The Massachusetts Computer Science Olympiad is a high-school programming competition hosted by the leaders of Brookline Computer Science Initiative. Our goal is to provide Massachusetts CS students with hands-on experience and opportunities
to build a network of fellow coders through an in-person coding competition
MACSO '24
Check out some highlights from our last competition!
The competition is open to high school students of all programming backgrounds. Whether you are a beginner or an advanced coder, you are welcome to participate! After you get your code forces username verified you can start the competition
How does the competition work?
The competition has two parts: an online qualification stage (Spring 2025) and in-person finals (separate online finals for those who can't make it). The qualification stage consists of three coding problems with no time limit (tie breakers
decided from amount of time used), and the top 50 qualify for the finals.
What is the scoring system like?
Qualification: IOI system. Each problem is either graded either by groups or by each test individually. Finals: ICPC system. each problem is either solved or not. The time penalty serves as tie breaker
When and where is the competition?
The competition will be held at the Brookline Teen Center Spring 2025. The in-person competition lasts three hours and includes free pizza, prizes (Amazon giftcards), and activities.
How can I register for the competition?
You can register for the competition by clicking on the Register Here button at the top of the page. It will take you to the
registration form where you can fill in your details.
Can I participate if I’m not in Massachusetts?
Yes, online participants who can’t make it in person can qualify for the online finals!
Meet the Team
We are a group of students at Brookline High School passionate about computer science. Our goal is to give aspiring programmers in Massachusetts an experience beyond the school curriculum.
Lucas Chen
Cofounder, Website Designer, Fund Manager
Mikhail Zhernevskii
Cofounder, Competition Director, Problem-writer
Tyler Sacharow
Cofounder, Advertiser, Problem-writer
Sergey Zatsepin
Problem-writer
Shruti Dhumak
Judge, Senior Engineer at Google
Shruti is a Sr. Customer Engineer at Google working with their Cloud practice at the Cambridge office. She has extensive experience in technology and was a Sr. Systems Engineer at Juniper Networks before joining Google. Shruti graduated from University
of Massachusetts, Amherst with a Masters in Computer Engineering in 2016. She has been actively contributing to students in STEM over more than 6 years.
Ethan Chen
Fundraiser
Our Sponsors
A huge thanks to our sponsors. Without their support, MACSO wouldn't be possible.
Brookline Teen Center
Russian School of Mathematics
KTBYTE
Wolfram
JetBrains
Data Intensity
Brookline High School
Hack Club
Art of Problem Solving
Algoverse
Partner Competitions
Here are our partner competitions. We strongly recommend to try their competitions as well!