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Interleavable programs (WIP) code-challenge source-layout Your task in this challenge is to create programs that can be interleaved. Submissions will be in the form of collections of programs. The ...
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Erverse Hte Ifrst Wto Eltters fo Aech Owrd code-golf Inspired by this accidental misspelling If you could read the title, then you already know what the challenge is about. If not, then I'll tell ...
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Is this a squashed series? code-golf string parsing number decision-problem Given a string of digits, determine whether it is the concatenation of at least two ascending consecutive integers. (in ...
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I X the source code, you Y the output! code-golf source-layout code-generation There's a zillion challenges of the form "I [do a thing to] the source code, you [do a thing to] the output!", ...
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3 votes

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Decipher a squashed series code-golf string parsing number Given a string containing a sequence of ascending consecutive positive integers, but with no separators (such as ...
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Change the Temperature of Swatchlings Warning: Contains Deltarune Chapter 2 Spoilers Summary Your challenge today is to determine the minimum number of turns needed to change the temperatures of an ...
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3 votes

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Word stays a word after taking away a letter This is a repost of this challenge Challenge There is an old, popular riddle: Find an English word with 8 letters that, taken away one letter, creates a ...
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1 vote

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Pairs at every distance Given a list x of 2 or more integers, output whether there exists a pair of equal integers in x ...
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Bloons TD 6 Upgrade Paths code-golf number kolmogorov-complexity The monkeys need help organizing their defense and have asked you, Benjamin the code monkey, to create a program that will list all ...
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Photosynthesis king-of-the-hill python Flavor text You, a algae spore, have recently evolved the ability to walk. However, 3 others have just done the same thing. Can you use this new ability to your ...
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code-golfmatharithmeticnumber Implement Binary Exponentiation Background In programming, there is a recursive algorithm called binary exponentiation, which allows for large integer powers to be ...
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ro1000an nu1000era50 en100o501ng
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2 votes

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Is it shuffled FizzBuzz? A twin of this. FizzBuzz is where a range of positive integers is taken, and numbers divisible by 3 are replaced with "Fizz", divisible by 5 with "Buzz" ...
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Fix my FizzBuzz
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4 votes

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Not-Roman-Numeral Addition
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Which R version is it? It's Peanuts! code-golfrstring This challenge will be based on an R language trivia: every release is named and it's a reference to Peanuts comic strips (see here and here). ...
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2 votes

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Parse this handy graph format code-golf parsing graph-theory There's a great number of ways to represent directed graphs like the following: Most representations are tailored towards being easy to ...
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Perform division for fuzzy numbers Objective Given two positive "fuzzy" numbers (as defined below), perform division between them. Definition Here, a fuzzy number consists of two integers: \$...
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2 votes

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Nest some addition There's a natural follow-up with the other possible addition operator, where the order of application is reversed, i.e. \$\operatorname{add2}\overparen{\underparen a}\overparen{\...
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6 votes

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Extract the word containing this index
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2 votes

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Flood fill by distance
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3 votes

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backwardS_hybriD-snakE_kebaB-cameL_case
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Is this a strange pond?
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2 votes

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Draw the Progress Pride flag code-golfgraphical-outputkolmogorov-complexity Challenge Create the image of a progress pride flag. Output Dimensions Rules Your program must (obviously) create the ...
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Iterative Smallest Complement
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Enumerate the Microwave Timer
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Goroawase Numeric Substitution code-golf number Goroawase numeric substitution is a common form of Japanese wordplay where homophonous words are associated with a given series of numbers to associate ...
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pattern-matching grid code-golf turn-my-swag-on Is This Loss? Given two shapes A and B in ASCII-art, determine if ...
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The Unaverageables
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Create Bernard from Desmos
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2 votes

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How far from binary?
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2 votes

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Seeing the queen's lasers In chess, the queen piece can see arbitrarily far in each cardinal and intercardinal direction. What does this mean? Well, I'll show you with an ASCII drawing: ...
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Extend a matrix in all directions
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Interpret BigTalk Talk is a language which takes a single bit of input and has four commands: 00 If the accumulator is 0, set the accumulator to 0. ...
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The prime frog 🐸 -- Integrated. From the original question, we make the following changes: The "prime frog" is a strange animal that jumps between integers*, until it arrives on 3 or 19... ...
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Don't like the middles There will be no winner on these question. Just for the fun of the challenge. Your job will be to output every sequence of each 10 numbers, alternating between the evens and ...
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1 vote

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Push some numbers Given a list of integers, apply the following rules to each element: If n is even, move it to the back. If n is odd, move it to the front. Zero is considered even. You may assume ...
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2 votes

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Find the walls!
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3 votes

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Is it a valid list?
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2 votes

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Enumerate all pure sets
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1 vote

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Truncate words in a sentence
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1 vote

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Flatten from the inside out Say we have a ragged list [ [1, 2], [3, [4, 5] ], ] And we want to flatten it by a layer, decreasing its depth by 1. We ...
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Compute the cophenetic correlation coefficient Meta question at the end. Background The cophenetic correlation coefficient is used in bioinformatic to measure how close the distances of a tree are to ...
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4 votes

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Universal Unicode Clock
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4 votes

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Give f and g that sometimes commute
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2 votes

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Is it a heapable sequence?
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4 votes

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Iteratively delete a list
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1 vote

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Gray coded gray code convertor code-golf restricted-source
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Am I winning at O-Tris? O-Tris is a very, very, very simplified version of Tetris, which is defined as follows: There is a grid of cells that is 6 cells wide and 7 cells tall, known as the Playfield. ...
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Parenthetical names Your challenge is to build a program that puts parentheses around the 'title' part of names. For example, Sonic the Hedgehog is converted to <...
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