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
do_you_like_me 202
round_up_division 194
childsetter4 177
addition 173
reverse 156

Most Submitted Problems (Past Week)
Problem Submissions
addition 726
round_up_division 718
do_you_like_me 698
pythonlist 573
childsetter4 558