This impossible object is Reutersvärd's triangle: Draw your own version according to these rules: Exactly 9 cubes total Each side is made up of exactly 4 cubes The cubes appear to overlap such that the rendered object is in fact an impossible object 4 distinct colours are used - one for the ...

Challenge Given a size s, print a cube net of that size made of hash symbols (#) and spaces (). Examples: 1: # # # # # # 2: # # # # # # # # # # # # # # # # # # # # # # # # 3: # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #...

Longest Cycle in a Graph Given a directed weighted graph, output the length of the longest cycle. Rules Any reasonable input format is allowed (e.g. list of nodes and vertices, weighted connectivity matrix). All weights will be positive integers. The labels are not important, so you may impos...

Primes that are primes in binary too Task The task is pretty simple. List out all the non-negative integers under a given non-negative integer n, that are prime and count of 1's and 0's in their binary representation (having no leading zeroes) are prime too. Here are the first five such...

Motivation: Sometimes you need to know where you are in a string. You want to be able to look at any part of a string and know exactly where you are, as far as possible. Challenge: write a program to output a tape measure string of a given length. A tape measure string self describes its length-...

Given 3 input items, a list of coordinate pairs, a 2D string, and a single-character string, output whether the character at each coordinate of the 2D string is equal to the single character. You can take the input in any order. Example: (0,0), "#_\n__", "#" -> True The string is #_ __ The...