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Questions tagged [restricted-source]

Imposes a restriction on the source code used to solve the challenge, for example, having no numbers in the source code.

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3 votes
9 answers
2k views

nimi ale lon toki pona! (Every word in Toki Pona!)

"nimi ale lon toki pona" is a song by YouTuber jan Misali which lists 137 common words in the constructed language Toki Pona. This challenge is not a duplicate of "How high can you ...
3-1-4-One-Five's user avatar
0 votes
15 answers
696 views

Smallest integer \$n\$ such that \$\frac{\sqrt{\log_2{n}}}{(\log_2 {\log_2 n})^2} > 1\$

Write code that outputs the smallest integer \$n > 5\$ such that \$\frac{\sqrt{\log_2{n}}}{(\log_2 {\log_2 n})^2} > 1\$. Your code may have at most one digit in its source code. You can use ...
Simd's user avatar
  • 2,926
7 votes
1 answer
292 views

Literate Programming in Base 26

Your task is to convert non-empty strings - between strings using the 26 letters, and programs, which are strings of bytes, where each byte has 256 possible values. You should use the same codepage ...
Command Master's user avatar
5 votes
9 answers
1k views

Print the banned characters based on the most common characters

This is an answer-chaining post, so in this challenge every answer (except the first answer) depends on the previous answer. The goal of this challenge is to output the restricted characters. The ...
Fmbalbuena's user avatar
  • 3,847
6 votes
0 answers
265 views

Shortest CSS selector to select ALL html elements, without using asterisk *

What is the shortest selector (by character count) to select ALL html elements on a web page, without using asterisk (*)? Some examples are the following: ...
user3163495's user avatar
21 votes
8 answers
3k views

Do you win a Numeric Mahjong?

Background Numeric Mahjong is a hypothetical variation of Japanese Mahjong, played with nonnegative integers instead of Mahjong tiles. Given a list of nonnegative integers, it is a winning hand if it ...
Bubbler's user avatar
  • 76.8k
8 votes
8 answers
650 views

Magic OEIS formulae (Robbers' thread)

This is the robbers' thread. See the cops' thread here. In this cops and robbers challenge, the cops will be tasked with writing an algorithm that computes some function of their choice, while the ...
dingledooper's user avatar
  • 22.7k
12 votes
9 answers
758 views

Magic OEIS formulae (Cops' thread)

This is the cops' thread. See the robbers' thread here. In this cops and robbers challenge, the cops will be tasked with writing an algorithm that computes some function of their choice, while the ...
dingledooper's user avatar
  • 22.7k
-9 votes
10 answers
350 views

Wrt "Hello World" prgrm bt wth n vwls

Create A "Hello, World!" program but without any vowels. Winner is the program with the least bytes. Rules: No vowels are allowed in the code. Must print to STDOUT Must be a full program. ...
Wallace's user avatar
  • 123
16 votes
7 answers
2k views

Output a Latin square with a program which is a Latin square

A Latin square of order n is text which is arranged as a square of n lines by n columns, contains n different characters, and each character appears once in each line and column. For example, here is ...
anatolyg's user avatar
  • 13.7k
-11 votes
13 answers
363 views

Check if my input was 'hi whats up' without using any of those letters in your code

Write a script, program or function which takes one input of type string and outputs or returns some sort of indication wether the input string was 'hi whats up' (without the apostrophes) or not. You ...
Squareoot's user avatar
  • 145
-12 votes
8 answers
524 views

Write "tut-tut-tut" without using "tut"

Following this question: Tut-tut-tut-tut-tut Write a program that writes "tut-tut-tut" without using the characters "t", "u" or "-" in the code itself. This is ...
JuanCa's user avatar
  • 187
23 votes
4 answers
1k views

Gray coded Gray code convertor

To increase data safety at our company, we are planning to start using Gray code numbers (where successive values differ by only one bit) instead of classical binary ones. Please help us to make a ...
Jiří's user avatar
  • 1,885
-12 votes
5 answers
370 views

12 with no 1234567890, but polyglot

This is my 12th question, so I thought of this idea. Goal: Output 12, with any preceding or trailing whitespace permitted In as many languages as possible (where different versions or flags count as ...
Number Basher's user avatar
10 votes
13 answers
3k views

Robbers: Smallest subset of characters required for Turing Completeness

This is the robbers' challenge. The cops' one is here. In Fewest (distinct) characters for Turing Completeness, the goal is to find the minimum number of characters which make a language Turing ...
Rydwolf Programs's user avatar
29 votes
31 answers
8k views

