Questions tagged [code-golf]
Code-golf is a competition to solve a particular problem in the fewest bytes of source code. If you want to score by characters instead of bytes, please state this explicitly in the challenge. If source code length is not the primary scoring criterion, consider using another tag instead.
9,080
questions
2
votes
0answers
67 views
Mutation chain generator [duplicate]
Given a start word and a target word, print the "mutation chain" that starts at the start word and ends at the target word.
You may assume both words are lowercase and only have alphabetic characters....
9
votes
28answers
1k views
String to Bit Transition
Task
Given an input string of one or more ASCII characters which codepoints are between 0 and 128 (exclusive), do the following:
Convert each character into its 7-bit ASCII code (if the ASCII code ...
14
votes
9answers
967 views
Fivenum and a little bit
(a paradox, a paradox, a most ingenious paradox)
This is the first part of a multipart series inspired by different R functions.
The Task
Given a dataset \$D\$ of positive integers, I need you to ...
59
votes
94answers
10k views
Print the last, middle and first character of your code
The challenge is simple: Print the last, middle, and first character of your program's source code, in that order.
The middle character is defined as follows, assuming a source length of ...
1
vote
14answers
192 views
Reverse Cat Programme [duplicate]
Simple problem, create a programme that takes one input, and the outputs that input in reverse.
Some test cases are [input -> output]:
...
11
votes
24answers
3k views
Shortest hex dumping program
Challenge
Write a console program to display every byte of a file in hexadecimal (0-9 ...
-4
votes
4answers
103 views
One square root function for unsigned numbers [closed]
One square root function for unsigned numbers
Write the function sqrti(x) that from one not negative integer number x, it returns the integer square root of that number truncate to the 0 digit, so ...
26
votes
55answers
6k views
Integer Lists of Noah
Introduction:
I think we've all heard of it, but here a very brief summary: Noah gathered two of every species of animal on the planet, male and female, to save in his Ark during a great flood. The ...
-1
votes
3answers
220 views
Find all a, b, c, d, e, such that a + b + c + d + e = 1000 with no more than 3 loops [closed]
The rule is:
a, b, c, d, e is an integer from 0 to 1000, no relation between ...
10
votes
55answers
6k views
Swapping “Good” and “Bad”
Challenge Description:
Write a program that asks the user for input. The user will enter Good or Bad. You do not have to ...
2
votes
3answers
115 views
Sum of multiples of powers of ten of an integer [duplicate]
Write a function to produce, for a non-negative integer, a string containing a sum of terms according to the following:
...
17
votes
23answers
7k views
Can Jimmy hang on his rope?
Yet another Jimmy challenge by his original father. See these other lovely challenges.
As you all know, recently we've been seeing challenges related to Jimmy on platforms. Now, Jimmy is an acrobat ...
-4
votes
3answers
100 views
Geiger counter prime generation [closed]
This challenge is quite simple to conceptualise, but likely a lot harder to execute.
In this challenge, the program will have to detect the number N of its characters that have been randomly changed (...
16
votes
8answers
1k views
Jimmy needs your help!
It seems as of recent, there have been a lot a Jimmys falling to their death, as can be seen here, and here where you were asked to determine if Jimmy would fall. It is time we put a stop to this ...
7
votes
17answers
1k views
Tesco's Burger Relish Best Before End date number
Given a date between 2010-01-01 and 2099-12-31 as three integers (please state your order if not [year,month,day]), answer with Tesco's corresponding five-digit ...
20
votes
8answers
911 views
Alice's First Code Review
Alice is an intern in a company that uses Brainfuck as a primary language for both client-side and server-side development. Alice just has written her first code and she's a bit nervous as she's ...
-4
votes
2answers
194 views
Feliz navidad prospero año [duplicate]
UP So christmasSSSSSS is coming and carols are on the radio all day. Jose Feliciano's Feliz Navidad song is a good example of this. Your task is to print the entire (and repetitive) song.
Lyriiiiiics:...
5
votes
2answers
405 views
Can the cursor reach the bottom?
In a matrix of characters, a cursor is a movable position between two adjacent characters, before the first character or after the last character in a line, like that "I"-shaped indicator which moves ...
16
votes
62answers
5k views
Write a function [closed]
I honestly can't believe this challenge does not already exist.
The challenge
Write a function.
The specifics
Your program must define some sort of callable function. This includes anything ...
28
votes
13answers
5k views
How many Jimmys can fit?
In this simple but fun challenge, you were asked to determine if Jimmy would fall of their platform. Jimmy has three body parts /, ...
10
votes
3answers
831 views
Multi-user CRUD: Valid, Problem, or Error?
Introduction:
Ever used Dropbox with some other people and you both modified the same file? Ever had a multi-user application with a relational database, and two people were modifying (or worse, one ...
10
votes
9answers
1k views
n-level Ouroboros Quine
This 128-language quine ouroboros (a program which outputs a program in another language, which outputs a program in yet another language, (125 languages later), which outputs the original program) is ...
-3
votes
2answers
229 views
Smallest web server [closed]
Create your smallest web server in your preferred language!
Requirements
Must respond to atleast 1 type of request (get,post,patch,delete), with a specified string.
Smallest implementation wins!
*...
28
votes
41answers
9k views
Will Jimmy fall off his platform?
Backstory
Meet my friend Jimmy:
/o\
Jimmy is a little character who likes to stand on platforms. Here's Jimmy safely standing on a platform:
...
-5
votes
5answers
108 views
Report divisibility with arithmetic integer operations only [closed]
Given two numbers, the first is greater than the second, check whether the first number is divisible by the second without a remainder. If divisible, answer "yes"(...
