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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 Operation "Find The Operator"

Challenge Make a program that takes input of 3 non-negative integers: a result and 2 other values that once calculated results to the 3rd value. The program must figure out how to get the 2 fir...

5 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by radarek‭

Question code-golf math number
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Challenges Diagonalized alphabet

Task Print the following: ABDFHJLNPRTVXZ CABDFHJLNPRTVX ECABDFHJLNPRTV GECABDFHJLNPRT IGECABDFHJLNPR KIGECABDFHJLNP MKIGECABDFHJLN OMKIGECABDFHJL QOMKIGECABDFHJ SQOMKIGECABDFH USQOMKIGE...

7 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by radarek‭

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Challenges Evaluate a single variable polynomial equation

Challenge Given a list of n numbers and x, compute $a + bx^1 + cx^{2} + ... + zx^{n-1}$, where a is the first value in the list, b is the second, etc. n is at most 256 and at least 0. The input va...

20 answers  ·  posted 2y ago by moony‭  ·  last activity 1y ago by south‭

Question code-golf math
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Challenges Given the preorder and the inorder of a tree, output the postorder

Definitions A binary tree is either a null (leaf), or an object (node). A node contains a value (non-negative integer) and two pointers (left and right) to two separate binary trees. A binary tre...

2 answers  ·  posted 2y ago by Hakerh400‭  ·  last activity 1y ago by radarek‭

Question code-golf
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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...

8 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by radarek‭

Question code-golf math
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Challenges Prime Difference

Given an integer n, output the smallest prime such that the difference between it and the next prime is at least n. For example, if n=5, you would output 23, since the next prime is 29, and 29-23&...

8 answers  ·  posted 2y ago by Quintec‭  ·  last activity 1y ago by radarek‭

Question code-golf
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Challenges Weave Strings Together

Given a list of strings(and optionally, their length) as input, weave the strings together. Intro Your goal is to mimic the WV operator in Pip. Take a list of strings and alternate between their ...

13 answers  ·  posted 2y ago by Razetime‭  ·  last activity 1y ago by radarek‭

Question code-golf string
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Challenges Merge two strings

Challenge Given two strings a and b, return the shortest string s so that s starts with a and ends with b. (Inspired by https://chat.stackexchange.com/transcript/message/57816868#57816868 ) Exam...

8 answers  ·  posted 2y ago by rak1507‭  ·  last activity 1y ago by radarek‭

Question code-golf
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Challenges Coat of Many Colours

Challenge Given a list of unique colour names as input, sort them in the order that they first appear in Joseph's Amazing Technicolour Dreamcoat. Example Input: green, blue, red, brown Outpu...

6 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by radarek‭

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Challenges Repeat the characters

Given a string and a non-negative integer $n$, output a new string in which each character is repeated $n$ times. Test cases: "abc", 1 -&gt; "abc" "Hello", 0 -&gt; "" "double", 2 -&gt; "ddo...

14 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by south‭

Question code-golf string
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Challenges Make my number a set

Natural to set (set meaning an unordered collection with no duplicates, though answers may use and output lists instead) Recently I was brainstorming what a language with only (arbitrarily nested...

10 answers  ·  posted 2y ago by Wezl‭  ·  last activity 1y ago by radarek‭

Question code-golf number
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Challenges Digit Sum Integer Sequence (working title)

Inspired by this challenge. If anyone has any suggestions for a song title I could use for the challenge title then please leave a comment. Definition We define f(x) for a given integer as the su...

4 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by radarek‭

Question code-golf sequence
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Challenges Bytes to Segfault

Challenge Cause the currently running program to receive the SIGSEGV signal (on Linux or other *nix systems) as fast as possible. What it does with the signal doesn't matter as long as it receives...

10 answers  ·  posted 2y ago by moony‭  ·  last activity 1y ago by radarek‭

Question code-golf *nix
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Challenges Generalized Sort

Challenge We all know and love the generic sort function, right? However, it only sorts based off one criterion - what if we want more? That's where you come in. Your task is to sort an array bas...

6 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by radarek‭

Question code-golf sorting
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Challenges Golf golf challenge

The task is to create a program which displays a golf score as text. It takes 2 numbers as input, separated by space or new line: The first number is the par of the specific hole. The second nu...

5 answers  ·  posted 1y ago by Lundin‭  ·  last activity 1y ago by radarek‭

Question code-golf
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Challenges 1, 2, Fizz, 4, Buzz!

