Questions tagged [kolmogorov-complexity]
Kolmogorov complexity, informally, is the amount of code it takes to describe or produce a constant object, such as a string or image. When posting a challenge in this category, please make sure it adds something new to existing challenges.
666
questions
5
votes
60
answers
3k
views
String analyser
Use any programming language to display "AWSALILAND" in such a way, so that each letter is in a new line and repeated as many times as its position in the English alphabet. For example letter, (A) ...
- 1,109
37
votes
53
answers
9k
views
List all possible titles for the Anno games
In the Anno video game series there are 6 games with a 7th one announced for early 2019. Their titles always feature a year in a specific pattern:
...
- 25.2k
19
votes
35
answers
3k
views
Text compression
With the given text below, there are some words in the text that repeats several times in the text. Use any programming language to write a short code that compresses the text to display it. Or in ...
- 1,109
23
votes
67
answers
6k
views
Display numbers lacking 2's
Display numbers from one to one-hundred (in increasing order), but number 2 shouldn’t appear anywhere in the sequence. So, for example, the numbers two (2) or ...
- 1,109
7
votes
45
answers
2k
views
Letters challenge
Using the word “conemon” print each character 2 times more than the last. The first letter, “c”, should be printed 10 times, the second 12 and so on. Each repeated-letter-string should be printed on a ...
- 1,109
13
votes
33
answers
4k
views
True color code
True color (24-bit) at Wikipedia is described in pertinent part as
24 bits almost always uses 8 bits of each of R, G, B. As of 2018
24-bit color depth is used by virtually every computer and ...
27
votes
29
answers
5k
views
Output a Sudoku board
Today's challenge is simple: Without taking any input, output any valid sudoku board.
In case you are unfamiliar with sudoku, Wikipedia describes what a valid board should look like:
The objective ...
- 57.4k
40
votes
38
answers
6k
views
21
votes
8
answers
2k
views
Belarus rushnyk
We've got quite a few national flag challenges already:
AU
CH
FI
FR
GB
GB
IS
KR
NP
US...
Here's another, somewhat more advanced one:
Return or print the decorative pattern from Belarus's national ...
- 14.9k
14
votes
33
answers
2k
views
35
votes
66
answers
10k
views
Generate a deck of cards
Here's an array representing a standard deck of cards, including two Jokers.
...
- 11.3k
0
votes
13
answers
630
views
Beginners 10x10 multiplication matrix [duplicate]
I was looking for a very easy task to look how short of a code can be produced on a beginners exercise.
The goal is to produce a simple table that looks like this common java/c# code is about 4 lines....
- 119
25
votes
56
answers
3k
views
Orthodiagonal steps
It's a common problem to navigate in a 2D matrix. We've seen it many times and will see again. So let's help future us and develop the shortest solutions to generate all eight possible steps in a 2D ...
- 3,336
1
vote
0
answers
106
views
Golf a bit-reversal table [duplicate]
The Premise:
You are writing a C driver for a screen for use on an embedded system. The screen uses a tortured version of SPI that requires data to be sent LSb (least-significant-bit) first, but MSB (...
25
votes
34
answers
4k
views
You must construct ASCII Pylons!
Cross posted from my anagolf post (note: may contain spoilers, post mortem).
Output the following text exactly.
You may have additional trailing whitespace on each line, and trailing newlines as ...
- 39.1k
25
votes
4
answers
526
views
Race Around the Track
I'm looking to find the fastest racer around. Show me your fastest lap around this 18x14 track shown below.
...
- 913
10
votes
15
answers
2k
views
find the pattern in this number sequence of 1's and 0's
Write the shortest program or function which generates these 1000 numbers or a sequence (0- or 1-indexed) which begins with them.
...
- 219
9
votes
9
answers
673
views
99 Varieties of Dosa
99 Varieties of Dosa is a popular chain of roadside dosa stalls across South India. This is inspired by a combination of this chain and the classic CodeGolf challenge "99 Bottles of Beer".
Recreate ...
- 133
4
votes
6
answers
892
views
-1
votes
5
answers
307
views
Yet another "draw a box" Question [duplicate]
The following problem is a common interview question, thus dull answers are discouraged. Go short or creative, best if both:
Create the following pattern
...
- 147
21
votes
9
answers
2k
views
Fizz Buzz with unique characters in columns
Inspired by Digits in their lanes and 1, 2, Fizz, 4, Buzz
Introduction
Your task is to generate exactly the following output:
...
- 3,577
21
votes
42
answers
4k
views
The next colour
Challenge
Consider the rainbow as seven colours, represented by strings as Red Orange Yellow Green Blue Indigo Violet.
Your task is to create a program that ...
- 846
30
votes
47
answers
4k
views
Which Card is it?
Introduction
Long ago, when I used to code card games with usual playing cards, I used to specify a number for each card and call a function with some number to get a card. This somewhat inspired me ...
- 4,940
5
votes
3
answers
637
views
Make a hammer animation
The goal is to make a two frame animation with ASCII art of a hammer smacking a table.
Trailing white-space is allowed and the frames need to repeat continuously. The program should iterate over both ...
user78881
18
votes
15
answers
2k
views
33
votes
5
answers
2k
views
Left Hand vs. Right Hand — Typists Challenge
Your task is to pit each side of the keyboard against each other and build two programs, in the same language, one using only keys on the left-hand side of a standard keyboard that outputs ...
- 22.6k
36
votes
33
answers
9k
views
Create a Magic 8 Ball
As a child, my friend had a magic 8 ball that we would ask questions to and see what the fate of that question was.
