### Communities

tag:snake search within a tag
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
created:<1w created < 1 week ago
post_type:xxxx type of post
Challenges

Code challenges of all types. For questions about golfing, bowling, etc, use Q&A. For questions about this community, use Meta. To get feedback on a challenge before posting it, use Sandbox.

121 posts ·
60%
+1 −0

Challenge Make a program that takes input of an integer that's $n &gt; 1$ and print out a staircase using a specific character for stair basing (hashes (#) for demonstration; you can use spaces,...

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by radarek‭

81%
+7 −0

Challenge Make a program that takes input of 3 non-negative integers: a result and 2 other values that once calculated results to the 3rd value. The program must figure out how to get the 2 fir...

5 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by radarek‭

77%
+5 −0

Task Print the following: ABDFHJLNPRTVXZ CABDFHJLNPRTVX ECABDFHJLNPRTV GECABDFHJLNPRT IGECABDFHJLNPR KIGECABDFHJLNP MKIGECABDFHJLN OMKIGECABDFHJL QOMKIGECABDFHJ SQOMKIGECABDFH USQOMKIGE...

7 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by radarek‭

87%
+12 −0

Challenge Given a list of n numbers and x, compute $a + bx^1 + cx^{2} + ... + zx^{n-1}$, where a is the first value in the list, b is the second, etc. n is at most 256 and at least 0. The input va...

20 answers  ·  posted 2y ago by moony‭  ·  last activity 1y ago by south‭

77%
+5 −0

Definitions A binary tree is either a null (leaf), or an object (node). A node contains a value (non-negative integer) and two pointers (left and right) to two separate binary trees. A binary tre...

2 answers  ·  posted 2y ago by Hakerh400‭  ·  last activity 1y ago by radarek‭

77%
+5 −0

Challenge A simple challenge: Given a two-dimensional matrix (an array of arrays) of real numbers, compute the determinant. The determinant of a matrix is a mathematical construct used in many ap...

8 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by radarek‭

77%
+5 −0

Given an integer n, output the smallest prime such that the difference between it and the next prime is at least n. For example, if n=5, you would output 23, since the next prime is 29, and 29-23&...

8 answers  ·  posted 2y ago by Quintec‭  ·  last activity 1y ago by radarek‭

86%
+11 −0

Given a list of strings(and optionally, their length) as input, weave the strings together. Intro Your goal is to mimic the WV operator in Pip. Take a list of strings and alternate between their ...

13 answers  ·  posted 2y ago by Razetime‭  ·  last activity 1y ago by radarek‭

86%
+11 −0

Challenge Given two strings a and b, return the shortest string s so that s starts with a and ends with b. (Inspired by https://chat.stackexchange.com/transcript/message/57816868#57816868 ) Exam...

8 answers  ·  posted 2y ago by rak1507‭  ·  last activity 1y ago by radarek‭

84%
+9 −0

Challenge Given a list of unique colour names as input, sort them in the order that they first appear in Joseph's Amazing Technicolour Dreamcoat. Example Input: green, blue, red, brown Outpu...

6 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by radarek‭

77%
+5 −0

Given a string and a non-negative integer $n$, output a new string in which each character is repeated $n$ times. Test cases: "abc", 1 -&gt; "abc" "Hello", 0 -&gt; "" "double", 2 -&gt; "ddo...

14 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by south‭

81%
+7 −0

Natural to set (set meaning an unordered collection with no duplicates, though answers may use and output lists instead) Recently I was brainstorming what a language with only (arbitrarily nested...

10 answers  ·  posted 2y ago by Wezl‭  ·  last activity 1y ago by radarek‭

75%
+4 −0

Inspired by this challenge. If anyone has any suggestions for a song title I could use for the challenge title then please leave a comment. Definition We define f(x) for a given integer as the su...

4 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by radarek‭

81%
+7 −0

Challenge Cause the currently running program to receive the SIGSEGV signal (on Linux or other *nix systems) as fast as possible. What it does with the signal doesn't matter as long as it receives...

10 answers  ·  posted 2y ago by moony‭  ·  last activity 1y ago by radarek‭

71%
+3 −0

Challenge We all know and love the generic sort function, right? However, it only sorts based off one criterion - what if we want more? That's where you come in. Your task is to sort an array bas...

6 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by radarek‭

80%
+6 −0

The task is to create a program which displays a golf score as text. It takes 2 numbers as input, separated by space or new line: The first number is the par of the specific hole. The second nu...

5 answers  ·  posted 1y ago by Lundin‭  ·  last activity 1y ago by radarek‭

84%
+9 −0

The task Output the first 100 elements of the infamous FizzBuzz sequence. How? The FizzBuzz sequence is the sequence of decimal integers from 1 to 100 inclusive, but: If the integer is divisi...