The task Output the first 100 elements of the infamous FizzBuzz sequence. How? The FizzBuzz sequence is the sequence of decimal integers from 1 to 100 inclusive, but: If the integer is divisi...

20 answers  ·  posted 2y ago by Dion‭  ·  last activity 1y ago by celtschk‭

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Challenges Implement Rule 110

[Rule 110] is a Turing complete cellular automaton. It is defined as follows: Take as initial value a sequence of symbols that's infinite to both sides, which consists only of two different symbol...

1 answer  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

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Challenges Tips for golfing in C

C is a language I use most apart from Python and as someone who likes code golf challenges, what tips are there to golf in C?

4 answers  ·  posted 1y ago by General Sebast1an‭  ·  edited 1y ago by General Sebast1an‭

Question code-golf tips
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Challenges Tiny Turing-completeness

Your challenge today is to golf a program to interpret something Turing-complete. You may use any Turing-complete system for this so long as it is not the source language of the challenge - even a...

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

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Challenges Tips for golfing in Java

This is a list of golfing tips for the language known as Java. If you have a tip, add it in!

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

Question code-golf tips
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Challenges 99 Shortened Bottles of Beer

Disclaimer This challenge also exists in CGCC, but if you want to compete here (too), then hop in! Challenge Recreate "99 Bottles of Beer on the Wall", using the least bytes possible. Lyrics: ...

13 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

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Challenges Caesar shift cipher

Introduction What is the Caesar shift cipher (ROT$n$)? It's basically a cipher sequence that changes a letter's value from the number chosen. If we use ROT1 on "games", we get "hbnft". The basic i...

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  edited 1y ago by General Sebast1an‭

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Challenges Run-length encode a byte sequence

Run-length encoding is a simple compression technique which compresses sequences of repeating identical bytes. The encoding rules for this task are as follows: Any sequence of $n$ identical bytes...

2 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

Question code-golf encoding
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Challenges Convert integer to English

Given a non-negative integer up to $999\,999\,999$, write it in English. The input number can be in any form other than English (though you'll typically want to use the native integer type of your...

3 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

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Challenges Find good coalitions

As you might know, there were elections in Germany, and now the parties have to form a government coalition. Let's help them with it! A good coalition has the strict majority of seats (that is, mo...

2 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

Question code-golf
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Challenges Truthify an array

Jelly has an atom called untruth, which when given indices, creates an array with 1s at those places: [2,4] → [0,1,0,1]. You are required to perform the inverse of this. Given a 2D boolean array, ...

10 answers  ·  posted 2y ago by Razetime‭  ·  last activity 1y ago by General Sebast1an‭

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Challenges Obligatory Quine Challenge

Rules Using your language of choice, golf a quine. A quine is a non-empty computer program which takes no input and produces a copy of its own source code as its only output. No cheating -- ...

9 answers  ·  posted 2y ago by ATaco‭  ·  last activity 1y ago by General Sebast1an‭

Question code-golf quine
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Challenges Encode and decode floating point integers

Imagine you have only one byte (8 bits) to store a value, but need to store values from $0$ to $4032$. Impossible, until you are also told that an error of 1/64 of the exact value does not matter. ...

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

Question code-golf number
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Challenges Tips for golfing in Python

If you have any tips for golfing in Python, add them as answers to this post.

18 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by General Sebast1an‭

Question code-golf tips
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Challenges Define a mathematical expression in English

Background Inspired by this challenge that is also a mathematical English translator. Challenge Write a program that translates a mathematical expression using English with the following specifi...

1 answer  ·  posted 1y ago by General Sebast1an‭  ·  edited 1y ago by General Sebast1an‭

Question code-golf math string
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Challenges Recreate the Stack Overflow logo

Originally from Somewhere Else. I thought I'd continue making more drawing challenges here now that I discovered it. Make the Stack Overflow logo using the following criteria: The tray: ...

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

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Challenges The Ludic Numbers

The Ludic Numbers are a sequence that pops up when you apply the sieve of eratosthenes to the natural numbers, completely removing the numbers every iteration. Here is how they are generated: The...

3 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by General Sebast1an‭

Question code-golf sequence
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Challenges Decode periodic decimal fractions

Rational numbers in decimal representation can have an infinite periodic part. One common way to write this down is to repeat the periodic digits and then add three dots. Numbers without those thre...

2 answers  ·  posted 1y ago by celtschk‭  ·  edited 1y ago by General Sebast1an‭

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Challenges Reverse your quine

Challenge Write a program that prints its reversed self. For example, if your code is foo() Then it'll output: )(oof Make sure that the quine is a valid one, as defined here: No cheatin...

