I’m a Commodore guy through and through. This isn’t tribalism, it’s what was in my room from 1983 to when I graduated High School in 1993. After my sorta failed attempt at spending the month of September with my Coco 2, I decided for October to try spending a week at a time with a particularly less familiar computer. So starting on October 1st, and ending on the 7th, I spent my free time with the Atari Systems that I have.

What’s the 100 door problem? It’s a just for fun problem in “beginning” math and computer courses. The idea is simple: There are 100 closed doors in a row. You walk past the doors 100 times (100 passes) The first time, visit every door. If the door is closed, open it. If it is open, close it. In programming, you’d probably call this toggling the door so let’s call it that.