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Decomposition of a matrix in \$ SL_2(\mathbb{Z}) \$ code-golf math matrix liner-algebra
Background
The special linear group \$ SL_2(\mathbb{Z}) \$ is a multiplicative group of \$ 2 \times 2 \$ matrices whose elements are integers and determinant is 1.
It is known that every member of \$ SL_2(\...
Write a Whitespace Interpreter
code-golfwhitespace-languageinterpreterstring
Your challenge is to write an interpreter for Whitespace. Given a string consisting of spaces, tabs, newlines, and potential other characters, as well as possible inputs for the Whitespace program itself, output the re...
In LLAMA, you want to dump cards from your hand as quickly as you can, but you might not be able to play what you want.
Each player starts a round with six cards in hand; the deck consists of llama cards and cards numbered 1-6, with eight copies of each. On a turn, the active player can play a c...
Challenge
Write a program or function that converts a 32 bit binary number to its qaud-dotted decimal notation (often used for representing IPv4)
I/O examples
input --> ouput
10001011111100010111110001111110 --> 139.241.124.126
00000000000000000000000000000000 --> 0.0.0.0
01111111000000000000...
400 rep for a GNU sed solution to Fizz Buzz at less than 129 bytes
Intending to increase participation of golfing in sed, I have posted a sed solution at 129 bytes https://codegolf.stackexchange.com/a/197896/ and anyone who beats it will be awarded 400 rep.
The solution must be on GNU sed 4.2.2...
Posted from sandbox
Background
You have invented a new hashing algorithm which is equiprobable to generate a number between \$1\$ and \$n\$. To show off how good your hash function is to your friends you have decided to tell them the amount of time (measured in units of time given below) it wil...
Given two nonempty arrays of natural numbers \$a\$ and \$b\$, return the shortest nonempty array of pairs of natural numbers \$q\$ such that the sequence of first elements of \$q\$ consists of a whole number of repeated copies of \$a\$, and the sequence of second elements of \$q\$ consists of a w...