Smallest subset of characters required for Turing Completeness

In Fewest (distinct) characters for Turing Completeness, the goal is to find the minimum number of characters which make a language Turing Complete...in other words, allow it to do any computation ...
Rydwolf Programs's user avatar
10 votes
8 answers
612 views

Biggest katlani noun dictionary in 400 bytes

Katlani is a constructed language being designed in chat. In this challenge, your goal is to print the largest dictionary of katlani nouns possible in 400 bytes or less. Task In 400 bytes or less, ...
Rydwolf Programs's user avatar
18 votes
52 answers
3k views

Can you give me half? (No digits) [closed]

The task is to provide code that evaluates to 0.5 numerically, i.e. the output must be recognized by your chosen language as a numeric value (Number, float, double, etc), not as a string. The catch, ...
Eliseo D'Annunzio's user avatar
4 votes
1 answer
455 views

Write a fast-growing assembly function

Synopsis Your goal is to implement the (asymptotically) fastest growing function within bounded code on a fictional CPU utilizing a quite limited, yet (probably) turing-complete instruction set. ...
univalence's user avatar
  • 1,649
33 votes
23 answers
9k views

R.E.P.A.I.R. T.H.E. K.E.Y.B.O.A.R.D

Sequel of this AWESOME challenge You, a genius tech prodigy detective, have successfully disarmed the bomb and want to break into the computer. The police found the password ...
Wasif's user avatar
  • 12.3k
7 votes
19 answers
2k views

To count the sum of all Unicode characters of a given input under an interesting constraint

Program: To count the sum of all Unicode characters of a given input. (No need to display the output. The final answer can be calculated in any base no need to convert back to hexadecimal.) Test case :...
Aatmaj's user avatar
  • 243
-4 votes
8 answers
1k views

Let's rise higher [closed]

Challenge The main objective of the challenge is pretty simple, this is an answer chaining contest, where you have to serially print numbers from 1. That means User 1's answer will print ...
Wasif's user avatar
  • 12.3k
6 votes
3 answers
290 views

Tips for restricted source in Powershell

Adapted from Tips for restricted source in Python Just like code-golf, restricted-source pushes one to exploit quirks and hidden features of the Powershell language. Now, We already have a place to ...
Wasif's user avatar
  • 12.3k
11 votes
15 answers
2k views

Alphabet printing challenge

This challenge is related Challenge Your task is to write as many programs/snippets as you can, where each one outputs/prints/ returns an alphabet. The first program must output the letter ...
Wasif's user avatar
  • 12.3k
-13 votes
24 answers
787 views

“Simple” Programming Homework

Your friend has been caught sleeping in class again! As punishment, his computer science teacher has assigned him homework, knowing that he will not be able to solve it due to not having paid any ...
user101295's user avatar
13 votes
10 answers
1k views

Autogrammatic pairs

For today's task, we have two programs, P and Q, both in the same language. Each of them receives a single-character input. If P receives character K, P says how many times K appeared in Q. (You can ...
AndrewTheCodegolfer's user avatar
-4 votes
1 answer
240 views

Python Prime Problem [duplicate]

Your challenge is to write a Python program to print all the primes (separated by whitespace) less than a given integer N with an asterisk (...
user101295's user avatar
-3 votes
34 answers
1k views

Print A-Z and their alphabet index without using 1,2,4,6

You need to print A-Z like this: ...
user avatar
24 votes
11 answers
3k views

Pangram "Hello, World!"

Your challenge: The code must print "Hello, World!" and nothing else. Your restrictions: Your program must satisfy these requirements: The program must be a pangram. It must use every ...
Hyperbole's user avatar
  • 343
70 votes
170 answers
16k views

Print 0 to 100 without 1-9 characters

Print integers 0 to 100 (inclusive) without using characters 123456789 in your code. Separator of numbers can be comma or white space (by default <blank>, <...
user avatar
27 votes
71 answers
6k views

1, 2, miss a few, 99, 100

When I was a kid, there was a "really cool" shortcut to count to 100: 1, 2, miss a few, 99, 100 Output the exact string above, in the fewest characters ...
rybo111's user avatar
  • 4,557
12 votes
5 answers
370 views

Tips for restricted source in zsh

Adapted from tips for restricted-source in Python Just like code-golf, restricted-source pushes one to exploit quirks and hidden features of the zsh language. While we already have a place to collect ...
pxeger's user avatar
  • 23.8k
-10 votes
5 answers
600 views

Print your username by ONLY using the characters in your username [closed]

You have to print out your username, by only using the characters in your username. Standard loopholes are forbidden This is not code-golf, so shortest does not win Don't modify your username please ...
Wasif's user avatar
  • 12.3k
4 votes
5 answers
637 views

Largest Error Message in 100 bytes [duplicate]

The goal is to raise the error message with the most bytes! The error message may not be generated by the program itself, such as Python's raise. errors that do not ...
someone's user avatar
  • 339
35 votes
21 answers
4k views

Which answer did this user write?

