Vector Encoding Optimization
code-golfprimes
A positive integer can be converted to a vector of integers as follows:
-Find its prime factors, expressed in the following form:
(carry this product out to as many terms as needed, in theory it continues ad infinum but it is not necessary to car...
https://en.wikipedia.org/wiki/Losing_chess
This is basically Chess Tournament, but for antichess ;)
Antichess is one of the many chess variants that have been invented. The goal is to lose all your pieces (this may seem a little odd, but it's called antichess for a reason).
The rules
The rul...
In this challenge, you are passed two things:
A string length, N
A list of strings, L, each with an assigned point value. Any string that is not passed in has a point value of 0
You need to construct a string of length N such that the sum of all substring points is as large as possible.
For...
Many important topics in abstract algebra involve a binary function acting on a set. A number of properties of such functions have been defined in the investigation of such topics.
Your challenge will be to determine whether a given binary function on a given domain possesses five of these prope...
Given a string input, your task is to write a program that prints a truthy value to STDOUT or equivalent if the input contains "2016" anywhere in it without using any built-in contains, match, replace, or alike functions.
A truthy value also must be printed if the input contains "2016" with the ...
Paper stars are a big thing in my family at christmas, so I thought a virtual one would be cool.
Below is an image of a regular dodecahedron (from https://en.wikipedia.org/wiki/Dodecahedron, attributed to the author mentioned there.)
The process of stellation (wikipedia) when applied to a pol...
Are these notes musical?
code-golf music
Background
Musical notes are arranged in octaves, and there are 12 notes in an octave:
A A# B C C# D D# E F F# G G#
in that order. In this challenge, they will be represented by the numbers 0 through 11. (Let's say, arbitrarily, that 0 represents A.)...
Santa needs some help determining how many elves he will need to help him deliver gifts to each house.
Coal is considerably heavier than presents, so santa will need three elves for every naughty person in the house. Only two elves are needed to help santa carry presents.
On santa's map, a hous...
Counting Quipu
code-golf number
Quipus are an ancient device used by the Inca in the Precolumbian era to record numbers in a base ten positional system of knots on a cord. The system is rather simple and not so different from our own.
Each cluster of knots is a digit, and there are three ma...
Quipus are an ancient device used by the Inca in the Precolumbian era to record numbers in a base ten positional system of knots on a cord, which works as follows:
Each cluster of knots is a digit, and there are three main types of knots: simple overhand knots; "long knots", consisting of an ...
Parenthesize an expression
Recently I've been writing a new language, to avoid needing to handle order of operations, I simply parenthesize each expression properly to avoid this entirely.
Because they are only 10 numbers in base-10, your code will need to be as short as possible.
Examples
...
It's almost Christmas, so Santa has to plan his route. You're helping him, for reasons unknown.
Santa needs help planning the route and wants you to give him a solution, but since you're all ungrateful and unwilling to give to the man who has given you so much, so have decided to give him a prog...
Rearrangement Inequality: The Sequel code-challenge
Read the previous version here.
Your mathematics teacher looked at your test results on inequalities. Not good.
Hence he decided to give you some homework on inequalities.
Since this is about inequalities (how unfair), he decided to give eac...
