The International Olympiad in Informatics


[Update: Thu 11 June 2020]

Dear Friends of IOI,

We trust that you are managing well during this difficult period as the world fights the global COVID-19 pandemic.

The IC of the IOI held their 3rd online meeting on 6th June. We have the following important updates to share with the community.

First, IOI 2020, organized by Singapore, will be held online around the end of September 2020. We are in communication with organizers of IMO 2020, which is now moved to an online competition on 21st and 22nd September 2020.  The IC, along with the Singapore host organizers, are still working out many details, including technical and execution, concerning this special online IOI 2020. We will keep you updated as more information becomes available.

Secondly, IOI 2021 will be hosted by Singapore onsite, from Sunday, 20th June 2021 to Sunday, 27th June 2021. We are presently in communication with the ICPC Headquarters who have postponed their ICPC World Finals 2020 to Wednesday, 23rd June 2021.

We are scheduling our activities so that the actual IOI 2021 contest days, being on Tuesday, 22nd June 2021 and Thursday, 24th June 2021, are not concurrent with the actual ICPC World Finals 2020 contest day on Wednesday, 23rd June 2021.

At any rate, there are no students who can qualify for both IOI 2021 and ICPC World Finals 2020. Unfortunately, some IOI committee members and team/deputy leaders may also be involved with ICPC World Finals; we will work together to support the affected individuals.

If you have any questions or suggestions, please contact the IOI Secretariat at

Stay safe and best wishes,

Greg Lee
IOI President


[Update: Tue 26 May 2020]

Dear friends of IOI,

Just a quick update from the IC concerning IOI 2020 and beyond. The IC held an online meeting yesterday on May 25. After some discussion, the following plan was approved unanimously:
1. IOI 2020 will be held online.  Detail will be forthcoming soon.
2. IOI 2021 will be hosted by Singapore (originally by Egypt).
3. IOI 2024 will be hosted by Egypt.

Thanks to the dedicated work by the Singapore host team, all possibilities for an onsite IOI 2020 were explored.  Unfortunately unpredictable outlook of COVID-19 forced us to move the competition online.  Furthermore, thanks to Eslam and the Egyptian host team for switching to host IOI 2024 so that Singapore can host IOI 2021 onsite.

With the move to an online competition, many working details will need to be discussed by IC, ISC and ITC.  We will keep you all updated as more information becomes available. If you have any questions or suggestions, please contact the IOI Secretariat at

Stay safe and Best wishes,
Greg Lee
IOI President


20 – 27 June


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The 33rd International Olympiad in Informatics (IOI 2021) will be held in Singapore from 20 to 27 June 2021. It is the most prestigious computer science competition for secondary school and high school students around the world. The competition is one of five international science Olympiads held annually. IOI 2021 will be hosted by the National University of Singapore (NUS) School of Computing. The competition is powered by Acer and supported by the Ministry of Education (MOE) Singapore and the Singapore Exhibition & Convention Bureau (SECB).