20 answers  ·  posted 2y ago by Dion‭  ·  last activity 1y ago by celtschk‭

75%
+4 −0

[Rule 110] is a Turing complete cellular automaton. It is defined as follows: Take as initial value a sequence of symbols that's infinite to both sides, which consists only of two different symbol...

1 answer  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

40%
+0 −1

Your challenge today is to golf a program to interpret something Turing-complete. You may use any Turing-complete system for this so long as it is not the source language of the challenge - even a...

0 answers  ·  posted 1y ago by AndrewTheCodegolfer‭  ·  edited 1y ago by AndrewTheCodegolfer‭

77%
+5 −0

Disclaimer This challenge also exists in CGCC, but if you want to compete here (too), then hop in! Challenge Recreate "99 Bottles of Beer on the Wall", using the least bytes possible. Lyrics: ...

13 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

75%
+4 −0

Introduction What is the Caesar shift cipher (ROT$n$)? It's basically a cipher sequence that changes a letter's value from the number chosen. If we use ROT1 on "games", we get "hbnft". The basic i...

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  edited 1y ago by General Sebast1an‭

71%
+3 −0

Run-length encoding is a simple compression technique which compresses sequences of repeating identical bytes. The encoding rules for this task are as follows: Any sequence of $n$ identical bytes...

2 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

71%
+3 −0

Given a non-negative integer up to $999\,999\,999$, write it in English. The input number can be in any form other than English (though you'll typically want to use the native integer type of your...

3 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

71%
+3 −0

As you might know, there were elections in Germany, and now the parties have to form a government coalition. Let's help them with it! A good coalition has the strict majority of seats (that is, mo...

2 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Moshi‭

81%
+7 −0

Jelly has an atom called untruth, which when given indices, creates an array with 1s at those places: [2,4] → [0,1,0,1]. You are required to perform the inverse of this. Given a 2D boolean array, ...

10 answers  ·  posted 2y ago by Razetime‭  ·  last activity 1y ago by General Sebast1an‭

84%
+9 −0

Rules Using your language of choice, golf a quine. A quine is a non-empty computer program which takes no input and produces a copy of its own source code as its only output. No cheating -- ...

9 answers  ·  posted 2y ago by ATaco‭  ·  last activity 1y ago by General Sebast1an‭

71%
+3 −0

Imagine you have only one byte (8 bits) to store a value, but need to store values from $0$ to $4032$. Impossible, until you are also told that an error of 1/64 of the exact value does not matter. ...

2 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by General Sebast1an‭

66%
+2 −0

Background Inspired by this challenge that is also a mathematical English translator. Challenge Write a program that translates a mathematical expression using English with the following specifi...

1 answer  ·  posted 1y ago by General Sebast1an‭  ·  edited 1y ago by General Sebast1an‭

77%
+5 −0

Originally from Somewhere Else. I thought I'd continue making more drawing challenges here now that I discovered it. Make the Stack Overflow logo using the following criteria: The tray: ...

2 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Anonymous‭

75%
+4 −0

The Ludic Numbers are a sequence that pops up when you apply the sieve of eratosthenes to the natural numbers, completely removing the numbers every iteration. Here is how they are generated: The...

3 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by General Sebast1an‭

77%
+5 −0

Rational numbers in decimal representation can have an infinite periodic part. One common way to write this down is to repeat the periodic digits and then add three dots. Numbers without those thre...

2 answers  ·  posted 1y ago by celtschk‭  ·  edited 1y ago by General Sebast1an‭

66%
+2 −0

Challenge Write a program that prints its reversed self. For example, if your code is foo() Then it'll output: )(oof Make sure that the quine is a valid one, as defined here: No cheatin...

4 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by celtschk‭

66%
+2 −0

Challenge Given the roots of a polynomial (that is, the $x$ values where the polynomial evaluates to zero), as an array of real numbers, return the polynomial's coefficients. That is, given real ...

4 answers  ·  posted 1y ago by Moshi‭  ·  last activity 1y ago by Moshi‭

71%
+3 −0

Challenge Make a program that takes input of a string and abbreviate it. All letters of an abbreviation are capitalized, so keep that in mind. Whitespace, numbers and non-English characters ar...

3 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Hakerh400‭

85%
+10 −0

Challenge Output the following text: A ABA ABCBA ABCDCBA ABCDEDCBA ...

