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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Submissions Per Day
Most Attempted Problems (Past Week)
Problem Users
bronzemedal 18
helloworld 14
aoi_game 12
fibo 10
addition 9

Most Submitted Problems (Past Week)
Problem Submissions
bronzemedal 84
general 63
festival 62
aoi_game 42
guardingtreasure 37