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Posts tagged decision-problem

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Challenges Multiplicative perfection

Given a positive integer, indicate whether it is the product of its proper divisors. Integers equal to the product of their proper divisors can be found on the Online Encyclopedia of Integer Seque...

4 answers  ·  posted 2mo ago by trichoplax‭  ·  last activity 2mo ago by celtschk‭

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Challenges Is it stuck in a counting loop?

Given a list of non-negative integers the function $f$ replaces every integer with the number of identical integers preceding it (not necessarily contiguously). So f [1,1,2,2,1,3,3] = [1,2,1,2,3,1...

1 answer  ·  posted 12mo ago by WheatWizard‭  ·  last activity 9mo ago by isaacg‭

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Challenges Can I follow this recipe?

You work in a kitchen which has a peculiar rule. When you mix something into a pot you must always add at least one new ingredient. So you can add pasta, oil, salt then pesto, but not pasta, pesto...

1 answer  ·  posted 9mo ago by WheatWizard‭  ·  last activity 9mo ago by isaacg‭

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Challenges Is it a valid hidden word?

The Universal Crossword has a set of guidelines for crossword puzzle submissions. In this challenge we are going to be concerned with their rules for hidden word themes. A hidden word clue consis...

1 answer  ·  posted 1y ago by WheatWizard‭  ·  last activity 1y ago by Razetime‭

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Sandbox Are All Elements Equal?[FINALIZED]

posted 3y ago by Razetime‭  ·  edited 1y ago by trichoplax‭

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Challenges Chequer checker

A chequer board (also spelt "checker board" in some places) is an 8 by 8 grid of squares alternating between 2 colours. Check whether a provided pattern could be a region of a chequer board. The c...

1 answer  ·  posted 2y ago by trichoplax‭  ·  edited 2y ago by trichoplax‭

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Sandbox Chequer checker [FINALIZED]

posted 2y ago by trichoplax‭  ·  edited 2y ago by trichoplax‭

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Challenges Evens or Odds - you know this one

Get ready for a comparatively dry question - this is intended to be one of the "the"s of the code-golfing dictionary. Create a program which inputs a base 10 non-negative whole number (without lea...

16 answers  ·  posted 3y ago by AndrewTheCodegolfer‭  ·  last activity 2y ago by Olin Lathrop‭

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Challenges Are All Elements Equal?

Challenge Given a list of integers >= 0 , check if all of them are equal. Tests [1,1,1,1,1] -> true [0,1,1,6,7] -> false [1] -> true [] -> undefined(you do n...

16 answers  ·  posted 3y ago by Razetime‭  ·  last activity 2y ago by torres‭

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Challenges It's Hip to be Square

Challenge A catalogue type challenge that simply asks: Given an integer n (where n>=0) as input return a truthy value if n is a perfect square or a falsey value if not. Rules You may take...

20 answers  ·  posted 3y ago by Shaggy‭  ·  last activity 2y ago by Zakk‭