11 answers  ·  posted 2y ago by dzaima‭  ·  last activity 1y ago by General Sebast1an‭

60%
+1 −0

Create a program that gets all perfect squares starting from 0 or 1 without using any methods of multiplication (repetitive addition) and exponentiation (repetitive multiplication). Output them for...

7 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by General Sebast1an‭

75%
+4 −0

Inspired by this Rosetta Code article. Introduction Balanced Ternary is a method of representing integers using -1, 0 and 1 in base 3. Decimal 11 = (1 * 32) + (1 * 31) + (−1 * 30) = [1,1,-1] or ...

3 answers  ·  posted 1y ago by Razetime‭  ·  last activity 1y ago by Moshi‭

71%
+3 −0

Background A House of I I went on an adventure Grabbed resources and making deeds Like start to work on the materials To build the shelter I need It was a marvelous one At least in the eyes ...

10 answers  ·  posted 1y ago by General Sebast1an‭  ·  last activity 1y ago by Quintec‭

88%
+13 −0

Challenge Write as many functions, programs, or snippets of code, that result in 256. Your score is the number of separate solutions submitted in an answer. The challenge? The characters used in ...

12 answers  ·  posted 2y ago by dzaima‭  ·  last activity 1y ago by snail_‭

81%
+7 −0

Challenge Given an integer n&gt;=4 as input create an ASCII art "prison door"* measuring n-1 characters wide and n characters high, using the symbols from the example below. Example ╔╦╗ ╠╬╣ ...

6 answers  ·  posted 1y ago by Shaggy‭  ·  last activity 1y ago by snail_‭

75%
+4 −0

The task Given a positive integer as input, output tiled pyramids of this height. How? Let's say the inputted integer was n. From there, we output n lines of output, each having: A decreasing...

9 answers  ·  posted 2y ago by Dion‭  ·  last activity 1y ago by A username‭

71%
+3 −0

Given two strings, I define their product as follows: If any of the two strings is empty, the product is the empty string. If the second string consists of a single character, the result ...

6 answers  ·  posted 1y ago by celtschk‭  ·  last activity 1y ago by Hakerh400‭

75%
+4 −0

The task is to generate the text of Lewis Caroll's Jabberwocky. The text, quoted from Wikipedia, is as follows (I've replaced a non-ASCII character with ASCII, otherwise it's direct copy&amp;paste...

4 answers  ·  posted 2y ago by celtschk‭  ·  last activity 1y ago by General Sebast1an‭

80%
+6 −0

Credit This challenge is taken with permission from https://www.mysterytwisterc3.org/en/challenges/level-1/beaver-code Description The encryption method is as follows: The plaintext is divided ...

6 answers  ·  posted 2y ago by rak1507‭  ·  last activity 1y ago by Shaggy‭

77%
+5 −0

Definition $F_{n}\left(0\right)=0$ $F_{n}\left(1\right)=1$ $F_{n}\left(x\right)=n\cdot F_{n}\left(x-1\right)+F_{n}\left(x-2\right)$ For example: $F_{1}=\left[0,1,1,2,3,5,8,13,21,34,55,89...\ri... 3 answers · posted 2y ago by rak1507‭ · edited 1y ago by General Sebast1an‭ 60% +1 −0 Challenge Create a program that takes input of a string and outputs an integer using the following calculation system: The string can only contain +, -, *, /, ^, ! (or a different character; ! ... 1 answer · posted 1y ago by General Sebast1an‭ · edited 1y ago by General Sebast1an‭ 80% +6 −0 Two words are anagrams of each other if the letters of one can be reordered to spell the other; e.g. ADOBE and ABODE are anagrams. An alternate way of describing it is that both words contain the s... 5 answers · posted 2y ago by snail_‭ · edited 1y ago by General Sebast1an‭ 71% +3 −0 Given an array of numbers, output the length of the longest increasing (not necessarily contiguous) subsequence. It is guaranteed that there are no duplicates in the array. For example, if the inpu... 4 answers · posted 2y ago by Quintec‭ · edited 1y ago by General Sebast1an‭ 75% +4 −0 You have an army of size$n$that you need to split up to fight$k$battles simultaneously against an opposing army$A\$. In each battle, the army with the most troops present wins - no one wins a t...

2 answers  ·  posted 2y ago by Quintec‭  ·  edited 1y ago by General Sebast1an‭

71%
+3 −0

Given a musical key, output its number and letter on the Camelot Wheel (shown below). Input A musical key as a string, as shown on the wheel. The words "Sharp" and "Flat" may be replaced with s...

2 answers  ·  posted 2y ago by Quintec‭  ·  edited 1y ago by General Sebast1an‭

Featured
Hot Posts

This community is part of the Codidact network. We have other communities too — take a look!