4 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by celtschk‭

Question code-golf quine
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Challenges Expand a polynomial

Challenge Given the roots of a polynomial (that is, the $x$ values where the polynomial evaluates to zero), as an array of real numbers, return the polynomial's coefficients. That is, given real ...

4 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by Moshi‭

Question code-golf math
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Challenges Abbreviate everything

Challenge Make a program that takes input of a string and abbreviate it. All letters of an abbreviation are capitalized, so keep that in mind. Whitespace, numbers and non-English characters ar...

3 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Hakerh400‭

Question code-golf string
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Challenges Tips for golfing in Ruby

If you have any tips for golfing in Ruby, share them as answers to this post.

1 answer  ·  posted 1y ago by snail_‭  ·  last activity 1y ago by snail_‭

Question code-golf tips
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Challenges Create an Alphabet Diamond

Challenge Output the following text: A ABA ABCBA ABCDCBA ABCDEDCBA ...

11 answers  ·  posted 2y ago by dzaima‭  ·  last activity 1y ago by General Sebast1an‭

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Challenges Tips in golfing using PHP

This is a list of golfing tips for the language known as Philippine Peso PHP. If you have a tip, add it in!

5 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

Question code-golf tips
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Challenges Getting perfect squares, differently

Create a program that gets all perfect squares starting from 0 or 1 without using any methods of multiplication (repetitive addition) and exponentiation (repetitive multiplication). Output them for...

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

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Challenges When The Ternary Is Balance

Inspired by this Rosetta Code article. Introduction Balanced Ternary is a method of representing integers using -1, 0 and 1 in base 3. Decimal 11 = (1 * 32) + (1 * 31) + (−1 * 30) = [1,1,-1] or ...

3 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by Moshi‭

Question code-golf number base
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Challenges Tips in golfing using Lua

Lua's not really used much in golfing, so it'd be pretty cool to learn some golfing tricks when making answers using it. What golfing tips are there for Lua?

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

Question code-golf tips
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Challenges My house is destroyed! Can you make me one?

Background A House of I I went on an adventure Grabbed resources and making deeds Like start to work on the materials To build the shelter I need It was a marvelous one At least in the eyes ...

10 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Quintec‭

Question code-golf string
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Challenges In The Jailhouse Now

Challenge Given an integer n&gt;=4 as input create an ASCII art "prison door"* measuring n-1 characters wide and n characters high, using the symbols from the example below. Example ╔╦╗ ╠╬╣ ...

6 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by snail_‭

Question code-golf ascii-art
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Challenges Tile pyramids on top of each other!

The task Given a positive integer as input, output tiled pyramids of this height. How? Let's say the inputted integer was n. From there, we output n lines of output, each having: A decreasing...

9 answers  ·  posted 2y ago by Dion‭  ·  last activity 1y ago by A username‭

Question code-golf ascii-art
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Challenges Multiply two strings

Given two strings, I define their product as follows: If any of the two strings is empty, the product is the empty string. If the second string consists of a single character, the result ...

6 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Hakerh400‭

Question code-golf string
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Challenges Generate Lewis Caroll's Jabberwocky

The task is to generate the text of Lewis Caroll's Jabberwocky. The text, quoted from Wikipedia, is as follows (I've replaced a non-ASCII character with ASCII, otherwise it's direct copy&amp;paste...

4 answers  ·  posted 2y ago by celtschk‭  ·  last activity 1y ago by General Sebast1an‭

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Challenges Beaver Code Decryption

Credit This challenge is taken with permission from https://www.mysterytwisterc3.org/en/challenges/level-1/beaver-code Description The encryption method is as follows: The plaintext is divided ...

6 answers  ·  posted 2y ago by rak1507‭  ·  last activity 1y ago by Shaggy‭

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Challenges Ratio limits of fibonacci-like series

Definition $F_{n}\left(0\right)=0$ $F_{n}\left(1\right)=1$ $F_{n}\left(x\right)=n\cdot F_{n}\left(x-1\right)+F_{n}\left(x-2\right)$ For example: $F_{1}=\left[0,1,1,2,3,5,8,13,21,34,55,89...\ri...

3 answers  ·  posted 2y ago by rak1507‭  ·  edited 1y ago by General Sebast1an‭

Question code-golf sequence
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+2 −0
Challenges How to add lots of command line arguments to https://tio.run?

I have a question about everyone's favourite Code Golf editor https://tio.run. After picking a language, is there a sensible way to enter command line arguments to it, other than adding them manual...

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

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