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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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8 votes
12 answers
1k 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 ...
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22 votes
25 answers
2k 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 ...
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9 votes
8 answers
517 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, ...
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-1 votes
2 answers
201 views

Challenge: create a large number using an esoteric programming language [duplicate]

I enjoy large numbers and esoteric programming language, so I decided to combine them into a programming challenge. Your goal is to push the limits of esoteric languages like BF or Pyth and return the ...
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  • 491
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, ...
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3 votes
0 answers
306 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. ...
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  • 1,593
31 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 ...
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  • 11.9k
7 votes
19 answers
1k 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 :...
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  • 243
-3 votes
8 answers
973 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 ...
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  • 11.9k
6 votes
3 answers
246 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 ...
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  • 11.9k
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 ...
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  • 11.9k
-12 votes
24 answers
649 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 ...
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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 ...
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-3 votes
1 answer
180 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 (...
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-1 votes
31 answers
583 views

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

You need to print A-Z like this: ...
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23 votes
10 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 ...
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  • 322
57 votes
137 answers
14k views

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.
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25 votes
65 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 ...
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  • 4,507
12 votes
5 answers
281 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 ...
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  • 18.4k
-9 votes
5 answers
465 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 ...
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  • 11.9k
3 votes
5 answers
458 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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  • 319
34 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\...
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  • 166k
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: ...
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116 votes
19 answers
63k 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 ...
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  • 11.7k
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 ...
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  • 11.7k
23 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 ...
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  • 11.7k
6 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 ...
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  • 18.4k
17 votes
2 answers
681 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 ...
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  • 84.9k
5 votes
4 answers
330 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 ...
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  • 21k
26 votes
25 answers
3k 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 ...
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  • 11.7k
10 votes
9 answers
766 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 ...
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  • 21k
6 votes
16 answers
773 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? ...
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  • 23.1k
42 votes
17 answers
5k 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-...
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  • 84.9k
42 votes
141 answers
11k 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 ...
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  • 84.9k
71 votes
155 answers
13k 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 ...
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  • 84.9k
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 ...
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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 ...
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25 votes
2 answers
2k views

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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20 votes
32 answers
3k views

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 ...
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  • 62.1k
53 votes
25 answers
8k views

DON'T... do NOT lowercase UPPERCASE this!

Write a program that outputs its input unchanged. However: If all uppercase characters are removed from the program, it lowercases all uppercase letters. If all lowercase characters are removed from ...
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  • 7,781
54 votes
33 answers
8k views

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 ...
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12 votes
22 answers
2k views

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,...
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-2 votes
15 answers
500 views

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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30 votes
61 answers
3k views

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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5 votes
36 answers
1k views

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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  • 16.9k
7 votes
44 answers
1k views

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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  • 3,199
32 votes
28 answers
5k views

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 "...
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  • 13.8k
12 votes
6 answers
1k views

As close to flat as possible

Write a program or function that fulfills the following Scores less than 101 bytes under normal code-golf rules Takes no input1 and always outputs a single integer. Every integer is a possible output....
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  • 84.9k
0 votes
4 answers
699 views

Broken Keyboard

You're writing your favorite language and you want to display the following string: abcdefghijklmnopqrstuvwxyz to your happy customer. Unfortunately, your keyboard ...
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  • 1,150
14 votes
1 answer
621 views

Is everything in order?

Challenge: Input: a string, consisting of only printable ASCII characters Output: a truthy/falsey value whether its characters are in alphabetical order (based on their UTF-8 unicode values), from any ...
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