Background
Given a triangle \$ABC\$, extend its three sides by the opposite side length, as shown in the figure below. Then the six points surprisingly lie on a circle called the Conway circle, whose center coincides with the incenter.
Task
Given three side lengths \$a,b,c\$ of the triangle ...
A065825 code-golf sequence arithmetic
(This is A065825.) The sequence defaults apply, so you can pick another format other than this one.
Given an input integer n, find the smallest number k so that there exists an n-item subset of {1,...,k} where no three items form an arithmetic progression.
...
when I connect my 16 GB flash memory to my PC, it appears as empty 196 MB disk, as I show in the image,
Given a string that contains only lowercase letters, encode that string with the alphabet cipher.
To encode with the alphabet cipher (I will be using the example hello):
First, convert each letter in the string to a number depending on its position in the alphabet (a = 1, b = 2, etc.) Example:...
Balanced bases:
Balanced bases are essentially the same as normal bases, except that digits can be positive or negative, while in normal bases digits can only be positive.
From here on, balanced bases of base b may be represented as balb - so balanced base 4 = bal4.
In this challenge's definit...
The player has to keep guessing a number from 1 to 10 until they guess the correct number to win the game. If they make an incorrect guess, they're told if their guess was too low or too high.
Each line has to render below the previous line for me to accept the solution as the new code for the g...
Let's say I have a .env file with the following contents:
CF_WORKERS_ACCOUNT_ID=abcdef34632114
CF_WORKERS_API_TOKEN=abcdef34632114def3463def3463
FAB_DEV_ZONE_ID=434932843272439874329
I'm doing a screencast, and I want to quickly cat .env to show what's in the file, without broadcasting the exa...
Bitwise Addition
code-golf algorithm
Your job is to implement bitwise addition.
To ensure that this is done, you will compute and print the result of addition without carry (or bitwise XOR). Then, you will compute the carry of the addition (bitwise AND) and multiply it by two (bitwise left shi...
Frustration is a solitaire card game which is played by calling out the sequence:
“Ace”, “Two”, “Three”, ... , "Nine", "Ten", “Jack”, “Queen”, “King”, “Ace”, “Two”, etc.
With each call, you simultaneously flip over a card from a shuffled deck of 52 cards. You win the game if you get through the...
Task
Given a string as input, generate a "blurred" version of that string.
Input
Your input will be a single-line string, containing a minimum of 2 alphanumeric characters.
Output
A string that is the "blurred" version of the input string.
A blurred string is one where every character from ...
Island Rose Breeder
Island Roses have an extremely simple genetic code, with just 4 genes: R, Y, W, and B, each with two alleles. This means their entire genome can be represented by four 2-bit gene pairs of the form: 00-00-00-00 (01 and 10 are equivalent)
Island Roses can be bred together. Whe...
