You've intercepted a series of transmissions encrypted using an interesting and stupid method, which you have managed to decipher. The messages contain only ...

Peg Game At the arcade, you can play a simple game where a ball is dropped into the top of the game, from a position of your choosing. There are a number ...

You've been given a list of words to study and memorize. Being a diligent student of language and the arts, you've decided to not study them at all and ...

Double Squares A double-square number is an integer X which can be expressed as the sum of two perfect squares. For example, 10 is a double-square because 10 ...

You're interested in figuring out the number of case-insensitive unique characters in some string. This sounds simple and easily-automated, so you just decide ...