Announcements

Demanding, but definitely doable. Social, but educational. A focused topic, but broadly applicable skills. CS50 is the quintessential Harvard course.”

CS50’s next lecture, aka Week 4, is 2023-10-02T13:30:00-04:00/2023-10-02T16:15:00-04:00, in Sanders Theatre. Attendance is expected in person unless simultaneously enrolled, per cs50.ly/simultaneous. Whoopie pies for snacks!

CS50 Lunch

RSVP at cs50.ly/lunch if you’d like to join classmates and staff for CS50 Lunch this 2023-10-06T13:15:00-04:00/2023-10-06T14:30:00-04:00!

Live Stream

Ready Player 50

Like to learn more about artificial intelligence (AI), large language models (LLMs), and prompt engineering? Register for Ready Player 50 at cs50.ly/register.

The CS50 Duck has a secret. Can you convince it to reveal its secret? Join CS50 and Lakera.ai for a challenge in which you’ll face none other than CS50’s duck debugger, aka ddb. But be warned: each time you crack the code, the CS50 Duck will “level up” and become more protective.

Along the way, learn about prompt engineering and, in turn, prompt-injection attacks, which can be a problem with large language models (LLMs). This challenge is a new version of the world-famous prompt-injection game Gandalf, designed specifically for CS50.

Starts 00:00 on Friday, September 29, 2023, in your own time zone. Ends 23:59 on Monday, October 2, 2023, in your own time zone. Teams of size 2, 3, or 4 are encouraged, but you may form larger teams of reasonable size. Open to anyone online, whether taking CS50 or not, including friends and family back home!