11 votes

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Construct this point
caird coinheringaahin g's user avatar
6 votes

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Display integer in balanced base-ϕ Objective Given a positive integer, display it in balanced base-ϕ numeral. ϕ is the golden ratio. Balanced base-ϕ Unlike the usual base-ϕ that uses 0 and 1 as digits,...
Dannyu NDos's user avatar
  • 5,941
6 votes

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Find the largest sum such that no two elements are touching
bsoelch's user avatar
  • 6,015
6 votes

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Print the answer before a given answer
Rydwolf Programs's user avatar
6 votes

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Minimum Escaping open-ended-function Your task is to write 2 functions/programs. They may share code. The first function must, given a string and a character, output a new string that does not contain ...
mousetail's user avatar
  • 12.5k
5 votes

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Meccano construct a 17-gon I recently read an interesting manuscript: Gerard ’t Hooft, Meccano Math I (2006) I will summarize the key bits here and then present a bit of a challenge. Meccano bars are ...
Wheat Wizard's user avatar
  • 98.5k
5 votes

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Sum of a range of a sum of a range of a sum of a range of a sum of a range of a sum of...
The Empty String Photographer's user avatar
5 votes

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Compute the convolution of two strings
bsoelch's user avatar
  • 6,015
5 votes

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Output an inversely proportional sequence Inspired by Wheat Wizard's comment on my previous challenge. While that challenge requires having the ratio of consecutive integers grow arbitrarily large, ...
emanresu A's user avatar
  • 37.7k
4 votes

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Reversed squares Given an integer n, your task is to determine whether it is a perfect square that when reversed,, is still a perfect square. You may assume n is always positive. When numbers such as ...
Larry Bagel's user avatar
  • 4,163
4 votes

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Numbers that can be negated by reading backwards
bsoelch's user avatar
  • 6,015
4 votes

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Continuously Count Consecutive Cases
Jacob Creutzfeldt's user avatar
4 votes

Sandbox for Proposed Challenges

Is this ordering total? Given a matrix like this: [ 0 -1 -1] [ 1 0 -1] [ 1 1 0] Determine if it represents a proper total ordering. A ordering is total if: ...
mousetail's user avatar
  • 12.5k
4 votes

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Assembly capture-the-flag KotH king-of-the-hill machine-code In this KotH, you'll write a program in a custom machine code (or using one of a few provided languages that compile into it) which tries ...
Rydwolf Programs's user avatar
4 votes

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Repeat your program to print Fibonacci numbers [tag:code-challenge][tag:source-layout]
mousetail's user avatar
  • 12.5k
4 votes

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Be big more often
The Empty String Photographer's user avatar
4 votes

Sandbox for Proposed Challenges

There's more than one way to do it cops-and-robbers Cops: Pick a freely available programming language, and pick a function on the integers (i.e. given one integer as input, it produces one integer as ...
DLosc's user avatar
  • 39.2k
4 votes

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The Legend of Koth Episode 1: WANTED Alright. The WumpusWars project turned out to be more than I can swallow, so I had to give it up. If you're interested in hosting the competition yourself go ahead:...
Shiran Yuan's user avatar
4 votes

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Decrypt an autokey cipher
SquareFinder's user avatar
4 votes

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Write a set as a union of ranges
emanresu A's user avatar
  • 37.7k
4 votes

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Output greater than without the previous character
noodle man's user avatar
  • 6,843
4 votes

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Complement an infinite list
emanresu A's user avatar
  • 37.7k
4 votes

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Help, I can't bloody well memorize this number!
leo848's user avatar
  • 637
4 votes

Sandbox for Proposed Challenges

The too-short urinal problem
noodle man's user avatar
  • 6,843
4 votes

Sandbox for Proposed Challenges

Golf Transmission As in, the 5 speed transmission from the original VW Golf GTI. Print the transmission pattern in as few bytes as possible. ...
pacman256's user avatar
  • 3,750
4 votes

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English Golf Your challenge is to golf some English text by replacing some words with their contractions. Here is a list of the contractions you need to support: Words Contraction are not aren't ...
Neil's user avatar
  • 170k
4 votes

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Derive an MIU string The MU puzzle in Douglas Hofstadter's Gödel, Escher, Bach involves a simple formal system called "MIU". It works as follows: MI is ...
Neil's user avatar
  • 170k
4 votes

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Classify a Coxeter group In this challenge you will take as input a Coxeter matrix representing a Coxeter system. Your program will then classify it as one of the following: Spherical Euclidean ...
Wheat Wizard's user avatar
  • 98.5k
4 votes

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Construct the Constructability sequence
caird coinheringaahin g's user avatar

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