Work your way through a series of coding problems. Each solution will provide you with a reference number. Using the passwords page you can then look up the number and gain the required password (the gift recipient). 

Once you have the password simply add it to the URL as follows

https://sites.google.com/view/codeadvent/????

(You'll need to replace the ???? with the password of course!)

The tasks are generally designed around Python but you can use language, perhaps not Fortran?

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