Welcome to Codebreaker!

Codebreaker is the official platform for Singapore Informatics Olympiad training and contests. We have run selection for the International Olympiad in Informatics for the delegations of Singapore and Indonesia, as well as countless official national and school training programmes.

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Most Attempted Problems (Past Week)
Problem Users
bronzemedal 19
aoi_game 13
helloworld 12
aoi_umbrella 11
rhythmscore 11

Most Submitted Problems (Past Week)
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bronzemedal 89
festival 65
general 62
aoi_game 46
guardingtreasure 43