Massachusetts Computer Science Olympiad
MACSO 2026 August 21, 2026
p.s. — we're hiring! join the MACSO leadership team →
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 Fall '25
MACSO '24
MACSO '24 Final Standings
In-Person HS Finals
| Award | Full Name | School |
|---|---|---|
| 1st | Mark Zhou | George School, PA |
| 2nd | Artur Gilfanov | Fairview High School, CO |
| 3rd | Yancheng Zhao | Buckingham Browne & Nichols School, MA |
| hm. | Zachary Rogers | Brookline High School, MA |
| hm. | Leran Tao | Newton North High School, MA |
| hm. | Milo Chourmet | Roxbury Latin School, MA |
| hm. | Austin Liu | Belmont High School, MA |
Online Open Finals
| Award | Full Name | School |
|---|---|---|
| 1st | Jaehyun Koo | Massachusetts Institute of Technology, MA |
| 2nd | Julian Wu | Westview High School, CA |
| 3rd | Yu Zheyuan | NUS High School of Math and Science, Singapore |
Questions we get a lot
Contact [email protected] for any questions.
Who can participate in the competition?
Anyone is welcome to participate this year — there is no qualification requirement. Whether you're brand new to competitive programming or have competed before, we'd love to have you join us!
How does the competition work?
MACSO 2026 is a single in-person contest: 6 coding problems, a 2-hour contest, competed individually. There's no online qualification stage this year — just register and show up!
What is the scoring system like?
The contest uses the ICPC system: each problem is either solved or not, and the time penalty serves as tie breaker.
When and where is the competition?
MACSO 2026 takes place on Friday, August 21, 2026, from 1:00 PM to 4:00 PM at 101 Rogers Street, Cambridge, MA 02142. Please arrive by 12:45 PM so we can get everyone checked in before the contest begins. Prizes will be awarded to our top competitors, just like last year!
How can I register for the competition?
You can register by clicking the Registration Form button at the top of the page, or directly through the registration form where you can fill in your details.
Can I participate if I’m not in Massachusetts?
Yes! Anyone is welcome and there is no qualification requirement. This year’s contest is in person, so you’ll just need to make it to Cambridge on August 21.
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.
@bhs.computerscience
Sergey Zatsepin
director, problem author
Ethan Chen
head of fundraising
Dana
problem writer assistant
the founders
Mikhail Zhernevskii
cofounder, ex-director, ex-problem author
Lucas Chen
cofounder, website designer, ex-fund manager
Tyler Sacharow
cofounder, ex-advertiser, ex-problem author
the judge
Shruti Dhumak
judge, senior engineer at google
read her bio ↓
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.
Our Sponsors
A huge thanks to our sponsors.
Partner Competitions
We recommend trying their competitions as well!
Want to practice?
To learn the algorithms and data structures for MACSO, you can use websites like USACO Guide or Algorithms for Competitive Programming.
Where to Find Us
The Foundry — 101 Rogers Street, Cambridge, MA 02142