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 37
fizzbuzz 34
addition 32
3nplus1 22
flamethrower 21

Most Submitted Problems (Past Week)
Problem Submissions
fizzbuzz 91
trivialexam 87
addition 86
dkdk 81
helloworld 63