Open Contest

We invite everybody to participate in APIO 2020 Open Contest. The open contest will have the same problemset as APIO 2020. Therefore, we encourage people who have seen the problemset before the open contest to not participate in the open contest.

Technical Details

To participate in APIO 2020 Open Contest, you will need to register for a TLX account if you do not have one. Once you are logged in to TLX, you can register the contest at


The open contest will be held between Tuesday, 18 August 2020 (08:00 UTC+7) and Thursday, 20 August 2020 (08:00 UTC+7). The open contest is a virtual contest, which means you can participate at any time within that window. Once the “Start” button in the TLX contest is pressed, your individual 5-hour timer will be started.


The rules of APIO 2020 Open Contest follow the rules of APIO 2020, except:

  1. There will be no practice problemset.
  2. A contestant cannot submit a clarification request.