-2
votes
2answers
122 views
Generating all Character possibilities with two characters [duplicate]
Introduction
So the Challenge is to give out all combinations with two Inputs. The length of the string is also optional and you should be able to edit this.
I've selected this channel because I ...
37
votes
31answers
14k views
Do the 26 richest billionaires own as much wealth as the poorest 3.8 billion people?
Introduction:
A few days ago I read this post with the same title when I came across it in the HNQ. In this question it is being discussed if the claim of president-candidate Bernie Sanders, who ...
-2
votes
6answers
191 views
Add 2 positive integers by playing with bits [closed]
Given 2 positive integers in any format you'd like, return their sum using only logic gates and bit shifts (see example below). Don't worry about overflow.
EDIT: Using pre-written addition is ...
11
votes
7answers
4k views
Find the closest HTML colour name
Input
A single hex 6-digit colour code, capital letter, without #. Can also be a 24-bit integer if you prefer.
Output
The closest HTML color name (e.g ...
23
votes
23answers
2k views
Find the closest three-digit hex colour
In CSS, colours can be specified by a "hex triplet" - a three byte (six digit) hexadecimal number where each byte represents the red, green, or blue components of the colour. For instance, ...
5
votes
2answers
292 views
12
votes
3answers
466 views
Implement a strongly Darboux function
According to Wikipedia, a strongly Darboux function is
one for which the image of every (non-empty) open interval is the whole real line
In other words, a function \$f\$ is strongly Darboux if ...
29
votes
17answers
3k views
A quine of sorts
Given a string x, output the characters in x sorted according to the order of appearance in your source code.
Examples
...
24
votes
13answers
4k views
Two palindromes are not enough
Some numbers, such as \$14241\$, are palindromes in base 10: if you write the digits in reverse order, you get the same number.
Some numbers are the sum of 2 palindromes; for example, \$110=88+22\$, ...
-5
votes
1answer
339 views
Write the shortest O(n^2) sorting algorithm [closed]
Write a sorting algorithm for a list of integers that has an average performance of O(n^2).
This is code-golf, so the shortest code in bytes wins.
RULES:
The characters wasted for the declaration ...
43
votes
12answers
3k views
Prime parity peregrination
The purpose of this challenge is to graphically depict a walk on the plane, where the direction of each step \$k\$ is determined by the primality of \$k\$ and the parity of its binary expansion. ...
29
votes
7answers
7k views
Golf the smallest circle!
The problem:
Given a non-empty set of points in the Cartesian plane, find the smallest circle that encloses them all (Wikipedia link).
This problem is trivial if the number of points is three or ...
7
votes
5answers
632 views
Output the nth 'boring' number
There are 9 main types of numbers, if you categorise them by the properties of their factors. Many numbers fall into at least one of these categories, but a few don't. The categories are as follows:
...
5
votes
1answer
141 views
Letter Boxed, part 2: this time, solve it
This challenge is a sequel to Letter Boxed Validator.
The New York Times has a daily online game called Letter Boxed (the link is behind a paywall; the game is also described here), presented on a ...
6
votes
6answers
258 views
Inverse-quotes-quine, inverted (pt. 2)
Based on a comment by Jo King on my previous question (called 'Inverse-quotes-quine'), I present this new question. The rules are similar, but just, the opposite:
If your program is run normally, all ...
23
votes
19answers
3k views
Analog is Obtuse!
An analog clock has 2 hands*: Hour and minute.
These hands circle the clock's face as time goes by. Each full rotation of the minute hand results in 1/12th of a rotation of the hour hand. 2 full ...
3
votes
5answers
457 views
Number conversion
Assume that there is a number a. In every conversion of that number, the number can either convert itself to its value plus the value of one of its digits, or ...
32
votes
47answers
4k views
Alphabet completion rate
Introduction
How much of the English alphabet does a given string use? The previous sentence uses 77%. It has 20 unique letters (howmucftenglisapbdvr), and 20/26 ≃ 0.77.
Challenge
For an input ...
29
votes
18answers
2k views
Inverse-quotes-quine
The prospect of this challenge is:
If your program is run normally, all of the code in the speech marks (" - double quotes) should be printed.
If your program is ...
16
votes
13answers
3k views
Is my Rep in Stack-Exchange Form?
Premise:
Your reputation is in Stack-Exchange Form if it can be represented by decomposing your medal counts (gold, silver, and bronze counted separately) into their base-10 digits and joining them ...
12
votes
7answers
842 views
Find the diameter of a word graph
Introduction
A popular word puzzle is to convert one word into another via a series of steps which replace only one letter and which always result in a valid word. For example, BAG can be converted ...
39
votes
21answers
6k views
Impossible darts scores
I was surprised to not find this asked already, though there is a great question on darts checkouts: Darts meets Codegolf
Your challenge is to calculate which scores are not possible with 'n' darts ...
6
votes
1answer
230 views
Convert a string containing integers to list of integers
What is the shortest way to convert a string containing integers separated by spaces to a list of integers?
input : "-3 1 5 8 10"
output : [-3, 1, 5, 8, 10]
I regularly face this situation and I ...
10
votes
22answers
2k views
Find the C-factor of a vote
In this challenge you will be determining how controversial a vote is, given an array of other votes, by figuring out a number called the C-factor. What is the C-factor, you ask?
Well, imagine you've ...
13
votes
4answers
435 views
Distributing parliament seats
Introduction
In a general election, one would like to calculate a constant price per parliament seat. This means that for N >= 0 seats to be distributed and a ...
