Arecibo Challenge Update

Since I was only getting a partial solutions from people I thought I'd host a google document that anyone can edit to share their progress. Feel free to post ideas etc. in the document.

https://docs.google.com/spreadsheets/d/1EF6XXsA681Ub5cKOgj-eww6PI5ytVYQ0F-A8QLSQbNU/edit?usp=sharing

Challenge II

Arecibo Challenge