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
helloworld 19
arrayfind 17
dyingpolynomial 12
sort 11
rightangtri 10

Most Submitted Problems (Past Week)
Problem Submissions
helloworld 80
foodchain 46
veryeasyproblem 45
sadtrainer2 40
gift 38