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 66
addition 33
typoswap 30
problemsetter 26
slimes 23

Most Submitted Problems (Past Week)
Problem Submissions
helloworld 191
addition 131
problemsetter 117
fibo 115
fraud 111