Linked Questions

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 <...
40
votes
55answers
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: ...
52
votes
30answers
6k views

Let's golf a BIBABOBU decoder

While I was traveling in the future, I noticed a funny game among kids circa 2275. When they don't want their great-great-great-great-grand parents to understand what they're saying, they use the ...
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 ...
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 ...
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 ...
15
votes
39answers
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\$ ...
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 ...
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 ...
16
votes
17answers
3k views

Alternating Pattern

In a now deleted stackoverflow question, someone posted the following: Write a program or function to print alternating patterns in * and ...
4
votes
38answers
968 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 ...
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 ...
18
votes
15answers
1k views

g​o​l​f​ ​a​t​a​n​2

Sometimes it really is a struggle to convert Cartesian coordinates (x,y) to Polar coordinates (r,phi). While you can calculate <...
16
votes
13answers
916 views

Running gene crossover algorithm

Your task is to accept as input two gene sequences, and a sequence of "cross over points", and return the gene sequence that results from the indicated cross overs. What I mean by this is, say you ...

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