Challenge
Your challenge is to write a program (or function) that when run (or ...
- 1,465
37
votes
39
answers
4k
views
Hast Thou Slain the Jabberwock?
Your task is to output the exact string
The Jabberwocky
without taking input. Normal rules for input and output apply, so both functions and programs are ...
- 90.4k
10
votes
5
answers
415
views
Continued Fraction of Digit-wise Sum of Square Roots
Introduction
Your task is to generate the first 1000 terms in the continued fraction representation of digit-wise sum of square root of 2 and square root of 3.
In other words, produce exactly the ...
- 3,577
-5
votes
6
answers
348
views
Print the numbers -1, 0, 1
This is a very simple challenge, and it is to print the numbers -1, 0, and 1.
The following ...
- 467
29
votes
14
answers
8k
views
Print "Hey Jude" from The Beatles
Your task is to write a program which prints following four verses extracted from the lyrics from The Beatles' song "Hey Jude" (© Sony/ATV Music Publishing LLC):
...
- 793
39
votes
45
answers
7k
views
Kolmogorov shifter
Output or display the following three lines of text, exactly as they are shown below. A trailing newline is accepted.
...
- 45.1k
13
votes
4
answers
815
views
A Zealous "Quick Brown Fox" "Jumped" Along the Groovy Spiral
Introduction
Write a program to output the outgoing spiral of the famous pangram following given rules.
Challenge
A pangram is a sentence using every letter of a given alphabet at least once. One ...
- 3,577
44
votes
10
answers
6k
views
Falcon Heavy stages
Choose a set of four bytes without replacement (i.e. no byte repeated), and not necessarily in any particular order, from any one of the following four sets:
The characters of any one single-byte ...
- 28.4k
72
votes
200
answers
17k
views
The Programming Language Quiz, Mark II - Cops
A repost of this challenge. Meta discussion. Sandbox post. Body of the question similar to the original
Robber's challenge
This cops and robbers is now (08/03/2018) closed to further competing cop ...
- 48.2k
11
votes
13
answers
2k
views
List all palindromic prime dates between 0000-01-01 and 99999-12-31
You know what a palindrome, a prime and a date are.
Your task is to list all dates in 100 thousands of years that fulfill
all three characteristics.
Nevermind anything but the numbers, use the ...
- 1,796
25
votes
49
answers
2k
views
Confusing Alphabet Staircase
Given no input, output this interesting alphabet pattern in either case (the case has to be consistent) via an accepted output method:
A
AB
ACBC
ADBDCD
AEBECEDE
AFBFCFDFEF
AGBGCGDGEGFG
AHBHCHDHEHFHGH
...
- 1,524
25
votes
24
answers
4k
views
Traffic direction
Rules
Given an ISO3166-1-Alpha-2 country code your task is to decide on the traffic direction for that country:
Input will be a valid country code (valid as in it's an element of the two lists ...
- 16.5k
6
votes
10
answers
565
views
Print the alphabet Christmas tree [duplicate]
I know it's 1.5 weeks after Christmas but trying to print an isosceles triangle in a monospaced font makes it look weird.
Challenge
Print the alphabet from A to Z so that it forms a filled triangle ...
- 3,503
42
votes
44
answers
3k
views
A Programming Puzzle of Mode Golf
Your task is to print the text Good morning, Green orb!, with every character repeated in place as many times as the most frequent byte in your source (the mode). ...
- 90.4k
1
vote
31
answers
854
views
Exponential-ish number sequence
Your program must print out this exact sequence:
1
2
4
10
24
54
116
242
496
1006
2028
4074
8168
16358
32740
65506
131040
262110
NOPE!
As usual, shortest program ...
- 9,791
22
votes
3
answers
653
views
Draw an ASCII key signature
Given an input of a note, output an ASCII drawing of the corresponding major
key on the treble clef.
Here are all the major keys (that don't include double-sharps or double-flats)
and their ...
- 70.6k
19
votes
17
answers
3k
views
Mirrored Digital Clock
Many digital clocks display the time using simplified digits comprised of only seven different lights that are either on or off:
When mirrored horizontally, the digits ...
- 16.2k
42
votes
83
answers
4k
views
A very long Terza Rima
Description
Output the rhyme scheme for a very long Terza Rima.
Input
None.
Output
...
- 3,847
17
votes
97
answers
5k
views
Output the language name times the number of characters [closed]
Challenge:
Your task is to use any language to output that language's name times the number of character's in its name.
Use the common name or acronym of the language.
If there are
multiple versions ...
- 739
21
votes
11
answers
3k
views
Unicode Fractions
Given a fraction in the format m/n (where m and n are coprime integers), output the corresponding Unicode fraction. Your program/function will not be expected to ...
- 2,753
13
votes
21
answers
2k
views
Iterated phi sequence
Related: Iterated phi(n) function.
Your challenge is to compute the iterated phi function:
f(n) = number of iterations of φ for n to reach 1.
Where ...
- 2,389
20
votes
11
answers
2k
views
Print me a scale
Oh no! I have a theory test soon and I don't remember the scales yet! Help me remember my major scales by printing the following:
...
- 2,273
8
votes
14
answers
3k
views
Coffee Machine Machine
You left your computer for too long, and it went to sleep. Wake it up again by printing the following coffee maker.
...
- 3,576
13
votes
24
answers
2k
views
Scoop me an icecream please
Make me an icecream cone please
We have a ton of great ice cream places here in New England. Most of them are closed for the winter now, so...
...
- 3,450