CS50x Puzzle Day 2019

The puzzles are now available!

Hello, world! This is CS50x Puzzle Day 2019. Starts anytime after 00:00 on Friday, 29 March 2019, in your own time zone. Ends anytime before 23:59 on Monday, 1 April 2019, in your own time zone.

Open to CS50 students around the world (and friends). Team of size 2, 3, or 4 are encouraged but not required. You can collaborate with your team in person or online. Or you can participate on your own. Event itself is online.

See https://medium.com/@cs50/this-was-cs50x-puzzle-day-2018-22d95a48615 for last year’s results and sample puzzles.

How It Works

Register

Register at cs50.ly/register anytime before 23:59 on Monday, 1 April 2019. Every member of your team should register individually by submitting that form as well. There is no separate team registration; instead, you’ll be able to tell us your team name and the name(s) of any teammate(s) when you submit your solutions using the link below.

Hosting

If you’d like to host CS50x Puzzle Day 2019 in your area by arranging a time and place for your team and other teams to gather, submit cs50.ly/host!

If you’d like to see if someone in your area is already hosting, see cs50.ly/hosts!

Puzzles

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The puzzles are available! Download puzzles.pdf!

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Questions

If you have a question about a puzzle, email puzzles@cs50.harvard.edu, and we’ll do our best to reply! Afraid, though, we won’t be able to offer any hints or tips!

Photos

Take photos while you work on the puzzles! Then submit them at cs50.ly/photos!

Submit

Submit your answers at cs50.ly/submit by 23:59:59 on Monday, 1 April 2019, in your own time zone!

Winners

Check back here a few days after Monday, 1 April 2019, to see who’s won CS50 certificates!

Walkthroughs

Check back here a few days after Monday, 1 April 2019, for walkthroughs of all of the puzzles!