Questions tagged [code-golf]
Code-golf is a competition to solve a particular problem in the fewest bytes of source code.
11,827
questions
15
votes
4
answers
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Freely available books for code golfing? [closed]
Can you recommend any freely available books about code golfing in general and especially in Java and C++?
50
votes
49
answers
7k
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Tips for golfing in PowerShell
What general tips do you have for golfing in Windows PowerShell? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to PowerShell (e.g. "...
- 12.9k
35
votes
14
answers
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views
Drawing a cube in ASCII art
Task description:
Draw a cube in ASCII art in roughly a cabinet projection.
Monospaced fonts often have characters that are about twice as high as they are wide. ...
- 12.9k
6
votes
33
answers
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Print largest integer you can with the fewest characters [closed]
Find a way to output a large integer with few characters. Solutions will be scored based on the magnitude of the number and shortness of code.
EDIT: Let's impose a time limit of a minute on sensible ...
- 12.5k
27
votes
37
answers
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Finding "sub-palindromes".
The shortest code that finds all unique "sub-palindromes" of a string, that is: any substring with length > 1 that is a palindrome.
eg.1
...
- 5,452
75
votes
59
answers
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Tips for code-golfing in C#
What general tips do you have for golfing in C#? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to C# (e.g. "remove comments" is not an ...
- 1,863
38
votes
55
answers
4k
views
196 algorithm code golf
Write a short program for 196-algorithm.
The algorithm starts from an integer, then adds its reverse to it until a palindrome is reached.
e.g.
...
- 5,452
13
votes
1
answer
1k
views
Shortest path in a graph
Write a program to take a graph (from either standard input or a file, your choice) and find a shortest path in the graph.
Graphs are specified using the following format:
...
- 20.8k
6
votes
3
answers
431
views
Compress programs
Write a program/script that decompresses and passes any compressed data appended at the end of the binary/file as standard input to a program specified as arguments.
...
- 6,066
11
votes
1
answer
732
views
Write a compressing util for gzip files
The task of this challenge is as following:
Write a program that reads a file of reasonable size (let's say <16 MB) from stdin or anywhere else (however you like, but must not be hardcoded), and ...
- 10.1k
62
votes
30
answers
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Tips for golfing in C++
What general tips do you have for golfing in C++?
I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to C++ (e.g. "remove comments" is not ...
- 12.5k
37
votes
26
answers
33k
views
Morse code translator
Write the shortest program to transform the standard input into Morse code. Characters not in the table should be printed as they are.
- 6,066
-2
votes
1
answer
5k
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Poisson random number generator [closed]
What is the shortest function (implemented in C) that will return a random draw from a Poisson distribution (given the mean or λ parameter)?
...
- 732
11
votes
2
answers
3k
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Test if a given number is a Vampire Number [duplicate]
EDIT: In the interest of increasing the complexity, i've added more to the challenge.
In mathematics, a vampire number (or
true vampire number) is a composite
natural number v, with an even ...
- 2,208
4
votes
5
answers
935
views
Tree traversal. [closed]
Write the shortest code that traverses a tree, breadth-first.
Input
any way you like
Output
a list of "names" of the nodes in correct order.
- 5,452
36
votes
61
answers
5k
views
Sum of primes between given range
Write the shortest code for finding the sum of primes between \$a\$ and \$b\$ (inclusive).
Input
\$a\$ and \$b\$ can be taken from command line or stdin (space seperated)
Assume \$1 \le a \le b \le ...
- 2,208
48
votes
41
answers
17k
views
Obfuscated FizzBuzz Golf [closed]
Create the shortest possible obfuscated FizzBuzz implementation.
To be considered obfuscated, it should satisfy at least one of the following:
Does not contain any of the words "Fizz", "Buzz", or "...
- 1,199
149
votes
330
answers
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Fibonacci function or sequence
The Fibonacci sequence is a sequence of numbers, where every number in the sequence is the sum of the two numbers preceding it. The first two numbers in the sequence are both 1. Here are the first ...
- 4,917
147
votes
78
answers
25k
views
Interpret brainfuck
Write the shortest program in your favourite language to interpret a brainfuck program. The program is read from a file. Input and output are standard input and standard output.
Cell size: 8bit ...
- 6,066
24
votes
38
answers
4k
views
Reimplementing square root [duplicate]
Define a function, s, which takes a number and returns the square root.
No use of library functions, such as Java's Math.sqrt() or PHP's built in sqrt(), allowed.
- 1,145
242
votes
450
answers
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Golf you a quine for great good!
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 -- that means ...
- 2,697
326
votes
177
answers
138k
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Tips for golfing in Python
What general tips do you have for golfing in Python? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Python (e.g. "remove comments" is ...
- 12.5k
39
votes
21
answers
7k
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Angle between the hands on a clock [duplicate]
Given the time in 24 hour format (2359 = 11:59pm) return the angle between the minute and hour hands on a standard clock (on the ...
- 1,007
62
votes
64
answers
8k
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The Luhn algorithm for verifying credit card numbers, etc
Challenge
Write the shortest program or function to calculate the Luhn Algorithm for verifying (credit card) numbers.
Luhn algorithm explained
From RosettaCode, this algorithm for the purposes of ...
- 732
25
votes
12
answers
5k
views
Hamming numbers
Hamming numbers are numbers which evenly divide a power of 60. Equivalently, their prime factors are all \$ \le 5 \$.
Given a positive integer, print that many Hamming numbers, in order.
Rules:
Input ...
- 1,257
44
votes
69
answers
6k
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ROT-13 transform standard input
Task
Read a string of characters and produce the ROT13 of it. All characters besides [a-zA-Z] should be output verbatim. Each letter in the output may be in any ...
- 737
110
votes
116
answers
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Code Golf Christmas Edition: How to print out a Christmas tree of height N
Given a number N, how can I print out a Christmas tree of height N using the least number of code characters? ...
- 1,445