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Hello, World!

Welcome to the PEG Online Judge. This site was created by members of Woburn Collegiate Institute's Programming Enrichment Group as a resource for competitive programmers everywhere. We also run PEGWiki, a site for information and tutorials of algorithms.

Currently, we have 1134 problems, 443761 submissions, 277 analyses, and support for 15 languages.

If you are new here, register an account and get familiar with the judge by solving A plus B. Alternatively, you can try a random problem that you haven't solved.


Announcements (See All)

CCC/CCO 2017 Problems Added

by Alex on Aug 09, 2017 - 7:40:12 am UTC

Woburn Challenge Finals Results

by Alex on May 07, 2017 - 2:28:59 pm UTC
Thank you all who joined us for the Woburn Challenge 2016-17 on-site finals! Yesterday we witnessed 10 schools battle it out for the title of Woburn Challenge champion. In the end, Jason Yuen and William Wen of Pierre Elliott Trudeau High School came out on top of the senior and junior divisions respectively. Thank you to contestants and teachers alike, who stayed with us through to the end of the season.

The contest problems have been cloned to the main judge: J1, J2, J3/S1, J4/S2, J5/S3, S4, S5.
Problems, solutions, and test data will be posted shortly to this page. We truly hope that you enjoyed tackling them.

The senior division prizewinners are:
  • Jason Yuen of Pierre Elliott Trudeau High School ($250)
  • Brian Chau of Woburn Collegiate Institute ($200)
  • Joey Yu of Thornhill Secondary School ($150)
The junior division prizewinners are:
  • William Wen of Pierre Elliott Trudeau High School ($150)
  • William Fung and Sunny Lan of Richmond Hill High School ($100)
  • Jeffrey Gao and Richard Yi of William Lyon Mackenzie Collegiate Institute ($75)
Congratulations! We would love to hear your feedback about how to improve for next year, so please send them to [email protected] Have a great summer, and don't stop practicing!

Woburn Challenge round 4 results are now available!

by Alex on Apr 15, 2017 - 7:09:43 am UTC
Thank you for joining us for the final online round of the year! We found the problems for this round to be tough but fair. There were several perfect scores in both divisions despite how challenging the problems have become. Superb! Problems, solutions, and test data are now posted here.

The senior division prizewinners are:
  • Brian Chau of Woburn Collegiate Institute ($200)
  • Leo Feng of Vincent Massey Secondary School ($100)
  • Arielle Shannon of University of Toronto Schools ($50)
  • Zixiang Zhou of University Heights Public School ($50)
  • William Wen of Pierre Elliott Trudeau High School ($50)
The junior division prizewinners are:
  • Justin Pu of William Lyon Mackenzie Collegiate Institute ($50)
  • Allan Xu of Woburn Collegiate Institute ($25)
  • Arsh Raza of William Lyon Mackenzie Collegiate Institute ($25)
Congratulations! These prizes will be distributed as Visa gift cards, and we will be contacting your teachers shortly about sending them out.

The date of the Woburn Challenge on-site finals will be released in the middle of next week, when the invitations will also be sent out. Be on the lookout!

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