EDIT (Jan 19, 2022, 18:00 UTC): This challenge is now over. The winner is Citty with this Pyth answer. Congratulations! This is an answer-chaining challenge where each answer must take an integer \$N\...
Arnauld's user avatar
  • 193k
27 votes
70 answers
3k views

Quickly! Group together!

As of 27/12/20, the challenge is over as no new answers were posted on the 26th. With an astounding 55 points (and 21 answers), the winner is pppery! A quick shout out to the top 5 scorers as well: ...
caird coinheringaahin g's user avatar
120 votes
19 answers
64k views

"Hello, World!" in zero lines of code

NPM's sloc is a moderately popular tool for counting source lines of code in a file. The tool will attempt to strip out both single and multiline comments and count the remaining lines in order to get ...
Sisyphus's user avatar
  • 14.8k
11 votes
25 answers
1k views

Almost Illegal Strings, Mark II (Robbers)

This is the robbers' thread for 'Almost Illegal Strings'. See the cop's thread for information on participating. A section from the post is included here for convenience. The Robbers' Challenge Find ...
Sisyphus's user avatar
  • 14.8k
24 votes
27 answers
2k views

Almost Illegal Strings, Mark II (Cops)

Edit 2020-11-06: This challenge has been edited with new provisions to encourage participation. The edits have been bolded for emphasis. Welcome to a cops and robbers version of Find an Illegal ...
Sisyphus's user avatar
  • 14.8k
7 votes
22 answers
2k views

Output all of printable ASCII using all of printable ASCII

Output all 95 bytes from 0x20 to 0x7E inclusive (printable ASCII including space), in any order, each at least once. The source ...
pxeger's user avatar
  • 23.8k
17 votes
3 answers
742 views

Tips for restricted source in Haskell

I tested the waters on this sort of question with python, but now I get to the real question I want to ask. restricted-source challenges are uniquely rewarding in Haskell because of Haskell's strict ...
Wheat Wizard's user avatar
  • 98.8k
5 votes
4 answers
356 views

More Codington Crescent

Who's up for a second attempt? If you've ever listened to the radio program "I'm sorry, I haven't a clue", then you've probably heard of the game called "Mornington Crescent". For ...
lyxal's user avatar
  • 33.5k
27 votes
27 answers
4k views

Minimal maximum byte for Turing Completeness

Summary We already have a challenge for the minimal number of characters for Turing completeness. But what about the minimal maximum byte? Challenge For a language of your choice, find a subset of ...
Sisyphus's user avatar
  • 14.8k
10 votes
9 answers
790 views

Codington Crescent [duplicate]

Let's just see how this goes If you've ever listened to the radio program "I'm sorry, I haven't a clue", then you've probably heard of the game called "Mornington Crescent". For ...
lyxal's user avatar
  • 33.5k
6 votes
17 answers
911 views

Prime Challenge

CODE GOLF & Coding Challenges: In today's challenge, you'll be asked to print the following very special AND tricky AND satisfying Prime Number...! Are you golfers ready? ...
ZaMoC's user avatar
  • 24.9k
42 votes
17 answers
6k views

Tips for restricted source in Python

Just like code-golf, restricted-source pushes one to exploit quirks and hidden features of the Python language. We already have a place to collect all these tips for code-golf, those for restricted-...
Wheat Wizard's user avatar
  • 98.8k
45 votes
142 answers
12k views

Print X without X (robber's thread)

This is the robber's thread of a cops-and-robbers challenge. You can view the cop's thread here A pretty common beginner style question is to print some string, but, there's a catch!, you need to do ...
Wheat Wizard's user avatar
  • 98.8k
73 votes
155 answers
14k views

Print X without X (cop's thread)

This is the cop's thread of a cops-and-robbers challenge. You can view the robber's thread here A pretty common beginner style question is to print some string, but there's a catch! You need to do it ...
Wheat Wizard's user avatar
  • 98.8k
18 votes
40 answers
3k views

The ASCII character countdown!

Since this is a answer-chaining challenge, you might want to sort answers by oldest. Your task is simple: Choose any printable ASCII character that's not chosen in the previous answers. And then, you ...
user avatar
17 votes
20 answers
3k views

And and… and. And.?

Introduction: Inspired by the Puzzling-stackexchange post with the same name, which I've answered four years ago: Can you create a perfectly valid English sentence, which makes perfect sense, but ...
Kevin Cruijssen's user avatar

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