Using cryptographic functions in a cops and robbers challenge
Almost every cops and robbers challenge will have the following requirement:
Using cryptographic functions such as hashes or PRNGs is disallowed
...and for good reason. A trivial answer such as if (hash(input) == "[ example_hash ]") ...
13
Inspired by the previous question.
Golomb's self-describing sequence g(n) is a sequence where any natural number n is repeated within the sequence g(n) times.
The first few numbers in the sequence are:
n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
g(n) 1 2 2 3 3 4 4 4...
2
0
Double Prime Words
Consider a word/string of length n, only including the letters A-Z, a-z. A word/string is a double prime word if and only if x is prime and the sum of the letters, s, is also prime, using their numeric position in the alphabet (a=1, B=2, c=3, etc.).
Input can be any combination...
0
Consider a word/string of length n, only including the letters A-Z, a-z. A word/string is a double prime word if and only if n is prime and the sum of the letters, s, is also prime, using their numeric position in the alphabet (a=1, B=2, c=3, etc.).
Input can be any combination of upper or lower ...
29
Formulating the challenge as something and then including a twist that completely changes the task
Don't hide information from the reader. Don't enounce the challenge as something that later on it will turn out not to be.
To ellaborate, consider the following formulation:
Do < task A, usually ea...
Here on Mi Yodeya, one can earn the "Fanatic" badge for visiting the site for 100 consecutive days.
Is it halachically possible to earn the fanatic badge in the Diaspora?
1
Introduction
Arrays are usually used with for-loops or iterators. One different task might be the use as a cheap way to rotate through a set of items, so after reaching the last index, the next item would be the first item of the array. This is useful for cases like menus and physical controls.
C...
