Context
At Hogwarts School of Witchcraft and Wizardry, students are sorted into 4 houses, 0 - Gryffindor, 1 - Ravenclaw, 2 - Slytherin and 3 - Hufflepuff. This sorting is done by a magical hat, called the Sorting Hat.
Task
Your task is to code a sorting hat. In other words, you should create s...1
If you place the suffix n't on any given word, it instantly means the opposite of the intended usage of the word.
If you place the word not before any given word, it instantly negates the next word.
Therefore, today's challenge is about turning words in the form of not <word> into <word>n't
Ru...
Here, x (supplied as input) and n (the result of your computation) are both positive integers. n * x = n shifted. Find n.
Here's an example of shifting:
123456789 -> 912345678
abcdefghi -> iabcdefgh (letters = any 0~9 digit)
123 -> 312
Rules
Preceding zeros count after shifting. If th...
The purpose of this task is to write a program or function to find the most common substring within a given string, of the specified length.
Inputs
A string, s, of any length and characters that are valid as inputs for your language.
A number, n, indicating the length of substring to find. Gua...
Find the largest deletable prime with no zeros code-challenge primes
Inspired by Find the largest recurring prime and Find the largest fragile prime
Deletable primes (A080608) are primes such that removing some digit leaves either the empty string or another deletable prime.
Examples
415673 i...
Mr.Oś odometer shows a mileage of 126251 kilometers.
In how many kilometers will the odometer show a palindrome number?
18
Is this list modulus-aligned?
code-golf math
Two numbers are aligned in a modulus when they both share the same remainder when they can be put under the modulus function against an integer greater than or equal to 2 and less than or equal to the absolute value of both.
For example,
13 and 22 ...
