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.
331
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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 ...
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11
answers
303
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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 ...
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8
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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 ...
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20
votes
4
answers
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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 ...
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5
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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 ...
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10
votes
13
answers
2k
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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 ...
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27
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31
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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 ...
- 18.2k
10
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8
answers
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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, ...
- 18.2k
18
votes
52
answers
3k
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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, ...
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votes
1
answer
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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.
...
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23
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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 ...
- 12.2k
7
votes
19
answers
1k
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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 :...
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8
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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 ...
- 12.2k
6
votes
3
answers
266
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 ...
- 12.2k
11
votes
15
answers
2k
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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 ...
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votes
24
answers
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“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 ...
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10
answers
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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 ...
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votes
1
answer
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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 (...
- 455
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votes
32
answers
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Print A-Z and their alphabet index without using 1,2,4,6
You need to print A-Z like this:
...
user101144
23
votes
11
answers
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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 ...
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63
votes
153
answers
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Print 0 to 100 without 1-9 characters
Print 0 to 100 without using characters 1,2,3,4,5,6,7,8,9 in your code.
Seperator of numbers can be comma, whitespace or newline.
Shortest code wins.
user101144
27
votes
66
answers
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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 ...
- 4,537
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votes
5
answers
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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 ...
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5
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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
...
- 12.2k
4
votes
5
answers
527
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 ...
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35
votes
21
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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\...
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votes
70
answers
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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:
...
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117
votes
19
answers
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"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 ...
- 13.7k
11
votes
25
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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 ...
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votes
27
answers
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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 ...
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7
votes
22
answers
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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 ...
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17
votes
3
answers
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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 ...
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5
votes
4
answers
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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 ...
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votes
26
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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 ...
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10
votes
9
answers
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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 ...
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6
votes
17
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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?
...
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17
answers
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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-...
- 93.8k
45
votes
142
answers
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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 ...
- 93.8k
73
votes
155
answers
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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 ...
- 93.8k
18
votes
40
answers
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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 ...
user92069
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votes
20
answers
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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 ...
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Get string "-" with JavaScript using only the symbols from "+[]"
Challenge: Get the JavaScript string value containing only the "-" character using code only containing the following three symbols: ...
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32
answers
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A rainbow of identity functions
Closely related: How high can you count?
Challenge
In your programming language of choice, write as many different identity programs/functions as possible, under the following constraints:
Each ...
- 69.9k
56
votes
36
answers
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Conway's Monster
This challenge is in honor of mathematician John Conway who passed away April 11, 2020 due to COVID-19. He was famous for coming up with the Game of Life cellular automaton and many other mathematical ...
- 88.6k
12
votes
22
answers
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Sum in 2540 sums
This is my attempt to pair code-shuffleboard with code-golf.
You need to write a full program or function that sums all codepoints of the input string. If there is no input, you can output any number,...
user92069
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votes
15
answers
509
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Let's start with a brainy quote
The challenge today is to write a program that outputs a known proverb, Where there is a will, there is a way., that means if someone is determined to do something, ...
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62
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Triangular code, triangular output
For this challenge, submissions should be a program or function shaped like a right triangle, which produces a right triangle of the same size.
What is a right triangle?
For this challenge, a right ...
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votes
42
answers
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Hello ASCII World!
Construct a full program which outputs Hello, World!. The score of your submission will be equal to the sum of all of the ASCII values of the distinct characters. ...
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votes
44
answers
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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
...
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votes
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Ah, why is there a bug in my program?
This challenge is inspired by @LuisMendo's MATL answer to my "binary multiples" challenge.
Task
Pick a code-golf challenge that is open and that has been posted before this one; let me call it the "...
- 13.9k