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 23
cny 23
addition 17
lunchbox 15
magiccarps 12

Most Submitted Problems (Past Week)
Problem Submissions
nostatement 235
firefighting 103
cny 89
addition 57
lunchbox 57