Linked Questions

40
votes
56answers
5k views

An abundance of integers!

An Abundant number is any number where the sum of its proper divisors is greater than the original number. For example, the proper divisors of 12 are: ...
15
votes
41answers
2k views

Sum square difference

The sum of the squares of the first ten natural numbers is, \$1^2 + 2^2 + \dots + 10^2 = 385\$ The square of the sum of the first ten natural numbers is, \$(1 + 2 + ... + 10)^2 = 55^2 = 3025\$ ...
6
votes
40answers
1k views

Add N numbers without using + or -

Given N integers, output the sum of those integers. Input You may take the integers in any reasonable format, including: stdin arguments an array or list Rules ...
13
votes
18answers
1k views

Name the Aztec year

It's time for another Mesoamerican calendar! The Xiuhnelpilli was used by the Aztecs (more properly, the Mexica) to name their years. Each year has a number and a sign. Here's part of the cycle: <...
34
votes
14answers
2k views

Tips for golfing in J

GolfScript gets its own way far too often and I feel that a repository of handy hints for golfing in J might help in the fight against the evil empire. What tips do you have for making this already ...
12
votes
8answers
1k views

Bit delivery in Bin City

sandbox Story Similar to a newspaper route you have been tasked with delivering bits to the residents of Bin City. Just as certain people like certain newspapers, the citizens of Bin City prefer ...
17
votes
20answers
2k views

Pendulum Encoding

Given a string as an input (which can be any acceptable/convenient format in your language), implement pendulum encoding. The test cases are split into individual items (which aren't quoted) for a ...
15
votes
26answers
1k views

pleTriwapt Sgpin (Triplet Swapping)

Intro/Background I was looking at a Flybuys card at Coles recently and noticed that if I took something like this: Source, randomly found on the Internet And swapped some words around, I'd get ...
15
votes
21answers
2k views

The SBEVE Challenge

She said s(he) be(lie)ve(d), he said sbeve. Input A non-empty string, s. It's guaranteed that s will have only printable ASCII ...
27
votes
33answers
2k views

Rotation summation

Take a square matrix containing positive integers as input, and calculate the "rotated sum" of the matrix. Rotated sum: Take the sum of the original matrix and the same matrix rotated 90, 180 and ...
13
votes
17answers
2k views

Generate input for this hardware

I have a hardware that has a 32-bit input register. The register has the following characteristics: The 32-bit register consists of eight 4-bit fields. Each 4-bit field holds a value in signed-...
77
votes
30answers
12k views

Create an “H” from smaller “H”s

Challenge Create a function or program that, when given an integer size, does the following: If size is equal to 1, output ...
25
votes
25answers
3k views

Print the sequence

21, 21, 23, 20, 5, 25, 31, 24, ? Inspired by this Puzzle, given an integer \$n>0\$ , print out the following sequence until you reach a non-Integer (spoilered, in case you want to solve the puzzle ...
22
votes
8answers
561 views

Heightmap of Boxes

Have a look at this ascii art diagram of various boxes: ...
18
votes
51answers
3k views

The max() is not enough

Intro A friend posed this question today in a slightly different way - "Can a single [Python] command determine the largest of some integers AND that they aren't equal?". While we didn't find a way ...

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