International Olympiad in Informatics (IOI)

https://ioinformatics.org

More than 90 countries around the world participate in this Olympiad

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Asia-Pasific Informatics Olympiad (APIO)

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European Girls Olympiad in Informatics (EGOI)

https://egoi.org

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Balkan Olympiad in Informatics (BOI)

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Junior Balkan Olympiad in Informatics (JBOI)

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North African Olympiad in Informatics (NAOI)

https://naoi2025.algerianoi.com

Started in 2025, with Egypt, Libya, Tunisia, Algeria, and Morocco participating

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European Junior Olympiad in Informatics (EJOI)

https://ejoi.org

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