Questions tagged [code-golf]
Code-golf is a competition to solve a particular problem in the fewest bytes of source code.
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Plot the ground path of a satellite
If you model a satellite as a free point orbiting a body, you can pretty easily see it has 6 degrees of freedom: three for the X, Y, and Z position, and three for the X, Y, and Z velocity. However, ...
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Minimum number of select-all/copy/paste steps for a string containing n copies of the original
This challenge is based on this Mathematics answer.
Write the shortest program or function that, when given some natural number \$n\$, outputs \$S(n)\$, which is the minimum number of steps for ...
- 10.2k
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Segments of a string, doubling in length
Simple task today. Given a string whose length is one less than a whole power of 2, divide it into segments with doubling length.
For example for the string ...
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8
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Sort Number Array
Given array \$A\$ \$(a_0, a_1,... , a_n) \$ as a permutation of \$(0, 1,...,n)\$ where \$n ≥ 2\$. Sort array \$A\$ into array \$(0, 1,...,n\$) with \$2\$ caveats:
\$1\$ swap is counted when swapping ...
- 123
7
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7
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Parity of a number with missing digits
It turns out that you need every digit of a number to determine its parity, if it is written in an odd base.
Your programs should take input as a number between 2 and 36 inclusive, and a nonempty ...
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7
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Output the Steiner system S(5,8,24)
Output 759 "rows", each of which consists of 8 distinct integers in the range 0,1,...,23, with the property that every set of 5 integers in the range 0,1,...,23 is contained in exactly one ...
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Binary Slashes Display
(easy mode of Seven Slash Display)
Given a positive integer (or alternatively, a string/list of bits of its binary representation) output it with this diagonal ASCII-art formation:
(output for 53 / <...
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Transpose these notes!
In this challenge, you should take input as a number between 0 and 11 inclusive and a (possibly empty) list of the following strings/notes:
...
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14
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NaN is not equal to NaN
In many programming languages, the floating-point value NaN, or "not a number", in some programming languages generated by the expression ...
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2
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Write a function that takes an input string and encodes it using a modified Fibonacci sequence in reverse [closed]
Given an input string, first convert each character to its ASCII value.
Generate a reversed Fibonacci sequence of the same length as the input string.
Encode each character by adding its ASCII value ...
- 21
14
votes
5
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Generate a subgroup of a free group
In group theory, the free group with \$n\$ generators can be obtained by taking \$n\$ distinct symbols (let's call them \$a, b, c ...\$ etc), along with their inverses \$ a^{-1},b^{-1},c^{-1} ...\$ . ...
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16
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23
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Smallest Harmonic number greater than N
The sequence of Harmonic numbers are the sums of the reciprocals of the first k natural numbers (not including zero):
\${\displaystyle H_{k}=1+{\frac {1}{2}}+{\frac {1}{3}}+\cdots +{\frac {1}{k}}=\sum ...
- 8,612
13
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9
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Sum of square roots (as an algebraic number)
An algebraic number is a number that is a root of a non-zero polynomial with integer coefficients. It is well-known that the sum of two algebraic numbers is algebraic. In particular, the sum of a list ...
- 48.7k
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Find characters common among all strings
Find characters common among all strings
You are given multiple Strings as an input. Your task is to find the characters that are present in every string, and ...
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7
votes
7
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Build the first 6 letters of an Italian codice fiscale (tax identification number)
Given a single string with a person's name and surname, output the first 6 characters of their codice fiscale.
Codice fiscale
Codice fiscale is a 16-character long alphanumeric string that identifies (...
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