IChO 2021 Japan remote IChO
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Welcome messages FY2020
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Organizing Committee
Catalyzer
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Steering committee meeting
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Results
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Participation
Participating countries
Important Dates
Guideline for examination
Registration
Problems
Preparatory problems
IChO Problems 2021
Previous preparatory problems
Previous problems
Practical tasks and their explainer videos
Educational Version of IChO2021 Problems
About
History
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Future IChO’s
Previous IChO’s
Guidelines for mentors
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Kansai area
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