A popularity-contest is a competition where the answer with the highest vote tally (upvotes minus downvotes) wins.
3
votes
3answers
100 views
Correlation Coefficient of Words [closed]
This is going to be relatively quick...
Challenge
Given a lower-case word as input, calculate the Pearson's Correlation Coefficient between the letter position of the word (nth letter within the ...
1
vote
0answers
140 views
Generate groups for in-class work
In a smallish class, some lectures are set aside for working in groups. The instructors don't want people to group themselves together with the same people every time; instead, they create the groups ...
27
votes
5answers
917 views
Patch the Paragraph
In the spirit of Patch the Image, here's a similar challenge but with text.
Challenge
Bit rot has afflicted your precious text! Given a paragraph composed of ASCII characters, with a rectangular ...
0
votes
1answer
148 views
Meta Obfuscate a String [closed]
There are numerous reasons for trying to obfuscate input. These include preventing decompiling, and being a nuiscance.
With this in mind your challenge should your choose to accept it is to write a ...
40
votes
3answers
1k views
Computer Generated Cracked Soil
Write a program that takes in an integer from 0 to 65535 (216-1) and generates a unique 500×500 pixel image that looks as similar as possible to these 6 real life images of cracked soil:
...
0
votes
12answers
939 views
Proving you are the best StackExchange-User [closed]
Write two programs/functions:
The shortest possible that returns a truthy value if given your Stack Exchange username.
An obfuscated one (as explained below) that does the same thing.
Rules for ...
32
votes
0answers
3k views
Deep learning Fizzbuzz [closed]
Inspired by the job-interview with Joel Grus, the goal of this challenge is to write a tensorflow (or other deep/machine learning) program that learns Fizzbuzz and correctly prints out the answers to ...
-2
votes
1answer
175 views
Ponderous primality testing [closed]
One of my favorite algorithms was posted on Stack Overflow as an answer to What is the fastest way to generate prime number recursively?. In pseudocode:
Nathan's algorithm
bool isPrime(int n):
...
3
votes
1answer
301 views
What time is it again? [closed]
The Inspiration
The Challenge
I'm tired of seeing the same old-same old clock in my top-right-hand corner of my screen. It's time for a new clock. While the clock clock sated my lack of interesting ...
83
votes
9answers
3k views
Patch the Image
In a popular image editing software there is a feature, that patches (The term used in image processing is inpainting as @mınxomaτ pointed out.) a selected area of an image, based on the information ...
1
vote
2answers
211 views
Find the line guaranteed by Sylvester-Gallai
The Sylvester-Gallai theorem says: Suppose you have a finite list of points in the plane. Suppose further that not all of those points are collinear (lie in a single line). Then there is some line ...
-7
votes
2answers
182 views
Unique multiplication by ten [closed]
People, it's a popularity contest, you have to do somthing cool here.
Think about cool ways of breaking the code in most languages, not about validating for everyting!
Initially this challenge ...
51
votes
6answers
1k views
Paint by Numbers (using programming, not numbers)
Your task is to create a program which takes a black-and-white outlined image (example images are below) and fills it in with colour. It is up to you how you section off each region and which colour ...
7
votes
1answer
440 views
Make the pattern from composition notebooks [closed]
This challenge was xnor's idea, taken from Digital Trauma's challenge donation thread.
Your challenge is to write a program that, as xnor put it, "procedurally generate[s] the splotchy black-and-...
4
votes
0answers
214 views
Build an image-glitching algorithm [closed]
It's well known that corrupted JPEG files or NTSC/PAL streams will appear as distorted versions of the true images, or versions covered in random-looking blocks of pixels.
Consider the below image (...
