15 questions linked to/from Wind me a number snake!
7k views

### Cops: Make a regex - Make a snake

This is the cop's thread. The robber's thread is here. Write a code that takes an input n and creates a n-by-n "snake matrix". A snake matrix is a matrix that ...
3k views

### Asterisk spiral

Given the spiral of size S and the step N, output the "square" S*S spiral having ...
1k views

### Number Spiral Problem

A number spiral is an infinite grid whose upper-left square has number 1. Here are the first five layers of the spiral: Your task is to find out the number in row y and column x. Example: ...
1k views

### Roll the Alphabet into a Spiral

Write a program or function that, when given n, will print a spiral n characters long made up of the Latin alphabet ...
935 views

### Can square tree rings be generated from primes?

Apparently yes! In three easy steps. Step 1 Let f(n) denote the prime-counting function (number of primes less than or equal to n). Define the integer sequence s(n) as follows. For each positive ...
2k views

### pssssssssssssst

Introduction This is one is pretty straightforward. We will be drawing a snake in ascii. This was inspired by that old snake game where you have to collect the fruit and you continuously grow. ...
775 views

### Spiral neighbourhoods

If we take the natural numbers and roll them up counter clock-wise into a spiral we end up with the following infinite spiral: ...
1k views

### Alphabet Spiral

You are to write a program or function that outputs this exact text: OPQRSTU NQPONMV MREDCLW LSFABKX KTGHIJY JUVWXYZA IHGFEDCB May also be lowercase and trailing ...
631 views

### Roll the carpet

This question is inspired by Kevin Cruijssen's question. Now that the carpet is laid out, we want to roll it. Your task is to write a program that takes a string and returns a spiral made from this ...
700 views

### Square-unspiral the string!

Given a string, first square it as follows: First, write the string. abcde Next, write the string rotated one left. ...
579 views

### Determine the position of a non-negative number in the infinite spiral

Definition The infinite spiral used in this question has 0 on the position (0,0), and continues like this: ...
334 views

### Return Spiral Indexes!

Spirals are cool , so are numbers, and number spirals are even cooler. But what if I want a specific number, in a specific place using xy coordinates... Challenge Using an infinite spiral moving ...
181 views

### Flattened Spiral Permutation Index

Context Consider square matrices with n columns and rows containing the first n^2 (i.e. n ...