How high can you count?
Challenge:Your task is to write as many programs / functions / snippets as you can, where each one outputs / prints / returns an integer. The first program must output the integer 1, the second one 2...
View ArticleDefinite integral of polynomial functions
You will need to evaluate the definite integral (bounded by \$a\$ and \$b\$) of a certain polynomial function that takes the form of:$$\int_a^b \left( k_n x^n + k_{n-1} x^{n-1} + \cdots + k_2x^2 + k_1x...
View ArticleCode close to the challenge: Sum of integers
This is a simple challenge:Given a sequence of integers, find the sum of all integers in it.But with a twist.Your score is the Levenshtein distance between your code and the following phrase (The...
View ArticleBuild a fewest-moves freecell solver
In the game of Freecell, you are tasked with building four foundation piles in suit from ace to king, on a layout where you build downward in alternating colours. However, you can only build one card...
View ArticleI irradiate your source code, you irradiate your output
Your task is to write a program \$p\$ which outputs a string \$s\$ with the same length as \$p\$, where \$s \neq p\$.If I remove the \$n\$th byte from your program to get program \$q\$, then either...
View ArticleSay Hello to the Pioneers of Computer Science
Choose your favorite famous computer scientist or computer science pioneer who was born in 1942 or earlier (as 1943 marks the start of the creation of the 'first' computer). They should have a...
View ArticleWhat is the smallest positive base 10 integer that can be printed by a...
I think the question as above is clear, but just in case:Write a full program (not just a function) which prints a positive base 10 integer, optionally followed by a single newline.Qualifying programs...
View ArticleThe many ways to skin a `cat` [duplicate]
The well known cat command simply copies its stdin directly to stdout unchanged. But there are plenty of other commandline tools that exist...What other commands can be used to duplicate the...
View ArticleA 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). A trailing newline is permitted and...
View Article50 digits of π in HQ0-9+-INCOMPUTABLE?
BackgroundHQ0-9+-INCOMPUTABLE?! is a half-joke programming language introduced in Internet Problem Solving Contest 2011, Problem H.HQ9+ is an esoteric programming language specialized for certaintasks....
View ArticleDistinguish between Masculine and Feminine Nouns in French within 100 characters
You are to write a very small program within 100 characters. Your program must distinguish between masculine and feminine french nouns. The output should be un if it is masculine and une if it is...
View ArticleRestricted Meta-Cat
Your challenge, should you choose to accept it, is to write a program in a language of your choice that, when given a string (limited to printable ASCII) as input, outputs a new program in the same...
View ArticleOne OEIS after another
As of 13/03/2018 16:45 UTC, the winner is answer #345, by Khuldraeseth na'Barya. This means the contest is officially over, but feel free to continue posting answers, just so long as they follow the...
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Paint Starry Night, objectively, in 1kB of code
Note: a 1000 point bounty is still available for this challenge, which I will create and award if anyone takes the top score without using built-in compression.Below is a 386x320 png representation of...
View ArticleThe alphabet in programming languages
Our task is to, for each letter of the (English) alphabet, write a program that prints the alphabet, in a language whose name starts with that...
View ArticleLargest Number Printable
Your goal is to write a program that prints a number. The bigger the number, the more points you'll get. But be careful! Code length is both limited and heavily weighted in the scoring function. Your...
View ArticleFewest (distinct) characters for Turing Completeness
Summary:For any given language, what is the smallest amount of unique characters for your language to be Turing-Complete?Challenge:For any language of your choice, find the smallest subset of...
View ArticlePrint 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...
View ArticleMagical BF: BF code that works in two ways
ChallengeIn this challenge, we will use a language that is very similar to Brainfuck but slightly different.This variant of BF does not have any input and output commands; instead, it simply takes a...
View ArticleConvert maximum values to bit widths
BackgroundThe newest version of the C standard, C23, adds preprocessor macros like INT_WIDTH, ULONG_WIDTH, and SIZE_WIDTH that tell you the bit width of various integer types (here, int, unsigned long,...
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Without using numbers, get the highest salary you can. But don't exaggerate!
As I'm applying for some jobs whose job advert doesn't state the salary, I imagined a particularly evil interviewer that would give the candidate the possibility to decide their own salary ...by...
View Articlenimi 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 count?" or "Alphabet...
View ArticleEvening Commute Solver
I recently moved to an apartment overlooking the inner ring-road of town, and every day, a beautiful scene unfolds. The traffic lights are apparently so confusing (mostly because the Dutch are used to...
View ArticleEmoticon numbers!
(related)Your challenge is to output the highest number you can. You can output as a number or as a string. You must output something that matches the regex ^\d+$, as in only 0-9. The TwistYour source...
View ArticleGenerate the longest error message in C++
Write a short program, that would generate the longest possible error message, in a standard C++ compiler (gcc, cl.exe, icc, or clang).The score of each entry is the number of characters in the longest...
View ArticleCreate the characters you can write on a MacOS US English Keyboard (as...
IntroductionThis is a small challenge I came up with while trying to make some compact code for my younger brother to use. I don't think it's particularly interesting, but I believe it presents some...
View ArticleFastest tweetable integer factorizer
The task is to find a non-trivial factor of a composite number.Write code that finds a non-trivial factor of a composite number as quickly as possible subject to your code being no more than 140 bytes...
View ArticleBuild a working game of Tetris in Conway's Game of Life
Here is a theoretical question - one that doesn't afford an easy answer in any case, not even the trivial one.In Conway's Game of Life, there exist constructs such as the metapixel which allow the Game...
View ArticleBigNum Bakeoff Reboot
Some of you may be familiar with the BigNum Bakeoff, which ended up quite interestingly. The goal can more or less be summarized as writing a C program who's output would be the largest, under some...
View ArticleEvolution of OEIS
In this challenge, the goal is to recreate the On-Line Encyclopedia of Integer Sequences one sequence at a time. Similar to the Evolution of Hello World, each answer depends on a previous answer.Over...
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