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
helloworld 16
dyingpolynomial 15
lunchbox 14
smurf 13
addition 12

Most Submitted Problems (Past Week)
Problem Submissions
arraygraph 164
compleecode 107
imagination 95
trivialexam 93
dyingpolynomial 71