Tetrahedron countdown A 1-dimensional countdown from 5 looks like 54321 A 2-dimensional countdown from 5 looks like 54321 4321 321 21 1 Finally, a 3-dimensional countdown from 5 looks like 54321 4321 321 21 1 4321 321 21 1 321 21 1 21 1 1 The 1-dimensional countdown...

Output a sandpile An abelian sandpile, for our purposes, is an infinite grid with integer coordinates, initially empty of sand. After each second, a grain of sand is placed at (0,0). Whenever a grid cell has 4 or more grains of sand, it spills one grain of sand to each of its four neighbors simu...

Decipher Neurotic Frogs Now that Puzzling.SE has finally cracked my amphibian-obsessed cipher, let's write a program or function to decrypt it! (If you want to look at the puzzle before having it spoiled for you, I suggest you go there now.) How the cipher works In Neurotic Frogs Ought To R...

Here's a relatively simple challenge for you: Given a list of positive integers: Line them up in a grid, and sum each column. For example, if the input was [123, 7, 49, 681], the grid would look like this: 1 2 3 7 4 9 6 8 1 And the sum of each column would be [18, 19, 4]: 1 2...

Challenge You must choose one number x (y = x + 9) and create ten unique programs which each print out one of the numbers in the range x to y inclusive. However, there are three twists: Each program's score is the difference between length of your program in bytes and n (where n is the number ...