A special thank you goes out to Ms Valentina Krasteva and her students (Steven Guikal, Junyi Wang, and Evan Zhang) from William Lyon Mackenzie Collegiate Institute in Toronto for establishing, setting up and operating the contest on Saturday, 2 May, from 10am to 3pm.

Over 600 students from 110 schools from 21 school boards plus independent schools participated as individuals in this online contest from home.

The rankings of participants who earned points can be found on Final Results.

The problems with input and output data may be located under: Past Contests - Problem Sets.