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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.

7 votes
1 answer
164 views

Fitch Proof of \$(p\Longrightarrow q)\iff\lnot p\lor q\$ with least amount of steps

In the smallest amount of steps, prove $$(p\Longrightarrow q)\iff\lnot p\lor q$$ We base the proof system on this website. The related functionalities are: Assumption. Assume that some statement is ...
Sny's user avatar
  • 529
7 votes
6 answers
2k views

Bring back cup stacking

Do you remember cup stacking? Young competitors compete to see how quickly they can arrange 12 upside-down plastic cups into three consecutive arrangements of cup pyramids. The number of each cups in ...
Steve Bennett's user avatar
15 votes
7 answers
1k views

Draw all 11 cube nets

There are 11 ways of flattening a cube onto a flat surface, like a piece of paper, which can then be folded back up into a cube. Each of these is called a cube net. Your task is to write a program or ...
Steve Bennett's user avatar
14 votes
19 answers
2k views

Antiparallel 12-hour Clock Hands

Output (or print) each of the 11 times, one per line, in the POSIX %I:%M:%S format, at which the hour and minute hands of a 12-hour clock are antiparallel. Here <...
Ray Toal's user avatar
  • 801
3 votes
2 answers
443 views

9 Queens and 1 obstacle

Position 9 queens and 1 obstacle on an 8×8 chessboard so that no two queens threaten each other. Obstacles between two queens prevent them from threatening each other. For example here is a solution (<...
l4m2's user avatar
  • 30.6k
12 votes
7 answers
2k views

Do Not Find the Fox in all possible ways

Do Not Find the Fox is a non-game where you repeat the following up to 16 times: Pick an empty square in a 4×4 grid Draw a tile from a bag – there are 5 Fs, 6 Os and 5 Xs at first – and place it in ...
Parcly Taxel's user avatar
  • 4,391
27 votes
22 answers
5k views

Draw the Flag of Greenland

The flag of Greenland consists of two red sections and two white sections. I'll provide a diagram below, but also give a textual description. The background of the flag is a rectangle that is 18 units ...
Bbrk24's user avatar
  • 3,733
9 votes
13 answers
1k views

BTD6 Kinetic Chaos (9/26/24 Odyssey)

This week's odyssey in Bloons Tower Defense 6 has a neat gimmick, but it's slightly confusing at first. Each custom round is actually two consecutive regular rounds at once, but this means the round ...
pacman256's user avatar
  • 4,808
8 votes
10 answers
3k views

Five Hundred Cigarettes

This is a cigarette. _ // // // ° This is two (2) cigarettes. __ /// /// /// °° This is three (3) cigarettes. The ...
ConnieMnemonic's user avatar
9 votes
7 answers
3k views

Waiting girl's face

In June 2023, at Xenium Party 2023, a 4KB intro created by Wacek, Luke, and Jammer for the Commodore 64 was presented, featuring the face of a waiting girl. The task is to write the shortest possible ...
Kamil Kiełczewski's user avatar
24 votes
10 answers
3k views

Play the Final Fantasy Prelude

Play the initial section of the Final Fantasy Prelude. This is a 4-octave up-down arpeggio of the following chords: Cadd2, Amadd2, Cadd2, Amadd2, Fadd2, Gadd2, G♯maj7, A♯maj7 Rules: Actual sound must ...
G. Sliepen's user avatar
  • 1,291
11 votes
4 answers
739 views

Miracle Miracle Octad Generator Generator

The Miracle Octad Generator (MOG) introduced by R. T. Curtis in 1976 is a central tool in the study of sporadic groups, error-correcting codes, Steiner systems, and sphere-packings. The MOG is ...
aeh5040's user avatar
  • 1,954
10 votes
17 answers
1k views

Is it an option for the ls utility specified in POSIX.1-2017?

The ls utility lists specified directory content. It is infamous for stupidly lots of options which is known for anti-pattern design of implementing software.(...
鳴神裁四点一号's user avatar
23 votes
7 answers
1k views

Output the Steiner system S(5,8,24)

Output 759 "rows", each of which consists of 8 distinct integers in the range 0,1,...,23, with the property that every set of 5 integers in the range 0,1,...,23 is contained in exactly one ...
aeh5040's user avatar
  • 1,954
10 votes
14 answers
822 views

Looping counter extended

The looping counter is a challenge that prints an infinite number of lines. The first line has one *, the next line has one more ...
None1's user avatar
  • 1,155

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