Hello, Codeforces!

Our team is delighted to announce that the Massachusetts Computer Science Olympiad (MACSO) is back! We invite you to the largest high school competition in Massachusetts this Summer to solve puzzling problems, meet ambitious peers passionate about Computer Science and grab some swag! For the online participants, we'll make sure to provide you with the best remote experience we can :)

We are excited to see you at MACSO Summer 2025 on July 27th at the Brookline Teen Center or online.

The qualification round is live and can be accesed by this link:

Let's recap our last year's event