeat the characters [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox The Ludic Numbers[FINALIZED]

posted 2y ago by Razetime‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Convert integer to English [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Find good coalitions [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Run-length encode a byte sequence [FINALIZED]

posted 3y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Implement Rule 110 [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Golf golf challenge [FINALIZED]

posted 2y ago by Lundin‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Find the IP address class [FINALIZED]

posted 2y ago by Razetime‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Keyword golfing [FINALIZED]

posted 2y ago by Lundin‭  ·  edited 8mo ago by trichoplax‭

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Sandbox Looping counter [FINALIZED]

posted 2y ago by celtschk‭  ·  edited 8mo ago by trichoplax‭

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Sandbox The Camelot Wheel [FINALIZED]

posted 3y ago by Quintec‭  ·  edited 8mo ago by trichoplax‭

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Challenges Determine if a polyomino is "prime"

An $n$-polyomino is a connected subset of the square tiling consisting of $n$ squares. We will not require that polyominos be simply connected, that is they can have holes. We will say a $n$-polyo...

1 answer  ·  posted 9mo ago by WheatWizard‭  ·  edited 8mo ago by WheatWizard‭

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Challenges Count polyomino bisections

An polyomino is a non-empty connected subset of the square tiling consisting of squares joined along their edges. We will not require that polyominos be simply connected, that is they can have hole...

0 answers  ·  posted 8mo ago by WheatWizard‭

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Sandbox Label the hinged tetrominoes - [FINALIZED]

posted 8mo ago by trichoplax‭  ·  edited 8mo ago by trichoplax‭

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Challenges Compute the determinant

Challenge A simple challenge: Given a two-dimensional matrix (an array of arrays) of real numbers, compute the determinant. The determinant of a matrix is a mathematical construct used in many ap...

9 answers  ·  posted 2y ago by Moshi‭  ·  last activity 11mo ago by aspen138‭

Question code-golf math
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Sandbox Bird is the word

posted 2y ago by Lundin‭  ·  edited 12mo ago by General Sebast1an‭

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Challenges 8 coexisting queens

This is a fixed output challenge. Output a textual representation of a chessboard hosting 8 queens, none of which are attacking each other. There are 92 ways of arranging them, 12 if rotations and...

5 answers  ·  posted 1y ago by trichoplax‭  ·  last activity 1y ago by m90‭

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Challenges Mediocre pop count

Given a sequence of letters, omit those with the highest or lowest pop count. Terminology The pop count or population count of a binary string is the number of 1s in it. For this challenge, the ...

6 answers  ·  posted 1y ago by trichoplax‭  ·  last activity 1y ago by A username‭

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Challenges Encode with ROT13.5

Given a string, convert all of its letters using ROT13, and all of its digits using ROT5. This is sometimes referred to as ROT13.5. Input A sequence of printable ASCII characters (character cod...

4 answers  ·  posted 1y ago by trichoplax‭  ·  last activity 1y ago by Razetime‭

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Challenges Digit antitranspose

Convert a matrix or grid of digits to its antitranspose. For a square matrix , this is its reflection in its antidiagonal. More generally, for a rectangular matrix, this is its reflection in its sk...

4 answers  ·  posted 1y ago by trichoplax‭  ·  last activity 1y ago by torres‭

Question code-golf number
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Sandbox Digit antitranspose [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Sandbox Encode with ROT13.5 [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Challenges Just the vowels please

Given a sequence of letters, output only the vowels. Input A sequence of letters This may be a string or any ordered data structure of characters (provided it is consistent between inputs) Th...

9 answers  ·  posted 1y ago by trichoplax‭  ·  last activity 1y ago by taoh‭

Question code-golf alphabet
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Sandbox Sort letters by height [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Sandbox Connect the corners without 4 in a row [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Challenges Circle of text characters

Given a radius R, output a text representation of a circle. Input A positive integer R (strictly greater than zero) You do not need to handle values of R greater than 32 Output A square ...

0 answers  ·  posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

Question code-golf string
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Sandbox Circle of text characters [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Sandbox Pinwheel ​words [FINALIZED]

posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

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Challenges Pinwheel ​words

Given a word that can be rotated by 180 degrees (a half turn) about at least one of its 3 axes and continue to be composed of English alphabet letters, output one of its rotated forms. The 3 rotat...

0 answers  ·  posted 1y ago by trichoplax‭

Question code-golf alphabet
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Challenges Balanced quinary quasiquine

Given an integer $N$ in balanced quinary, output the first $N$ characters of your source code if $N$ is positive, or the last $-N$ characters of your source code if $N$ is negative. Terminology ...

1 answer  ·  posted 1y ago by trichoplax‭  ·  edited 1y ago by trichoplax‭

Question code-golf quine base
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Challenges "Hello, {name}!"

Background While we do have a "Hello, World!" challenge, we still don't have one regarding input. So let's do one! Challenge Create a program that takes an input (not as a function argument) the...

16 answers  ·  posted 2y ago by General Sebast1an‭  ·  last activity 1y ago by south‭

Question code-golf string